FM 21-30 ( Military Symbols ) 1965 - CIE Hub

C 2, FM 21-30Paragraph PageIII. NATIONAL DISTINGUISHING LETTERS(STANAG 1059) _-----__--__----__----__----_- ____ III-lIV. LOGISTICAL INSTALLATIONS, UNITS, ANDPIPELINESLogistical and Medical Installations ________ IV-1 IV-1Pipelines ________-__--____--___---_-_-____-_--_- IV-2 IV-3Field Army Support Command Units ______________ IV-3 IV-3Communication Zone Units _-----___----__--__ IV-4 IV-11V. FORTIFICATION AND OBSTACLE SYMBOLSFortifications __ __--_----__---_-----------_---_-- V-1 V-1Obstacles Other Than Mines -_._-.____-- __.____- V-2 V-2Mines _______ -_____ _.---- _-__-_ V-3 V-5Miscellaneous _-_-___-----------_----------------- V~4 V-7VI. AVIATION SYMBOLS --.-----.-.------------------- VI-1VII. COMMUNICATION SYMBOLS ______---__----__ ... VII-1VIII. ADDITIONAL SYMBOLS UNIQUE TO THEUNITED STATES MARINE CORPS _____ .. ___ VIII-1Hi

2-5. SIZE INDICATIONC2, FM 21-30a. To show the size of a specific unit or activity, the appropriatesize indication is placed on top of the basic symbol,, Size indication ofmajor commands within the communications zone is shown in appendix IVINDICATION UNIT SIZESquadSection or unit larger than squad butsmaller than a platoon.Platoon or DetachmentIMCompany, Battery, or TroopBattalion or SquadronGroup or RegimentBrigade or Equivalent CommandXXXXXxxxxxxxxxMission Command (Mission Command?control noi.divisional groups/brigadesas assigned or attached )DivisionCorpsArmyArmy GroupXXXExamples:platoon) (A companyobservation post)corps headquarters)2-3

C2, W- 21-301>. The notation j j placed over the size of a unit indicates a temporary grouping ofunits, usually for a specific tactical operation and in which the denoted unit functions as"the command or controlling element.Examples:1-76 1-431-4(Team A, 1-76)Mech(1-43 Arty)Bn Gp(Task Force)1-4c. If a unit is substantially reinforced, a (-{ ) may be placed to the right of the symbol.Example:JLL(A reinforced battalion)d. If a substantial part of the unit is detached, a (-) may be placedto the right of the symbol. A (-) may also be used to indicate that subordinate elements are operating at extended distances from, and semi-independently of the parent unit.i rExample:(A battalion less detachments)2-6. INTERSERVICE DESIGNATIONa. Military symbols referring to army units, installations and activities have no specialdesignation.Example:A(An army observation post)b. For interservice use, naval units, installations, and activities are indicated by thesymbol + (an anchor).Example:(A navy logistical installation)2-4

C2, FM 21-30SerialDuty Performed Symbol Remarks14Psychological Warfare^iMegaphone15Repair amiMaintenanceDCDouble end wrench16ReplacementREPLAbbreviation17Rocket and guidedmissilemMissile18ServicesvcAbbreviation19Special ForcesSFAbbreviation20SupplyI Bottom of symbol is heavilyI _jshaded21 TopographicDividers22 a. AirmobileAirmobile2-9Elongated \j placed in theupper center of the box.Denotes units organic tnairmobile organization andtrained in airmobileoperations.Stem with base. Used todistinguish airmobile unitsthat hare sufficient organicaircraft to perform airmobilemission.

C2, FM 21-302-9. COMBINING BRANCH OF SERVICE AND DUTYPERFORMED SYMBOLSCombat operations usually call for military organizations specially equipped and trained toaccomplish a specific tactical mission. To pictorially represent these specialized military organizations, a combination of symbols may be placed witMn the unit or installation symbol, as long asthe symbol remains clear and easily understood. Examples of symbol combinations are shownbelow.Serial Combination Symbol RemarksAerial Observation(Surveillance)2 Air Cavalry3 Airborne InfantryGull's wings are placed inbottom of box4 Amphibious EngineerAmphibious TankArmored CavalryArmored WheeledArmored symbol combinedwith wheeled cross-countrysymbol.2-10

C2, FM 21-30Serial Military Symbol Unit DesignationIIX - 1st Reconnaissance Squadron,(Airborne) 8th cavalry.6Company A, 3d Battalion(Airborne), 32d Armor.FWO COMM8MPForward CommunicationsCompany, 5th Signal Battalion,(Airborne).2d Military Police Company,(Airborne).Division Support Command,9SPT M 101st Airborne Division.1ft 10HHBAND11KK82212Headquarters, HeadquartersCompany and Band, 82dAirborne Division.212th Medical Battalion,(Airborne).12AIREQUIPOPTbhM jo,Air Equipment SupportCompany, 101st AirborneDivision.13 2-5082d Battalion, Observation Post,508th Airborne Infantry.2-23

C2, FM 21-30b. Armored DivisionSerial Military Symbol Unit DesignationXX1st Armored Division.1st Battalion, (155/8, SP) 18thArtillery, 4th Armored Division.4-54/^20 8-31/21 'oSPT1st Battalion (Mechanized), 54thInfantry, 3d Brigade, 2dArmored Division.Company A, 8th Battalion,33d Armor, 21st ArmoredDivision.Division Support Command,1st Armored Division.16th Engineer Battalion, 4thArmored Division.AVUBArmored Vehicle LaunchedBridge Platoon, Bridge Company,31st Armored Engineer Battalion.8Air Mobile Company, 16thAviation Battalion.CMDOPSHQCommand Operations Company,81st Signal Battalion.Headquarters and MainSupport Company, 45thMaintenance Battalion.2-24

C2, FM 21-30Serial Military Symbol Unit Designatione. Airmobile Division1st Cavalry Division,(Airmobile).2nd Brigade, 1st CavalryDivision,(Airmobile).Support Command, 2dDivision, (Airmobile)Battery A, 3d Battalion'XX/ 3 (105-MM, towed), 33dArtillery, 3d Division,(Airmobile).5th Aviation Group, 2dDivision,(Airmobile).3/AHHS3d Platoon, Company A,73/X*IO/ XX73d Engineer Battalion,3d Division,(Airmobile)Headquarters, Headquartersand Service Company, 10thSignal Battalion, 4thDivision,(Airmobile).2-27

C 2, FM 21-30Serial Military Symbol Unit Designation3/DDetachment 3 (ForwardSupport), 15th Maintenance Battalion, 2dDivision (Airaobile).3d Platoon, Company D,2 ~5/2/| CAV 2d Battalion, 5th In-1 '•"*• •P-w.X———— »1J T\ •fantry, 2d Brigade,1st Cavalry Division(Airmobile).f. Divisional Air Defense Artillery UnitsILOM42CHAPOVUL3-8/ XXX5X3d Battalion (M42,SP),8th Artillery, 1stInfantry DivisionBattery C (Chaparral,SP), 1st Battalion,21st Artillery, 5thInfantry Division(Mechanized).Battery B (Vulcan,towed), 2d Battalion,15th Artillery, 9thInfantry Division.1st Platoon, Battery A(Vulcan, SP), 2d Battalion, 15th Artillery,9th Infantry Division.2-28

C2, FM 21-30Serial Military Symbol Unit Designationc. ArmorXXX4th Armored Brigade(Separate), 6th Corps.XX?XX14th Armored CavalryRegiment, 7th Army.)4/ XXXX3d Squadron, 14th Armored Cavalry Regiment,7th Army. (Note:Not a CARS unit.)d. ArtilleryXXX3xxxHeadquarters, 3dCorps Artillery.6th Artillery Group,7th Corps.2-92/82d Battalion (8-in,SP), 92nd Artillery,8th Artillery Group.2-31

C 2, FM 21-30Serial Military Symbol Unit Designation, 3d Battalion (175-mm, SP),3~89/J5 89th Artillery, 15thArtillery Group.e., AoiationHeadquarters and Headquarters Company, 8thAviation Group.8th Corps AviationCompany.119th Heavy HelicopterCompany, 10th AviationGroup (see app. VI).f. Engineer565 565th Engineer Construction GroupDPTRKcpc /'" 525th Dump Truck Company,931 931 Engineer ConstructionGroup2-32

C2, FM 21-30Serial Military Symbol Unit DesignationMAB725th Mobile AssaultBridge Company, 5thEngineer Group.35 / X*9* 35th Topographic Battalion,9th Army.0. Special ForcesSF 312'Detachment 312, 5thSpecial Forces Group,(see para 2-8, 12).SF"1SFCompany C, 5th SpecialForces Group (see para2-8, 12).5th Special ForcesGroup (see para 2-8,12).2-33

C 2, FM 21-303-4. DATE-TIME GROUPSDates and times such as the opening of an installation or the expectedarrival of a unit in a new location may be written under or inside the symbol.Date-time groups are used:XXExamples:A09I430B(Present location of an observationpost which opened at 1430 hours, TimeZone B, the 9th of the month.)M0I800A(Future location of the headquarters ofan infantry division which is scheduledto open at 1800 hours, Time Zone A, the10th of the month.)3-5. PRECISE LOCATIONSTo indicate locations more precisely s the following methods are employed:a. Basic symbols other than the headquarters symbol may be placed on acentral staff which is extended or bent as required. The end of the staff mayindicate center of mass (e.g., in the case of a division symbol) or preciselocation (e.g., in the case of a battalion aid station).Examples:T 9 tb. Since the headquarters symbol already includes a staff, this staff maybe extended or bent as required. The end of the staff extension indicates theexact location of the headquarters.Example:c_. If a group of units or installation other than headquarters are at onelocation, the grouping of symbols may be inclosed with a bracket andthe exact location indicated with a staff.Example:d. If several headquarters are at one location, more than one symbol may beplaced on a single staff.Example:3-2

C2, FM 21-30c. The field of fire, automatic weapon, and fixed line of fire symbols are combined toindicate final -protective lines: Heavily shaded portions along the fixed, line of firesymbol indicate areas of grazing fire.Example:(Final protective line for a light machine gun)3-27. CONCENTRATION AND BARRAGESa. Friendly concentrations are normally identified by letter prefix and number. Additionally, concentrations may be labeled to show the type of target, type of weapon and fires,duration and time of fires, and the unit designated to fire the mission.Examples:DA65(Concentration) (Alternate method)b. Barrages are usually plotted to scale and shown as a rectangle. The unit designatedto fire the barrage may be indicated inside the rectangle.Example: A/2-5105(105-mm barrage to be fired by Battery A, 2d Battalion, 5th Artillery)3-28. PLANNED NUCLEAR FIRESPlanned nuclear fire is indicated by a "tick mark" considerably larger than the symbolused to denote concentrations of conventional weapons. The dot shows the exact location of thedesired ground zero. Additional information may be included as shown below.Example:(Height of Burst)(Firing Unit anddate/time to beexecuted)(Requesting Unit oridentifying number)(Yield a/o type ofweapon)3-11

C 2, FM 21-303-29. AREAS OF FIRE AND CONTAMINATIONSerial Explanation of Symbol Symbol RemarksGeneral symbol todenote indirect fires.The area inclosed bythe symbol indicatesthe approximate areaof fire.Area either screenedor to be screened bysmoke.Enemy fire is shown RED oroutlined with a double line;friendly (ire is shown in BLUEor BLACK.Date and lime may be added.SMOKE10 0700-07302Area subjected to HEbombing from the air.Other types of fire are similarlyshown. For example: Air-to-Surface Missile (ASM) orSurface-to-Surface Missile(SSM).Biologically (BIO) orchemically (G)contaminated areas.The symbol is shown in yellowand the letters G or E10are written in the center.Radioactive areaBF 0700EF I 130The intensity expressed inrad/hr may be shown insidethe triangular signs of theiso-intensity curve. The timesof the beginning (BF) andend (EF) of radioactive falloutmay be shown in a rectangularbox as part of the symbol.3-12

C2, FM 21-303 30. NATO Symbols For Nuclear Explosions(STANAG 2019, Military Symbols)Explanation Military Symbola. The nuclear explosion is representedby a mushroom the foot of the stemindicating the position of ground zero.b. Inside the segment representing themushroom head are shown the power (KTor MT) and the date-time group of theexplosion. When not accurately known(e.g., for enemy bursts), the poweris shown between brackets.c. The height of the explosion is shownin meters alongside the stem. If notaccurately known, the approximateheight should be shown, i.e., HIGH,LOW, SURFACE, SUBSURFACE.d. The direction of the prevailing windblowing between the ground and themaximum height of the nuclear cloudmay be shown by an arrow pointingaway from ground zero (figure 1).500mI5KT280600ZFigure Ie. If the mushroom is known to be"fallout producing", the stem ofthe mushroom will be shaded(figure 2).LOWIOKT'290830ZFigure 23-13

C 2, FM 21-30Explanation Military Symbolf. Planned explosions may be shownin a similar way by the use ofdotted lines as shown in figure 3./ 10 KT \'300600Z*vFigure 3g. The boundaries of areas damagedin various degrees may be shownby concentric circles with groundzero as centre.h. Normal colours for friendly (BLUE)and enemy explosions (RED) shouldbe used. If only one colour isavailable enemy explosions shouldbe indicated by the use of doublelines for the mushroom head, seefigure 4.i. As an addition to this basic STANAG2019 military symbol, friendly atomicdemolition munitions (ADM) are shownin green denoting an obstacle. EnemyADM are shown in green-red or blackgreen-black.The letters "ADM" areshown at the top of the mushroomcloud to denote their unique employment. For planned, friendly ADM, therelease authority is shown in themushroom cloud in lieu of the datetimegroup of the nuclear detonations.When the commander changes the planning allocation to an assignment tofire, the release authority is erasedand the date-time group inserted.Otherwise, the basic nuclear explosionsymbols and meanings are the same asabove. See figure 5.Figure 4ADM/ON ORDER \£G£thlNPDIV(US)SUB- \SURFACE \ /—— 10m(Color: Green)Figure 53-14

IV-4. COMMUNICATIONS ZONE UNITS 02. FM 21-30a. A combat service support organization or unit within the communications zone (GOMMZ), unless part of a field army support command (FASCOM),is represented by-fa. A headquarters of a combat service support organization or unitwithin the COMMZ is represented by--c. Below division equivalent, and with the exception of the basicsymbol, the symbols for combat service support organizations and unitswitin the COMMZ are developed in a similar manner to that described forcombat service support organizations or units of the FASCOM (para IV-3).d. Size indication designating COMMZ organizations and units ofdivision or higher equivalent are shown as follows:(1) H |- Mission Command. Mission Commands control nondivisionalgroups/brigades as assigned or attached.(Examples: Engineer Command, Supply and MaintenanceCommand, Medical Command, Transportation Command,or Personnel Command).(2) 00 Area support command (ASCOM) of TASCOM (when there isonly one ASCOM in the COMMZ) or forward or rear ASCOM(when there are two or more ASCOMs in the COMMZ).Also ASCOM boundary symbol.IV-11

C 2, FM 21-30(3) 0000 Theater army support command (TASCOM) ; theaterarmy civil affairs command (TACAC); or equivalent command organization at theater level.Also TASCOM or COMMZ boundary symbol.(4) 00000 Theater rear boundary when the TASCOM boundaryis not the same as the theater rear boundary.e. Examples of the combat service support headquarters in theCOMMZ are shown below.Serial Military Symbol Unit Designationoooo|20Headquarters, 50th Engineer Command, 120th TheaterArmy Support Command.121/0000i*i/Headquarters, 121st Transportation Command, 120thTheater Army Support Command.0000(FWD)Headquarters, I32d AreaSupport Command, 120thTheater Army Support Command.Headquarters, 123d AreaSupport Command (Forward),148th Theater Army SupportCommand.IV-12

C2, FM 21-30Serial Military Symbol Unit Designation5.6.00\ SPT/I 167/0000'(REAR)>0000SP-mZO/TAMEHeadquarters, 167th AreaSupport Command (Rear),148th Theater Army SupportCommand.Headquarters, 120th TheaterArmy Support Command,Theater Army, Middle East.IV-13

C2, FM 21-30Explanation ofSerial Symbol Symbol Remarks14 Gaps or lanesa. A belt of 600 mixedantipersonnel minesand double antitankmines, some ofwhich are boobytrapped.A gaptraverses this belt,b. A belt of 400 antitank mines, some ofwhich are boobytrapped.A gaptraverses this belt..A belt of 400 antitank mines, some ofwhich are boobytrapped.Alonetraverses this belt.Toxic chemicalminefields\/ \GapA portion of a barrierin which no obstacleshave been constructed.It is wide enough to enable a friendly force topass, through in tacticalformation; it is in excessof 16 meters and seldomless than 100 meters wide.LaneA clear route through anobstacle. Single lane normally 8 meters wide andsuitably marked. Doublelane is 16 meters wide.HD TyPe of texic agent is shown,on outside of symbol.16 Mixed antitank, antipersonnel, andchemical toxic mines.Tripwire or boobytrap symbolsadded as needed.V-4. MISCELLANEOUS SYMBOLSju The following symbols may be used in conjunction with other symbols:(1) Phony (dummy) (normally placed oversymbol)V-7

C2, FM 21-30N/^(2) N Destroyed (superimposed over symbol)o(3) ' Unconfirmed, unknown' ' UC Under construction( 5) U UnoccupiedExamples:b.Phony (dummy) minefield fenced(2)I X I Destroyed emplacement^ ' -\ U y Unoccupied strong point;>^—,—-^

C 2, FM 21-30APPENDIX VIIIADDITIONAL SYMBOLS UNIQUE TO THE UNITED STATES MARINE CORPSVlll-l. The symbols contained in this appendix, with some exceptions,are unique to the United States Marine Corps. They are included for theconvenience of United States Marine Corps units and those United StatesArmy units operating therewith. For interservice use, Marine Forcesinstallations and activities are indicated by the symbol (waves)placed under the basic symbol. See paragraph 2-6d, page 2-5. _^Vlll-l

C2, FM 21-30UNITED STATES MARINE CORPS SYMBOLSVIII-2. Equipment SymbolsITEM SYMBOLa. M50 Ontos(106 MM recoilless riflemounted on a trackedchassis)b. LVTP(Landing vehicle,tracked, personnel)c. LVTH(Landing vehicle,tracked, howitzer)d. LVTE(Landing vehicle,tracked, engineer)e. LVTR(L^lnding vehicle,tracked, recovery)VIII-2

C2, FM 21-30UNITED STATES MARINE CORPS SYMBOLSUNIT SYMBOLf. M79 Grenade LauncherNote; Not unique to MarineCorps. May also be used byU.S. Array units.rIII-3 Unit Symbols:UNIT SYMBOL EXAMPLEa. Fire Team,(Rifle Squad)0'0,(2d Fire Team, 2d Squad)b. Shore PartyUnitSP SP(Company B, 2d Shore PartyBattalion)c. Amphibian TractorUnit(Company A, 2d AmphibianTractor Battalion)d. Air/Naval GunfireLiaison CompanyUnitANGLVIII-3ANGL 2 ANGL(2d Air/Naval GunfireLiaison Company)

C2, FM 21-30UNITED STATES MARINE CORPS SYMBOLSUNITe. Force ServiceUnitSYMBOL EXAMPLE(S)HIFSR

UNITED STATES MARINE CORPS SYMBOLSC2, FM 21-30g. Marine Aviation. A combination of standard symbols and variousletter designations are used to depict aviation units. A symbolcontaining an open propeller is used for all units other than thoseorganic to a helicopter group. The latter use the standard helicopter symbol. A unique letter system is utilized to depict theidentification and primary function of aircraft squadrons. Allother units are identified by an abbreviated title that showsorganization and functions. The following letter system is usedto identify aircraft squadrons:First LetterV - Fixed-wing aircraftH - HelicopterSecond LetterM - MarineThird and Fourth LettersA - Attack type aircraftF - Fighter type aircraftC - CompositeG - In-flight refuelerJ - Photo/reconnaissanceH - Heavy helicopterO - ObservationM - Medium helicopterAW - All weatherR - Transport type aircraftVIII-5

C2, FM 21-30UNITED STATES MARINE CORPS SYMBOLSEXAMPLES:xxoo(2d Marine Aircraft Wing)OO 33(Marine Aircraft Group 33)OiO 16(Marine Aircraft Group 16)OOMACG(Marine Air Control Group 2)OOVMF232(Marine Fighter Squadron 232)OOVMCJ(Marine Composite Reconnaissance Squadron 1)VIII-6

UNITED STATES MARINE CORPS SYMBOLSC2, FM 21-30EXAMPLES:iiC>fOHMM164(Marine Medium Helicopter Squadron 164)OjOVMO(Marine Observation Squadron 2)MACS(Marine Air Control Squadron 3)nCX3MWCS(Marine Wing Communications Squadron 2)00WERS 37(Wing Equipment and Repair Squadron 37)ooVMPAW 314(Marine All Weather Fighter Squadron 314)VIII-7

FIELD MANUALNo. 21-30*FM 21-30HEADQUARTERSDEPARTMENT OF THE ARMYWASHINGTON, D.C., 30 June 1965MILITARY SYMBOLSParagraph PageCHAPTER 1. INTRODUCTIONPurpose____________________________ 1-1 1-1Scope_______________________________. J-2 1-1CHAPTER 2. BASIC MILITARY SYMBOLSSection I. GeneralDefinition of a Military Symbol____________—— 2-1 2-1Use of Symbols_________________-_____—. 2-2 2-1Allied Use___________________________— 2-3 2-1II. Unit SymbolsUnits and Installations______________———————— 2-4 2-2Size Indication____________________———— 2-5 2-3Interservice Designation_______________——————- 2-6 2-4Designation by Arm or Branch of Service____—————. 2-7 2-5Designation by Duty Performed_______________- 2-8 2-7Combining Branch of Service and Duty PerformedSymbols_____________________________. 2-9 2-9III. Equipment SymbolsBasic Weapon Symbols_____________-____——- 2-10 2-11Grouping of Weapons_____________-____——- 2-11 2-14Alternate Method of Size Indication__________— 2-12 2-14Armored Vehicle Symbols_________________— 2-13 2-15Vehicle Symbols_________________________ 2-14 2-15Combining Equipment and Unit Symbols___—__— 2-15 2-17IV. Unit DesignationsParent Units__________________________- 2-16 2-18Unit Designation and Basic Symbol___________— 2-17 2-18Combat Arms Regimental System (CARS)________ 2-18 2-18Echelons of Command in Combination with DutyPerformed and Size_____________________. 2-19 2-19Use of Abbreviations______________________ 2-20 2-20National Designation_______________________. 2-21 2-21V. U. S. Unit SymbolsGeneral______________________________ 2-22 2-22Divisional Units________________________- 2-23 2-22a. Airborne____________________________ __ 2-22b. Armored______________________________ __ 2-24c. Infantry____________________________. __ 2-25This manual supersedes FM 21-30, 5 May 1961.AGO. 9142A

FM 21-30Paragraph Paged. Infantry (Mechanized)______________-_———_ —— 2-26Non-Divisional Units______________________. 2-24 2-27a. Air Defense____________________————- —— 2-276. Armor________________________________ __ 2-27c. Artillery_____________________________"_. __ 2-27d. Aviation__________________________!___ __ 2-28e. Engineer________.._________-________ _— 2-28/. Special Forces__________________________ _— 2-29CHAPTER 3. MAP AND OVERLAY TECHNIQUESection I. Situation Maps and OverlaysGeneral____________________________—— 3-1 3-1Colors_____________________-_________ 3-2- 3-1Present and Proposed Locations_____——___———_ 3-3 3-1Date-Time Group______________________—— 3-4 3-2Precise Locations_——___—_———_——————————— 3-5 3-2Task Forces___________________________. 3-6 3-3Enemy Forces______________________——- 3-7 3-3Front Lines___________________________ 3-8 3-4Objectives______________________________—. 3-9 3-4Assembly Areas (Undefended Areas)_——_——————. 3-10 3-4Attack Positions_________________________. 3-11 3-5Defended Areas_________________________ 3-12 3-5Miscellaneous Areas____________——_————— 3-13 3-5Lateral Boundaries—_______________————- 3-14 3-6Rear Boundaries____..___________________. 3-15 3-6Proposed Boundaries.____________——_—————— 3-16 3-6Infiltration Lanes________________________- 3-17 3-6Axis of Advance_________________-____———_. 3-18 3-7Direction of Attack and Routes of March_________ 3-19 3-7Convoys______________________________. 3-20 3-7Control Lines___________________________ 3-21 3-8Control Points__________________________. 3-22 3-8Activity Symbols_________________________ 3-23 3-9Section II. Fire Plan OverlaysGeneral_______________________________ 3-24 3-10Field of Fire_______.._________________. 3-25 3-10Direction of Fire________________________ 3-26 3-10Concentration and Barrages_________________ 3-27 3-11Planned Nuclear Fires____________________ 3-28 3-11Areas of Fire and Contamination______________ 3-29 3-12Nuclear Detonations______________________ 3-30 3-13Atomic Demolition Munitions_________________ 3-31 3-14APPENDIX I. REFERENCES 1-1II. PROVISIONS OF NATO STANDARDIZATIONAGREEMENT 2019 (2d Edition)U. S. Modifications_______________________ II-l II-lBranch Symbols of Allies___________________. II-2 II-2NATO Unit Symbols______________________. II-3 II-3uAGO 9142A

FM 21-30III. NATIONAL DISTINGUISHING LETTERS(STANAG 1059)Paragraph PageIV. LOGISTICAL INSTALLATIONS, UNITS, ANDPIPELINESLogistical and Medical Installations_____________- IV-1 IV-1Pipelines_______________________________- IV-2 IV-3Field Army Support Command Units____________- IV-3 IV-3Communication Zone Units_________________. IV-4 IV-11V. FORTIFICATION AND OBSTACLE SYMBOLSFortifications_________________..______— V-l V-lObstacles Other than Mines__________________- V-2 V-2Mines_______________________________. V-3 V-5Miscellaneous________ :________________—- V-4 V-7VI. AVIATION SYMBOLS V-lVII. COMMUNICATION SYMBOLS VII-1AGO 9142A

FM 21-30CHAPTER IINTRODUCTION1-1. PURPOSEThis manual establishes a standard system for the development of military symbols applicable to all types of military operations. Guidance and reference material are provided for militarypersonnel engaged in the production and utilization of maps, operation plans, orders, overlays,overprints, and reports as well as aerial photos, other map substitutes, and organizationalcharts. Additionally, instructional material applicable to the training of operational personnel isfurnished.1-2. SCOPEa. No attempt to depict all military symbols has been made. Rather, a uniform method ispresented for pictorially portraying various military organizations, activities, and items of equipment. Once the user is familiar with the prescribed system, any desired symbol is easily developedby following a clear, logical, and concise sequence. The importance of a commonly acceptedmethod of military symbols which are readily identified by military personnel, both allied andU. S., cannot be overemphasized.b. This manual incorporates the method of military symbols approved for use by the member nations of the North Atlantic Treaty Organization (NATO). In certain instances, however,it has been necessary to modify the provisions of the NATO Standardization Agreement (STA-NAG) to fit the organization and normal employment of U. S. units. Furthermore, additionalsymbols applicable to U. S. Forces only have been included to provide greater flexibility in thepictorial representation of military significant items. These modifications and additions are readily indentified by use of italic type throughout the text. Portions of STANAG 2019 (2d Edition)pertaining primarily to NATO symbology are inclosed as Appendix II.c. The military symbols presented by this manual do not supersede the topographic symbolsdescribed in FM 21-31, Topographic Symbols, or route reconnaissance symbols described in FM5-36, Route Reconnaissance and Classification.d. The material presented herein is applicable to peacetime operations as well as to limitedand general war, either nuclear or nonnuclear.e. Users of this manual are encouraged to submit recommended changes or comments to improve the manual. Comments should be keyed to the specific page, paragraph, and line of the textin which the change is recommended. Reasons should be provided for each comment to insureunderstanding and complete evaluation. Comments should be forwarded directly to the Commanding Officer, U. S. Army Combat Developments Command Engineer Agency, Fort Belvoir, Virginia.AGO 9142A _

FM 21-30CHAPTER 2BASIC MILITARY SYMBOLSSection I. GENERAL2-1. DEFINITION OF A MILITARY SYMBOLA military symbol is a sign composed of a diagram, number, letter, abbreviation, color, orcombination thereof which is used to identify and distinguish a particular military unit, activity,or installation (AR 320-5).2-2. USE OF SYMBOLSa. Military symbols are used primarily in conjunction with—(1) All types of situation maps and overprints.(2) Field sketches and overlays.(3) Aerial photographs.(4) Organizational charts.b. Military symbols are graphic aids which accurately identify items of operational interest.Departure from commonly accepted symbols should be avoided. If symbols must be improvisedtheir meaning should be explained in an accompanying legend.c. Military symbols lose their value if they become complicated or cluttered with unnecessarydetail. The purpose and level of command, the training and background of personnel, and thetactical situation determine the amount of information required to adequately represent militaryunits and installations. A flexible system is presented in this manual whereby the user mustadapt military symbols to fit his own particular requirement. The examples throughout this manual are instructional in nature and are designed for reference purposes; consequently, more information is shown than is normally required. In practical application, however, operational personnel and instructors should strive to depict only essential information. Simplicity, uniformity, andclarity are the keys to good military symbology.2-3. ALLIED USEIf military symbols include words or abbreviations, the language will be native to the country employing the symbol. If, however, a document containing symbols is to be transmitted toforces of other allied nations or combined headquarters, an explanation or translation of symbols whose meaning may cause doubt is provided in an accompanying legend.AGO 9.142A 2-1

FM 21-302-4. UNITS AND INSTALLATIONSSection II. UNIT SYMBOLSGeometric figures form the basic symbols used to represent units and installations. Examples of the more common figures are as follows:a. A unit (a rectangle)b. A field headquarters or headquarters echelon of a unit (Staff is always to the left)c. An observation or listening postd. Combat service support elementsof U. S. combat units (brigadetrains and below)e. A logistical installation or activity:f. A combat service support unitthat performs duties as a partof a fiield army support command (see app. IV)g. A headquarters or headquartersechelon of a field army supportcommand combat service support unit. (Staff is ahvays to theleft)h. A combat service support unitthat performs duties ivithin thecommunications zone (see app IV)t. A headquarters or headquartersechelon of a combat service support unit ^v^th^n the communications zone2-2 AGO 9142A

2-5. SIZE INDICATIONFM 21-30a. To show the size of a specific unit or activity, the appropriate size indication is placed ontop of the basic symbol. Size indication of major commands within the communications zone isshown in appendix IV.INDICATION UNIT SIZESquadSection or unit larger than squad but smallerthan a platoon.Platoon or DetachmentCompany, Battery, or TroopBattalion or SquadronGroup or RegimentXXXXXXxxxxxxxxxBrigade or Equivalent CommandDivisionCorpsArmyArmy GroupExamples:XXX(A platoon)(A companyobservation post)(A corps headquarters)AGO 9142A 2-3

FM 21-30b. The notation I I placed over the size of a unit indicates a temporary grouping ofunits, usually for a specific tactical operation and in which the denoted unit functions asthe command or controlling element.Examples :(Company team) (Battalion task force)c. If a unit is substantially reinforced, a (4) may be placed to the right of the symbol.Example:(A reinforced battalion)d. If a substantial part of the unit is detached, a (-) may be placed to the rightof the symbol.Example:JJL(A battalion less detachments)2-6. INTERSERVICE DESIGNATIONa. Military symbols referring to army units, installations and activities have no specialdesignation.Example:(An army observation post)6. For interservice use, naval units, installations, and activities are indicated by thesymbol -f- (an anchor).Example:(A navy logistical installation)2-4AGO 9142A

FM 21-30c. For interservice use, air force units, installations, and activities are indicated bythe symbol CXD ( an °Pen propeller).Example: oo(An air force unit)d. For interservice use, Marine Forces, installations, and activities are indicated bythe symbol S S S (waves) placed under the basic symbol.Example:S S S(A marine observation post)2-7. DESIGNATION BY ARM OR BRANCH OF SERVICERarely will modern ground warfare be conducted solely by a single arm or branch of service.Military units, representing various branches of service, work closely together under a single command. Traditionally, however, armies have been divided into arms and branches of service. Although today's battlefield requirements demand the combined effort of all types of troops, the traditional arm or branch symbol plays an important role in developing proper symbols for variousmilitary groupings. These branch of service symbols are shown below.Serial Arm or Branch Symbol RemarksArmor Tank TrackArmy Security Agency ASA AbbreviationArtillery Cannon-ballAGO 914242-5

FM 21-30Serial Arm or Branch Symbol Remarks4 Chemical (CBR)5 Coast ArtilleryCrossed retorts. The term —Nuclear, Biological, andChemical — is used by NATOForces.Applicable to foreign armiesonlyCavalry(Reconnaissance)Cavalry bandoleer7 EngineerBridge8 Finance (Pay)Strong box9 InfantryCrossed straps10 MedicalGeneva Cross11 Military IntelligenceAbbreviation12 Military Governmentor Civil AffairsShield13 Military PoliceAbbreviation14 OrdnanceBursting bomb2-6 AGO S142A

FM 21-30Serial Arm or Branch Symbol Remarks15 Postal

FM 21-30Serial Duty Performed Symbol Remarks3 AmphibiousWaves. Not to be confusedwith Marine Forces.4 AntitankUpside down V5 Army AviationShaded propellerData Processing UnitAbbreviationElectronic WarfareElectronic Wave8 Irregular ForcesCapital I. Armed groups,not members of regulararmed forces.Motorized(Temporarily)Vehicles are not organicequipment.10 Motorized (crosscountry capability)The wheeled vehicles areorganic and have a crosscountry capability.11 Mountain12 Parachute13 Personnel Service andAdministration (AdjutantGeneral)PSShaded MountainParachute. Used to distinguishU. S. units parachute qualifiedbut not assigned to airborneunits.Abbreviation2-8 AGO 9142A

FM 21-30Serial Duty Performed Symbol Remarks14 Psychological War/we Megaphone15 Repair andMaintenance Double end wrench16 Replacement Abbreviation17 Rocket and guidedmissileMissile18 Service Abbreviation19 Special Forces Abbreviation20 SupplyBottom of symbol is heavilyshaded21 Topographic Dividers2-9. COMBINING BRANCH OF SERVICE AND DUTYPERFORMED SYMBOLSCombat operations usually call for military organizations specially equipped and trained toaccomplish a specific tactical mission. To pictorially represent these specialized military organizations, a combination of symbols may be placed within the unit or installation symbol, as long asthe symbol remains clear and easily understood. Examples of symbol combinations are shownbelow.AGO 9142A 2-9

FM 21-30Serial Combination Symbol Remarks1 Aerial Observation(Surveillance)2 Air Cavalry3 Airborne InfantryGull's wings are placed inbottom of box4 Amphibious Engineer5 Amphibious Tank6 Armored Cavalry7 Armored WheeledArmored symbol combinedwith wheeled cross-countrysymbol.8 Engineer, BridgeEngineer symbol combinedwith the topographic bridgesymbol.9 Mechanized InfantryArmor and infantry symbolcombined.10 Supply and Maintenance2-10AGO 9142A

FM 21-302-10. BASIC WEAPON SYMBOLSSection III. EQUIPMENT SYMBOLSa. Symbols are also used to indicate the type and location of a weapon or group ofweapons. When a weapon symbol appears on a map or overlay, the base of the shaft indicatesthe location of the weapon.1). To show the approximate size of a particular weapon, the procedure is as follows:(1) Select the appropriate weapon symbol.Examples:(Basic infantry weapon) (Basic artillery weapon)(2) One (for medium) or two (for heavy) horizontal bars are added to denote approximate size. If no horizontal bar is shown, the light category is represented.Examples: H(Light automatic weapon) (Medium artillery gun)c. If a weapon has a high trajectory, a O ^ s placed at the base of the shaft.Example:(Medium mortar)d. If the weapon is a flat trajectory, antitank weapon, a /\ is placed at the baseof the shaft.Example: MlA(Light antitank gun)e. If the weapon is primarily for air defense, a ^"^ is placed at the base of the shaft.Example:(Heavy air defense gun)/. If the weapon is a rocket projector or launcher, a is placed at the head ofthe shaft.^Example: III(Light artillery rocket launcher)AGO 9142A 2-11

FM 21-30g. If a weapon is also a tracked, self-propelled vehicle, aweapon symbol.is placed below theExample:o(A tracked, self-propelled medium howitzer)h. Weapon symbols and missile launching sites are shown below.——————————————————————-———————————————Serial Light Medium HeavytAutomatic infantry weaponMortarAir defense machine gunfaAntitank rocket launcherGun or gun/howitzerHowitzer2-12AGO 9142A

FM 21-30Serial LightSIZEMedium HeavyGun in antitank roleRecoilless rifleH10 1'Rocket launcher (artillery)Gun in air defense role11Missile or rocket12Missile in air defense role13Missile in antitank roleAGO 9142A 2-13

_________________SIZE__________________Serial Light Medium Heavy14Surface-to-surface missile (SSM) launching site15fl III I flrSurface-to-air missile (SAM) launching site16(portable) (vehicular NONEmounted)Flame Thrower17NONE NONE2-11. GROUPING OF WEAPONSSmoke GeneratorGroupings of weapons or multiple barrels may be indicated by writing the number ofweapons to the left of the symbol.Examples: 4t •'!'(Four medium mortars) (Four light anti-aircraft guns or onefour-barrel light anti-aircraft gun)2-12. ALTERNATE METHOD OF SIZE INDICATIONAnother method of indicating the size of a weapon is to write the caliber of the weaponto the right of the symbol.il81 ' I(81-mm mortar) (105-mm howitzer)2-14AGO 9142A

FM 21-302-13. ARMORED VEHICLE SYMBOLSSymbols have also been adapted to represent armored combat vehicles.SIZESerial Light Medium Heavy1TankFull-tracked armored personnel carrierArmored reconnaissance vehicle2-14. VEHICLE SYMBOLSFull-tracked armored assault guna. Symbols for vehicles other than those shown in paragraph 2-13 are made by combiningtwo types of symbols. One symbol denotes the kind of body; the other, the means of mobility.(1) Body types.(a) Personnel and/or cargo carrying(b) Operational unarmoredAGO 9142A 2-15

FM 21-30(c) Operational armored(d) Amphibious armored(e) Amphibious (cargo)(/) Engine/locomotive(2) Means of mobility.(a) Tracked or half-tracked(b) Self-propelled (tracked)o(c) Self-propelled (wheeled)(d) Wheeledo o(e) Wheeled cross-country(/) Railway(g) Sledge (towed)co o ooo oo(h) Over-snow (prime mover)(i) AnimalAA(j) Barge or boat2-16 AGO 9142A

FM 21-30b. Branch or administrative symbols may be placed inside the body type to indicate thevehicle load or usage. Further details, such as capacity of vehicle, may be indicated belowthe symbol.Examples:(1)(2)O CT5 TONA five ton cargo wheeled vehicleAn ambulance boat(3)A cargo carrying sledge (supplies/rations)(4)cA tracked amphibious vehicle, (cargo/personnel)2-15. COMBINING EQUIPMENT AND UNIT SYMBOLSIf it is desired to indicate the principal weapon or piece of equipment with which a militaryunit is equipped, the appropriate symbol is placed directly under the unit symbol.Examples:a.(Artillery battery with 105mm howitzers)(Chemical smoke generator platoon)AGO 9142A 2-17

FM 21-302-16. PARENT UNITSSection IV. UNIT DESIGNATIONSA parent unit has a title or numerical designation assigned to no other similarly organizedand equipped unit. All military units are either directly related through command echelons to aparent unit or are, in themselves, parent units. The level of command designated as the parentunit is variable. .To determine the parent unit for any particular organization, considerationmust be given to branch of service, organization, nationality, and military tradition. Size, however, is never an indication since parent units vary in composition from a section to an over-allheadquarters. A parent unit can be recognized only by its separate and distinctive title or number.2-17. UNIT DESIGNATION AND BASIC SYMBOLa. To indicate a particular unit or installation, the parent unit designation is placedimmediately to the right of the basic unit or installation symbol; additionally, the parent unitmay be underlined. Higher echelons of command follow to the right of the parent unit designation.To the left of the basic symbol, subordinate units are shown. Slashes separate command echelons.Only cardinal numerals are used. The arrangement of various combinations of symbols to depictspecific units or installation is shown in the following diagram:SUB- / B /SUB- /|H5 /SUBSUB / pUB / UNITUNITSIZEBRANCH ORDUTYPERFORMEDADDITIONALINFORMATION'HIGHERPARENT UNIT/ ECHELONSOF COMMANDb. If only one type of unit is assigned to a military organization and if the unit isadequately identified by other military symbols, its designation may be omitted.Example:(Bridge Company, 50th Engineer Battalion)NOTE: Current military organization specifies that only one bridge company will be assignedas an organic part of the 50th Engineer Battalion. Therefore, since identification of the BridgeCompany is indicated by the bridge symbol within the unit rectangle, further designation is notnecessary.2-18. COMBAT ARMS REGIMENTAL SYSTEM (CARS)Sometimes, parent units are identified by a combination of unit designations. Such aprocedure is employed by many units within the U. S. Army and is known as the Combat ArmsRegimental System (CARS). Under the CARS system, parent units are designated by bothn -, 0 AGO 9142AZ—18

FM 21-30the battalion (squadron) and traditional regimental numbers. To avoid confusion with differentlevels of command, both numerical designations are always written together and separated bya dash rather than slashes.Examples:1-16(Company A, 1st Battalion, 16th Infantry)I I12-68(12th Battalion, 68th Armor)B2-13(Troop B, 2d Armored Cavalry Squadron,13th Cavalry)2-19. ECHELONS OF COMMAND IN COMBINATIONWITH DUTY PERFORMED AND SIZEa. If there is a difference between the arm or branch of service or duty performed by amilitary unit and the unit to which it is assigned, the arm or branch of service or duty performedsymbol of the smaller unit is entered in the basic symbol. If desired, the service or duty performed symbol of the larger unit may be added under the basic symbol.Example:(A signal platoon of a tank unit)b. To show the branch of service or performed duty of one or more echelons in the chainof command, the appropriate symbol may be placed under the echelon.__LExample:(Air Cavalry Troop, 2d Armored CavalrySquadron, 13th Cavalry)AGO 9142A2-19

FM 21-30c. If it is desired to show the size of any echelon in the chain of command, the appropriate size may be placed over the unit designation.Example:(3d Battalion, 5th Infantry, 9th Division)d. If an installation or activity is identified by the unit to which it is assigned and if nofixed unit size is applicable, the size indication is placed over the command echelon by whichthe installation is identified. The branch of service or duty performed symbol may be placedunder the command echelon if desired.Examples:XXH4 2-503O O(Headquarters, 4th Division Artillery)(Trains, 2d Battalion, 503d Airborne Infantry)2-20. USE OF ABBREVIATIONSThe use of abbreviations in conjunction with military symbols should be avoided wheneverpossible; however, certain units cannot be adequately identified by symbols alone. In the followingcases, abbreviations as authorized by AR 320-50 or as shown in this manual are used:a. If a unit is designated by name rather than by number or letter, an abbreviation isnormally used. The placement of the abbreviation corresponds to the placement of a numericalor letter designation.Example: SCTY MP 301(Security Platoon, 301st Military Police Company)b. If a unit or installation is designated by letter or number but requires further identification because of a particular duty or purpose to which no appropriate symbol applies, theadditional information in abbreviated form is placed outside and below the basic symbol.2-20AGO 9142A

FM 21-30Example:FWD SPT45(Company A (Forward Support), 45th MaintenanceBattalion)c. An over-all headquarters is indicated by placing the abbreviation (short title) insidethe basic symbol. Above army group, size symbols are not shown.Example: SHAPE(Supreme Headquarters, Allied Powers, Europe)d. When no appropriate symbol is provided, the abbreviation of the duty performed maybe written inside the basic symbol.Example:2-21. NATIONAL DESIGNATIONCOLL(Prisoner of War Collecting Point, 6th Division)a. If necessary to designate the nation to which a unit or installation is assigned, the national distinguishing letters in brackets (parentheses) are written at the extreme right. Thenational letters pertinent to countries of the North Atlantic Treaty Organization are shown inSTANAG 1059, appendix III.XXExample:16 (US)(16th Infantry Division of the United States)b. Units, installations, and activities under national command and not assigned to a forcecomposed of allied nations may be indicated with the symbol /\ placed over the size• 1 * J- * * »indication.AGO 9142A 2-21

FM 21-30Example: 4 (US)(4th Infantry Division under the nationalcommand of the United States)Section V. U. S. UNIT SYMBOLS2-22. GENERALThe examples of military symbols in this section are applicable to current and proposed U. S.Army organizations. For reference purposes, each symbol is shown in detail; such detail, however, is not always required. Users are encouraged to consider their own particular needs and toreduce detail to essentials only. Within the division, for example, there is usually no requirementfor subordinate units to identify command echelons above the parent unit. As this section is pertinent to U. S. units only, the use of italics to indicate deviation from NATO-approved symbolshas not been followed as in other sections of the manual.2-23. DIVISIONAL UNITSThe initial unit examples under each division type show complete unit designations; theother examples are depicted as they are normally employed for intra-division use.a. Airborne DivisionSerial Military Symbol Unit DesignationXX8282d Airborne Division.Headquarters and HeadquartersCompany, 14th Airborne Division.Headquarters, DivisionArtillery, 82d Airborne Division.3-24/BBattery A, 3d Battalion (105-mm,towed) 24th Artillery, 14thAirborne Division.2-22AGO 9142A

FM 21-30Serial Military Symbol Unit Designation1 1- 81st Reconnaissance Squadron,(Airborne) 8th Calvary.3 ~32Company A, 3d Battalion(Airborne), 32d Armor.FWD COMMForward CommunicationsCompany, 5th Signal Battalion,(Airborne) .2d Military Police Company,(Airborne) .Division Support Command,101st Airborne Division.10 inHeadquarters, HeadquartersCompany and Band, 82dAirborne Division.11212212th Medical Battalion,(Airborne).10 12AIREQUIPXX101Air Equipment SupportCompany, 101st AirborneDivision.132d Battalion, Observation Post,508th Airborne Infantry.AGO 9142A 2-23

FM 21-30b. Armored DivisionSerial Military Symbol3124 AlXXCD 'iir~O MS/**^ —— ' /oIjl l55/8inl|X\ ./'N y /XX(X) - 54A£jr* ———— " ' ^^V _|x ——— \ /xx( ) 8-33/21^ ——— ^ CDUnit Designation1st Armored Division.1st Battalion, (155/8-in, SP) 18thArtillery, 4th Armored Division.1st Battalion (Mechanized), 54thInfantry, 3d Brigade, 2dArmored Division.Company A, 8th Battalion,33d Armor, 21st ArmoredDivision.5SPT ^Division Support Command,1st Armored Division.67 AVLBAIR8 MBL9 CMDOPS| |(Tn) ie/4^•••CW) 311•~. 161NT\ 8116th Engineer Battalion, 4thArmored Division.Armored Vehicle LaunchedBridge Platoon, Bridge Company,31st Armored Engineer" Battalion.Air Mobile Company, 16thAviation Battalion.Command Operations Company,81st Signal Battalion.10 HQ1°sFc 45Headquarters and MainSupport Company, 45thMaintenance Battalion.2-24 AGO 9142A

Serial Military Symbol Unit DesignationCD11 FLDo oi^^12 AfFM 21-301 1 Field Trains, 3d Tank Battalion,3-37 37th Armor.Company A (ForwardSupport), 45th Maintenance45 Battalion.rWD SPTc. Infantry Division12XXXX3 HH4 B56 GS7 T6T ACQX• ••111st Infantry Division.1st Brigade, 1st InfantryDivision.X 6i•III 105i imi•«•• ••AMortar Platoon, Headquartersand Headquarters Company. . ft/f x 1st Battalion, 16th Infantry,1 7 ' 1st Infantry Division.Battery B, 3d Battalion.XX (105-mm, towed) 7th3 — 7/8 Artillery, 8th InfantryX Division.611761st Engineer Battalion.General Support Company,17th Aviation Battalion.Aerial Surveillance and TargetAcquisition Platoon, 19thII Aviation Battalion.I */AGO 9142A2-25

FM 21-30Serial Military Symbol Unit DesignationADMHQSPTAtomic Demolition MunitionsPlatoon, 61st EngineerBattalion.Headquarters and SupportCompany, 513th MedicalBattalion.10AMB/A 513Ambulance Platoon, CompanyA, 513th Medical Battalion.11XAid Station, 2d Battalion,4th Infantry.d. Infantry Division (Mechanized)XX5th Infantry Division(Mechanized).Main Echelon, Headquarters,3d Infantry Division (Mechanized)./„ •"s,____^ri 50Headquarters and HeadquartersCompany, 1st Brigade,3d Infantry Division (Mechanized)./xx162/5Company B, 162d EngineerBattalion, 5th Infantry Division(Mechanized).3-83d Battalion (Honest John),8th Artillery.62-26835835th Supply and TransportBattalion.AGO 9142A

Serial Military Symbol7IACFT 262Unit DesignationFM 21-30Transportation AircraftMaintenance Company, 262dMaintenance Battalion2-24. NON-DIVISIONAL UNITSFor examples of combat service support units of the field army support command and communications zone see appendix IV.Serial Military Symbol Unit Designationa. Air Defense.xxxx1st Air Defense Brigade,7th Army.10th Air Defense Group,5th Corps.1-7/101st Battalion (Nike Hercules),71st Artillery,10th Air Defense Group.b. Armor.4th Armored Brigade(Separate), 6th Corps.xxxx14th Armored CalvaryRegiment, 7th Army.c. Artillery.Headquarters, 3d CorpsArtillery.6th Artillery Group, 7th Corps.2AGO 9142A2-27

FM 21-30Serial Military Symbol Unit Designation2-32/82d Battalion (8-in, SP), 92dArtillery, 8th Artillery Group.3-89/15'3d Battalion (175-mm gun, SP),89th Artillery, 15th ArtilleryGroup.d. Aviation.HH o Headquarters and HeadquartersCompany, 8th TransportationAviation Group.3d Medium Transport Company,(Fixed Wing), 19th TransportationAviation Battalion (see app. VI).8th Corps Aviation Company.119th Transportation HelicopterCompany (Heavy), 10thTransportation AviationGroup (see app. VI).e. Engineer.MlmCONSTIDP TRK/525/ XXX565th Engineer ConstructionGroup.525th Dump Truck Company,1st Corps.2-28 AGO 9142A

FM 21-30Serial Military Symbol Unit DesignationmPNL725th Panel Bridge Company,5th Engineer Group./XXXX35 / 9 35th Topographic Battalion,9th Army./. Special Forces.312 SFIIIDetachment 312, 5th SpecialForces Group (Airborne).Company C, 5th SpecialForces Group (Airborne).5th Special Forces Group(Airborne).AGO 9142A2-29

FM 21-3iCHAPTER 3MAP AND OVERLAY TECHNIQUESection I. SITUATION MAPS AND OVERLAYS3-1. GENERALSituation maps and overlays provide a rapid and easily understood means by which a commander or staff officer may express an operational plan, concept, or friendly or enemy situation.The combination of unit and weapon symbols with objectives, boundaries, routes of march, andother control measures creates an indispensable tool for quickly and accurately portraying battleactivity. Standardization of techniques is essential if tactical information is to be relayed withoutmisunderstanding. Guidelines for the pictorial representation of tactical situations are, therefore,established in this chapter.3-2. COLORSa. Colors in conjunction with military symbols denote the following:(1) Blue or Black — Friendly units, installation, equipment,and activities.(2) Red — Enemy units, installations, equipment,and activities.(3) Yellow —Friendly or enemy areas of chemical,biological, or radiological contamination.(4) Green — Friendly or enemy man-made obstacles.b. If other colors are used, a suitable explanation in the margin or legend is given.3-3. PRESENT AND PROPOSED LOCATIONSBasic unit and installation symbols are drawn with either solid or broken lines.a. A solid line represents a present or actual location.b. A broken line indicates a future or projected location.Examples:iXX -i(The location of an infantry battalion) (The projected location of the headquarter,.of an armored division)AGO 9142A

FM 21-303-4. DATE-TIME GROUPSDates and times such as the opening of an installation or the expected arrival of a unit ina new location may be written under or inside the symbol. Date-time groups are used:XXA r\Examples:09I430B(Present location of an observation post whichopened at 1430 hours, Time Zone B,the 9th of the month).3-5. PRECISE LOCATIONS10 I800A(Future location of the headquarters of aninfantry division which is scheduled to openat 1800 hours, Time Zone A, the 10th of themonth).To indicate locations more precisely, the following methods are employed:a. Basic symbols other than the headquarters symbol may be placed on a central staffwhich is extended or bent as required. The end of the staff indicates exact location.Examples:Qb. Since the headquarters symbol already includes a staff, this staff may be extended or bentas required. The end of the staff extension indicates the exact location of the headquarters.Example:\c. If a group of units or installations other than headquarters are at one location, thegrouping of symbols may be inclosed with a bracket and the exact location indicated with a staff.Example:OAd. If several headquarters are at one location, more than one symbol may be placed ona single staff.Example:3-2 AGO 9142A

3-6. TASK FORCESFM 21-30Units forming a temporary grouping may be shown under one command by use of a bracket.IExample:(An armored battalion task force formed by two tank companies, one mechanized infantrycompany, one armored engineer platoon, and one aviation section)3-7. ENEMY FORCESa. In general, the symbols shown in this manual are adequate for depicting both enemyand foreign units, weapons, equipment, and activities. When representing unorthodox units andequipment, the most appropriate symbol contained herein should be selected.b. If only one color is available, enemy symbols are outlined with doufile lines.XXExamples:(Enemy infantry division) (Enemy observation post)c. A question mark used in conjunction with an enemy symbol indicates unknownor unconfirmed information. The position of the question mark shows what informationis unknown or unconfirmed.Examples: 11(All information shown is unconfirmed)(The size of the enemy infantry unit is_ (The unit designation of the enemy tank(The type of enemy regiment is unknown) battalion is unknown)d. On enemy situation maps and overlays, a date-time group indicates the time theincident or event occurred or the unit or installation was reported.AGO 9142A

FM 21-303-8. FRONT LINESa. Front lines are marked by a series of lines which curve away from opposing forces.If only one color is used, enemy front lines are represented by double lines.Example:b. Thinly held or patrolled parts of the lines are marked as a series of dots. If only onecolor is used, thinly held enemy lines are represented by open dots. The dots do not indicatestrength or location of patrols.Example:O O O O O O O3-9. OBJECTIVESObjectives and intermediate objectives are inclosed and identified by the abbreviation OBJand a number, letter, code name, or unit designation.Examples:OBJ( 2-I6INF /X*^-—-—^3-10. ASSEMBLY AREAS (UNDEFENDED AREA)a. Assembly areas are inclosed and the unit symbol is placed in the center. Proposedassembly areas are shown with broken lines.Examples:r-—, .JELI {( )J3-33/\ ——————J ^(Assembly Area, Task Force, 3d Tank (Proposed Assembly Area, Task Force,Battalion, 33 Armor) 3d Tank Battalion, 33 Armor)b. If an area is allocated to a group of units, it is often convenient to displace theunit symbols.Example:3-4 AGO 9142A

3-11. ATTACK POSITIONSFM 21-30Attack positions are inclosed by a line with the abbreviation ATK and unit designationplaced in the center.Example:(Attack position, A Company, 2d Battalion, 18th Infantry)3-12. DEFENDED AREASIf an area is occupied and defense of the area is prepared, a line including the size symbolof the defending unit incloses the area; the closed side of the symbol is oriented toward themost likely enemy threat. If desired, the military symbol of the defending unit may be enteredin the center of the inclosed area.Examples:(Defensive area, 2d Platoon, C Company, Proposed (Defensive area, B Company,1st Battalion, 6th Infantry) 3d Battalion, 52d Infantry)3-13. MISCELLANEOUS AREASUnit symbols may be placed within the designated areas in examples a through e below toindicate unit assignment.Examples:BHDc. Marshaling Areas. ^—•—'•"—^

FM 21-303-14. LATERAL BOUNDARIESBoundaries are marked by a solid line with the size indication of the unit shown atconvenient intervals. The designations of units supplemented by arm or branch and nationaldesignation, if necessary, are placed on either side of the size indication. If a lateral boundaryseparates units of unequal size, the symbol for the larger is used.Examples:x 3DIVxI x 2XX I4ARMD CAV(Boundary separates 1st Corpsand 3d Division)3-15 REAR BOUNDARIES(Boundary separates 1st and2d Brigades)(Boundary separates 3dDivision and 14th ArmoredCavalry Regiment)If a rear boundary is shown, the size indication along the boundary corresponds to thesmaller unit or, in other words, to the commanded unit and not the commanding unit. Arm orbranch and nationality of units are shown when required to prevent confusion.Examples:4314 ARMD CAVxx-5 CORPS(Rear boundary separates 43d Divisionand 5th Corps)Ml5 CORPS(Rear boundary separates 14th ArmoredCavalry Regiment and 5th Corps)3-16. PROPOSED BOUNDARIESFuture or proposed boundaries are shown with broken lines and are labeled to indicate dateand time or condition of effect and the headquarters establishing the boundary.Example:TF 2-68 EFFII —— —— —— ONTF 2-69 BDE 03-17. INFILTRATION LANEAn infiltration lane is bounded by two solid lines and with the words INFILTRATION LANEand the designation of the infiltrating unit in the center.Example:AGO 9142A

3-18. AXIS OF ADVANCEFM 21-30a. An axis of advance is normally assigned a code name or unit designation. The openarrow indicates the general route to be followed. A proposed axis of advance is shown in brokenlines and labeled with the time or condition when effective. The point of the arrow touchesthe objective.Example:b. To differentiate between a ground axis of advance and an air assault axis of advance,a twist is placed in the shaft of the open arrow symbolic of a propeller.Example:(Air Assault Axis of Advance)3-19. DIRECTION OF ATTACK AND ROUTES OF MARCHA direction of attack arrow is not labeled. Routes of march (advance, withdrawal, mainsupply, etc.) however, are labeled with their purpose and code name or unit designation.The arrow follows the specific route.Example:ROUTE OF MARCH, 3-52 INF3-20. CONVOYSa. Convoys of vehicles are represented by an arrow in the direction of movement; thepoint of arrow indicates the location of the head of othe column.Examples:(If the convoy is halted, the arrow is shownfacing toward the rear of the column)b. This symbol may be shown with the appropriate vehicle symbol to indicate the typeand number of vehicles in the column. Likewise, the date and time may be added.Example:!2ffl250925H(A column of 12 medium tanks at 0925 Zhours on the 25th)AGO 9142A

FM 21-303-21. CONTROL LINESLines of control or coordination are drawn and labeled as shown below.Serial Explanation1 fT'i/yi £> ^'i/iTn/i'y*^ f* fifi'vrJ'i'y) fif^i/ivi T ^MOFSCLSymbolFSCL2 Line of Departure(a) Line of Departureis present positions(b)Line of Departure is forwardfriendly dispositions3 Phase line with code nameLDisPPosisFFDPL GREENLD^LDisPPos^LDisFFDPL GREENi. V If " tfi t> LJvlW5 Probable line of devloi/mentNFI_ _ ________ ---NFLPI n__ __ ___ .._ DI n3-22. CONTROL POINTSControl points are drawn on the selected terrain feature and identified as shown below.Serial Explanation and Remarks Symbol1 A check point consists of a circleinclosing a selected terrain featurewith a number placed inside the circle2 A coordination point is shown by drawing a circle on the selected terrainfeature and placing an "X" in thecenter. Coordination points are usedin conjunction with boundaries todesignate defensive areas.Examples:FEBA FEBACOP COPForward Edge of theBattle Area.Combat OutpostFEBA FEBATrace of the ForwardEdge of the Battle Area.GOP GOPGeneral OutpostAGO 9142A

Serial Explanation and Remarks Symbol3 Contact points are drawn as a squarewith the contact number placed inside. 5Linkup points are drawn as an opencircle with the number to the rightand a dot in the center.Release points are shown as'shadeddots with the designation RP tothe right.Start points (Initial Points) are shownas shaded dots with the designation"SP" to the right.3-23. ACTIVITY SYMBOLS0RPSPFM 21-30Sometimes, it is necessary to depict military activity on situation maps or overlays. Thisis often the case when graphically describing enemy situations. The following symbols, whichmay be used together with other military symbols, are used to represent the more common formsof troop activity (fig. 3-3).Serial Explanation of Symbol Symbol RemarksAmbushFirefightHarassing FirePoint of arrow atmap locationPoints of arrowsat map locationPoint of last arrowat map locationPropagandaat map location of incidentMouthpiece of megaphoneSolid arrow indicates lastknown unit position.MovementBroken arrow indicatesprobable direction ofmovement.Phony (dummy) \ \Normally placed overreferred symbolDestroyedSuperimposed overreferred symbolAGO 9142A 3-9

FM 21-30Section II. FIRE PLAN OVERLAYS3-24. GENERALA tactical plan for using the weapons of a unit so that fires will be coordinated is known asa fire plan. Fire plans normally are prepared and submitted in overlay form. Standardization ofoverlay techniques is essential to insure that misinterpretations of fire plan symbols do not occur.3-25. FIELD OF FIREa. Representation of a field of fire (arc of fire) of a direct fire weapon is shown by twobroken arrows.Example :(Field of fire)b. A weapon symbol is normally used in conjunction with the symbol for a field of fire.The base of the symbol indicates the weapon's position.Example : >^3-26. DIRECTION OF FIRE(The field of fire of a heavy machine gun)a. A fixed line of fire is represented by a solid arrow. To prevent confusion with similarsymbols, the symbol representing a fixed line of fire is always shown together with theappropriate weapon symbol.Example:(Fixed line of fire for a medium tank)6. Symbols for fields of fire and fixed lines of fire are often combined.Example :3-10(Field of fire and fixed line of fire for a light machine gun)AGO 9142A

c. The field of fire, automatic weapon, and fixed line of fire symbols are combined toindicate final protective lines: Heavily shaded portions along the fixed line of firesymbol indicate areas of grazing fire.FM 21-30Example:(Final protective line for a heavy machine gun)3-27. CONCENTRATION AND BARRAGESa. Friendly concentrations are normally identified by letter prefix and number. Additionally, concentrations may be labeled to show the type of target, type of weapon and fires,duration and time of fires, and the unit designated to fire the mission.Examples:DA65(Concentration) (Alternate method)b. Barrages are usually plotted to scale and shown as a rectangle. The unit designatedto fire the barrage may be indicated inside the rectangle.Example: A/2-5105(105-mm barrage to be fired by Battery A, 2d Battalion, 5th Artillery)3-28. PLANNED NUCLEAR FIRESPlanned nuclear fire is indicated by a "tick mark" considerably larger than the symbolused to denote concentrations of conventional weapons. The dot shows the exact location of thedesired ground zero. Additional information may be included as shown below.(Height of Burst)(Requesting Unit oridentifying number)Example:(Firing Unit anddate/time to beexecuted)(Yield a/o type ofweapon)AGO 9142A3-11

FM 21-303-29. AREAS OF FIRE AND CONTAMINATIONSerial Explanation of Symbol Symbol RemarksGeneral symbol todenote indirect fires.The area inclosed bythe symbol indicatesthe approximate areaof fire.Area either screenedor to be screened bysmoke.Enemy fire is shown RED oroutlined with a double line;friendly fire is shown in BLUEor BLACK.Date and time may be added.SMOKE10 0700-07302Area subjected to HEbombing from the air.Other types of fire are similarlyshown. For example: Air-to-Surface Missile (ASM) orSurface-to-Surface Missile(SSM).Biologically (BIO) orchemically (G)contaminated areas.The symbol is shown in yellowand the letters G or BIOare written in the center.Radioactive areaBF 0700EF I 130-/yThe intensity expressed inrad/hr may be shown insidethe triangular signs of theiso-intensity curve. The timesof the beginning (BF) andend (EF) of radioactive falloutmay be shown in a rectangularbox as part of the symbol.AGO 9142A

FM 21-303-30. NUCLEAR DETONATIONSa. A nuclear detonation is representedby a mushroom; thebaseof the stem indicates the postion of ground zero.Examples:6. Inside the segment representingthe mushroom head are shown the yield (KTor MT) and the date-time group of thedetonation. When not accurately known, theyield is shown between brackets.c. The height of burst is shown in metersalong the left side of the stem. If notaccurately known, the approximate heightshould be shown. (HIGH, LOW, SURFACE,UNDERGROUND).LOW(50 KT)d. The direction of the prevailing windblowing between the ground and the maximumheight of the nuclear cloud may be shown byan arrow pointing away from ground zero.I5KT\f280800Z\500e. If the mushroom is known to befallout producing, the stem of the mushroom is shaded./. Proposed nuclear detonations may beshown in a similar manner by the use ofbroken lines.g. The boundaries of areas damaged invarious degrees may be shown by concentriccircles with ground zero as center.h. Normal colors for friendly (BLUEor BLACK) and enemy (RED) detonationsare used. If only one color is available, enemynuclear strikes may be indicated by the useof double lines for the mushroom head./I0KT\^500 600Z\SURFACE\ /\ /VAGO 9142A 3-13

FM 21-303-31. ATOMIC DEMOLITION MUNITIONS (ADM)Symbols for atomic demolition munitions are shown in GREEN (color for obstacles) andconform to the symbols outlined for nuclear detonations in paragraph 3-30 with the addition ofthe abbreviation, ADM, labeled across the top of the mushroom. If the detonation is underground, the minus number of meters below the surface, or, if unknown, the word UNDER-GROUND is placed to the left of the mushroom stem. SURFACE detonations require no additional identification. A planned ADM is shown in broken lines. A prepared ADM is shown withthe mushroom head in solid and the stem in broken lines; the date and time or conditions ofexecution are placed in the mushroom head. An executed ADM is shown completely in solid lines.Example:(IN GREEN)(A prepared atomic demolition munition,1 KT, 5 meters underground, falloutproducing, to be executed on order of theCommanding General, 5th Division)3-14 AGO 9142A

FM 21-30APPENDIX IREFERENCESAR 320-5AR 320-50FM 5-30FM 5-31FM 5-36FM 6-20-1FM 6-20-2FM 7-24'FM 17-1FM 17-70FM 21-5FM 21-6FM 21-26FM 21-31FM 24-16FM 24-18FM 24-20FM 30-5FM 30-10FM 55-30FM 61-100FM 101-5FM 101-10DA Pam 108-1Dictionary of United States Army Terms.Authorized Abbreviations and Brevity Codes.Engineer Intelligence.Use and Installation of Booby Traps.Route Reconnaissance and Classification.Field Artillery Tactics.Field Artillery Techniques.Communications in Infantry and AirborneDivisions.Armor Operations.Communications for Armored Units.Military Training.Techniques of Military Instruction.Map Reading.Topographic Symbols.Signal Orders, Records and Reports.Field Radio Techniques.Field Wire and Field Cable Techniques.Combat Intelligence.Terrain Intelligence.Motor Transportation, Operations.The. Division.Staff Officers' Field Manual; Staff Organizationand Procedures.Staff Officers' Field Manual; Organizational,Technical and Logistical Data.Index of Army Motion Pictures, Film Strips,Slides and Phono-Recordings.AGO 9142A 1-1

APPENDIX IIFM 21-30PROVISIONS OF NATO STANDARDIZATION AGREEMENT 2019(2d EDITION)II-l. U. S. MODIFICATIONSThe provisions of the Standardization Agreement Number 2019 (edition No. 2) dated 1October 1962 have been incorporated and are applicable to this manual. Additional U. S. symbolsand modifications to the STANAG are identified throughout the text and appendixes by italictype. When cooperating with other nations of NATO, care should be taken that symbols peculiarto the .United States are adequately explained in an accompanying legend. Furthermore, in suchcircumstances, the symbol definitions approved by STANAG 2019 apply. U. S. Modifications toSTANAG 2019 are shown below.REFERENCESTANAG 2019 STANAG DEFINITIONSREFERENCEFM 21-30para lO.f.A logistical unit within a logistical chain ofcommand may be represented by:para 2-4/.para lO.g.A logistical command headquarters within alogistical chain of command may berepresented by:para 2-40.para lO.a.para 17.f. (1)Blue — For friendly units, installationsand activities.When numbers, letters, names or abbreviations are used to designate a unit, installationor activity the first one of them — i.e. the unit'sown designation — must be in accordancewith the size symbol. The designation maybe placed entirely on the left, entirely on theright, or partly on the left and partly on theright side of the symbol, e.g.para 3-2.para 2-17.3/A/4343 A/433/A/43AGO 9142A(3d Platoon, A Company, 43d Infantry Battalion)II-l

FM 21-30para 17.f. (2) If there is a break in the chain of command Parathe appropriate size symbol must be placedover the first echelon given after the break, e.g.201(201st Military Police Company, 3d Corps)II-2. BRANCH SYMBOLS OF ALLIESService, arm, branch, and duty performed symbols peculiar to certain NATO nations areshown below.Serial Branch Nations Symbol Explanation1 OrdnanceUK, CAShield and crossed weapons2 GendarmerieBE3 GendarmerieFRBomb with flare4 Headquarters units GE, FR5 Supply units GE, FR6 MixedGE7 HeavyGE8 MediumGEII-2 AGO 9142A

FM 21-30Serial Branch Nations Symbol Explanation9 Traffic regulation UK10 TrainGE11 MedicalTU CrescentII-3. NATO UNIT SYMBOLSExamples of military symbols applicable to NATO Forces as extracted from ANNEX I,STANAG 2019 (2d edition) are shown below.Serial Symbol Unit DesignationHeadquarters, Commander inChief, Central Europe(UK)8th Army (UK)KNL)Headquarters, 1st Corps (NL)MANTOVA(IT)Mantova Infantry Division(IT)32m xxxxIHeadquarters, 32d EngineerBrigade, 1st ArmyAGO 9142A II-3

FM 21-30Serial Symbol Unit Designation6 5/3/xxx7 1/6XXX•5th Brigade, 3d InfantryDivisionHeadquarters, 1st ArtilleryBrigade, 6th Corps8/xx2,/^nrnXnmCDP/l | B Regimental Combat Team,0/ ' ' llth Division21st Armored RegimentalCombat Team, 1st InfantryDivision103/163/163/6X1!X1 11 1M*^QUO >.XX 3d Infantry Battalion, 16th£g Regiment, 2d Infantry Division3d Armored Infantry Battalion,£ 16th Armored Regiment, 2d In-X fantry Division.3d Armored Infantry BattalionXX (wheeled armored vehicles),^ 16th Regiment, 2d InfantryDivision.23/1*5*ixi /XX14 32/1 I(m)1 1m23d Engineer Battalion(wheeled armored vehicles),15th Division.32d Engineer Battalion (notarmored) , 51st ArmoredDivision.II-4 AGO 9142A

FM 21-30Serial Symbol Unit Designation15Headquarters, 301st ArmoredBattalion Combat Team, 2dArmored Division16A Company, 31st Reconnaissance Battalion, 31st InfantryDivision173d Mountain EngineerCompany, 3d MountainBrigade182d Signal Platoon, 64thInfantry Regiment19in21Observation Post of 21stArtillery Regiment20Air observing unit equippedwith radio213d Armored DivisionalArtillery224th Infantry DivisionalArtillery (U. S.)23Non-armored Artillery, 3dArmored DivisionAGO 9142AII-5

FM 21-30Serial Symbol Unit Designation243d Armored DivisionalArtillery (regimental size)25xx3d Armored DivisionalArtillery Officer266th Airborne DivisionalArtillery277th Mountain DivisionalArtillery288th Corps Artillery29Signal Officer, 43d InfantryDivisionXX45mEngineer Officer, 43dInfantry Division31531EVAC531st Evacuation Hospital,4th Army32902DEP902d Ordnance Depot,7th Army33II-6106DEPDepot Bridge Material Operatedby 106th Engineer Battalion,1st ArmyAGO' S142A

FM 21-30Serial Symbol Unit Designation34XX-Main Headquarters, 43rdInfantry Division.3543MAINXXRear Headquarters, 43dInfantry Division.REAR36Signal Center 43dInfantry Division.CENTER37Message Center.MSG CENTER38Antiaircraft operationscenter.39Joint Army-Navy antiaircraftoperations center.404142CONTROLCENTER?/xxxx\ 4xxControl Center of the8th Light AntiaircraftBattalion.Traffic Control Headquarters,4th Army.No. 3 Traffic Control Post,4th Infantry Division.AGO 9142A II-7

FBI 21-3®APPENDIX HINATIONAL DISTINGUISHING LETTERS FROMSTANAG 1059The following National Distinguishing Letters will be used whenever it is necessary to useabbreviations in staff work and communications including publications, documents, communications, orders or other media, to identify a NATO Nation or any part of NATO Armed Forces: * 2BelgiumCanada CADenmarkFranceGerman Federal Republic GEGreece GEIceland 1CItaly ITLuxembourg LUNetherlands NL *Norway NOPortugal POTurkey TUUnited Kingdom UK 5United States1 When used to identify a National Force or component of a National Force the Distinguishing Letters willbe bracketed immediately following the Force, formation, or unit number.Examples: 12th (US) Army Group5th (FR) Armored Division6th (NL) Infantry Brigade5th (IT) Infantry Regiment2 National Distinguishing Letters for components of Army Forces smaller than a division will only be usedwhen this is necessary to avoid confusion.3 The National Distinguishing Letters for Canada will not be used to identify Canadian Army formationswhich have the word "Canadian" in their official designation.1 The substitution of NL for NE for the Netherlands in Allied Publications will be phased.5 The letters UK denote the United Kingdom, or a force or part of a force provided solely from the UnitedKingdom. The letters BR may, however, be used in special cases to denote a force comprising units or elementsof more than one country of the British Commonwealth.AGO 9142A III—1

FM 21-30APPENDIX IVLOGISTICAL INSTALLATIONS, UNITS, AND PIPELINESIV-I. LOGISTICAL AND MEDICAL INSTALLATIONSMilitary symbols of logistical and medical installations are shown below.Serial Designation SymbolAmmunition — any typeAmmunition — Air ForceAmmunition — Army AviationAmmunition — ArtilleryAmmunition — rocket and guidedmissileAmmunition — specialAmmunition — small armsFood SuppliesGraves serviceAGO 9142A IV-1

FM 21-30Serial Unit Designation Symbol1011Hospital, aid station (NOTE: Verticalmarks are placed on Geneva cross todistinguish symbol from a coordinationpoint: See Chapter 3.)Petroleum, oils and lubricants12Petroleum, oils and lubricants -Air Force13Petroleum, oils and lubricants -Army — Aviation14Solid fuel15Repair parts16Topographic17Traffic18192021WaterParkingClass II and IVCollecting points:a. Civilianb. Prisoner of warc. SalvageeoCIV^*—*sCOLL(PW)COLLLV)COLLIV-2 AGO 9142A

FM 21-30IV-2. PIPELINESPipelines for refined petroleum products (indicate size in inches, if required) are shown as:a. One line6. Two linesc. Three linesd. Submerged (one line)IV-3. FIELD ARMY SUPPORT COMMAND UNITSQO QOJ2——Q.OCJU QUO OOPa. Combat service support units assigned to a field army support command are readily identified by their distinctive basic symbol:b. A headquarters or headquarters echelon of a combat service support unit of a Field ArmySupport Command is represented by:c. Military symbols to represent combat service support units with the exception of theirbasic symbol are developed in accordance with the standard system of symbolic notation outlined in chapter 2. Because of the many functionalized units within a field army support command; vehicle symbols (para 2-14), aircraft symbols (app. VI), and logistical installations symbols (para IV-1) are combined with branch of se rvice and duty performed symbols (para 2-7and 2-8) when necessary to fully describe each unit under consideration.d. Examples of combat service support units and installations within a field army supportcommand are shown below. In some examples, higher echelons of command above the parent unitare depicted in order to show the prescribed method of indicating • these higher echelons whenrequired. As the symbols below depict U.S. units only, the use of italics to indicate deviationfrom NATO approved symbols has not been followed as in other sections of the manual.AGO 9142A IV-3

FM 21-30SERIAL MILITARY SYMBOL UNIT DESCRIPTION7th Field Army Support CommandSPT 1818th Airborne Corps SupportCommand (COSCOM) (SEPARATE)

FM 21-30SERIAL MILITARY SYMBOL UNIT DESCRIPTIONI[Si < 782/562DS782d Special Ammunition Company(Direct Support), 562d AmmunitionBattalion943/4DSAmmunition Supply Point Number 3operated by the 943d AmmunitionCompany, 4th Ammunition Battalion(Direct Support)10xxxxDPU< 21/7 21st Data Processing Unit, 7thField Army Support Command11IITYPE E61st Civil Affairs Command (TypeE)12FWD10/2710th Medical Group (Forward),27th Medical Brigade13 34/5CLR34th Medical Clearing Company,5th Medical Battalion14 64AMB64th Medical Air AmbulanceCompany, (Helicopter Equipped)AGO 9142A IV-5

FM 21-30SERIAL MILITARY SYMBOL UNIT DESCRIPTION1588th Evacuation Hospital.EVAC16MPXHeadquarters, 3d Military PoliceBrigade.17 MPESC GD34th Military Police Escort GuardCompany1819CAGEXXX X345/7IIxxxxREPL< 4004/77th Field Army Prisoner of WarCage operated by the 345thMilitary Police Company4004th Replacement Battalion, 7thField Army Support Command20 /44 44th Transportation Brigade.IV-6AGO 9142A

FM 21-30SERIAL MILITARY SYMBOL UNIT DESCRIPTION21MCCIII(XXX7th Field Army Support CommandTransportation Movements ControlCenter.22*®*

FM 21-30SERIAL MILITARY SYMBOL UNIT DESCRIPTION28 HH RSHeadquarters and HeadquartersCompany, 42d Army Rear SupportBrigade.29 TT-0

FM 21-30SERIAL MILITARY SYMBOL UNIT DESCRIPTION35IIIDS —CLTGS81st Light Equipment MaintenanceCompany (General Support).AGO 9142A IV-9

FM 21-30SERIAL MILITARY SYMBOL UNIT DESCRIPTION423d General Support (Maintenance)Aircraft Company.GS43 CCS8th Collection, Classification, andSalvage (CCS) Company.44902d Division Maintenance SupportCompany.45 psllth Personnel Service (PS)Company, 44th TransportationBrigade.IV-10 AGO 9142A

FM 21-30IV-4. COMMUNICATION ZONE UNITSa. Combat service support units within the communications zone unless part of a fieldarmy support command are represented by—b. A headquarters of a combat service support unit within the communication zone is represented by—c. Below division equivalent and with the exception of the basic symbol, combat serviceunits within the communication zone are developed in a similar manner as described for combatservice support units of the field army support command (para IV-3).d. Size indication, however, designating boundaries and headquarters of communicationzone elements of division or higher equivalent are shown as follows:(1) 00 Area Command (ACOMD) or logistical command (LOGCOMD) subordinate to an advance or base logistical command.(2) 000 Advance logistical command (ADLOG), base logistical command (BA-LOG), and area command of a communication zone.(3) 0000 Theater army logistical command (TALOG) and theater army civil affairscommand.(4) 00000 Theater rear boundary when the theater army logistical command is notthe same as the theater rear boundary.e. Examples of logistical command headquarters are shown below.AGO 9142AIV-11

FM 21-30Serial Military Symbol Designation0 0ACOMDHeadquarters, area command subordinate toan advance or base logistical command.000NADLOG { 122000Headquarters, Northern Advance LogisticalCommand with the 122d Logistical Commandas command headquarters.BALOG000ACOMD0000} METALOG121110Headquarters, Base Logistical Command with121st Logistical Command as the commandheadquarters.Headquarters, Area Command with the110th Logistical Command as commandheadquarters.Headquarters, Middle East TheaterArmy Logistical Command.TV-12AGO 9142A

FM 21-30APPENDIX VFORTIFICATION AND OBSTACLE SYMBOLSV-l. FORTIFICATION SYMBOLSSerial Fortification Symbol Remarks1 Weapon slit, foxholeor emplacementOther symbols and numbersmay be added,Example:tTwo emplacements of lightmachine guns.Emplacement of a fourbarreledheavy machine gun.3 2 Three foxholes for two men.2 Any trench system3 Trench with firing bays1_4 Dug-out5 Surface shelter(above ground)6 Underground shelter7 Pill box or casemateAGO 9142A V-l

FM 21-30Serial Fortification Symbol Remarks8 Strong pointMay be combined with sizesymbol. Example:V-2. SYMBOLS FOR OBSTACLES OTHER THAN MINESSerial Obstacle Symbol Remarks1 Demolished area2 Tank obstacle, typeunspecifiedUsed if the type of obstacleis unknown or cannot beclassified under the otherobstacles given in this table.3 Tank wall or bank4 Tank ditchThese symbols may be combined to denote the obstacleconsisting of more than onetype. Example:A tank obstacle consisting ofditch, wall, and stakes.V-2 AGO 9142A

FM 21-30Serial Obstacle Symbol RemarksTank ditch coveredStakes, or rails orsimilar obstacles7 Tetrahedron, dragons'teeth and other similar obstaclesa. FixedNumbers placed between theseindicate number of obstaclesand number of rows:10_xxxxFour rows of ten obstaclesin each rowb. Fixed and prefabricatedc. MovableAAd. Movable andprefabricatedRoad blocks, craters,and blown bridges:The center of the symbolindicates the position of theblock.a. Proposedb. Prepared butpassableAGO 9142AV-3

FM 21-30Serial Obstacle Symbol Remarksc. Completed9 Wirea. Type unspecifiedX X XX Xb. Concertina, singlec. Concertina, multipled. Single fencee. Double fencef. Double apron fenceg. Low wire fence•** XXXXX XX XXxxxxxxxxX X X X XThese symbols cannot be confused with boundaries ifGREEN is used. If no greencolor is available, they shouldbe labeled "wire" to avoidpossible confusion.h. High wire fenceXXX X10 Tripwire11 a. Inundation Color: BLUEV-4AGO 9142A

FM 21-30Serial Obstacle Symbol Remarksb. UnderwaterobstacleColor :BLUE between lines.Submerged obstacles or minefields should be shown in thecenter of the symbol, and ifpossible, in GREEN12 Aircraft or antiairborneobstaclesV-3. SYMBOLS FOR MINESExplanation ofSerial Symbol1 Mines, type unknownSymbol(DRemarks2 Mines, antipersonnel3 Mines, antitankMines, antitank,boobytrapped •Double antitank mines0Serials 5 to 8 are normallyonly used for detailed recordsof minefields.6 Boobytrapped doubleantitank minesAGO 9142A V-5

FM 21-30Explanation ofSerial Symbol Symbol RemarksBoobytraps8 Antipersonnel minesconnected to tripwireRow of antitank minesSerials 9 and 10 are used whenmines are laid in a definite row.10 Row of antipersonnelmines11 Cluster of mines12 Minefielda. Minefield of 400mixed antitank andantipersonnel minesb. Minefield of 600antitank mines13 Boundaries400Used when a series of rows arecombined in a definite patternto form a minefield. Boundariesare drawn to scale to indicatethe actual extent of the field.The number in the rectangleindicates the actual totalnumber of mines. Type of mineis indicated by appropriatesymbol.a. Unfenced antitankminefieldb. Unfenced withtype of minesunknownV-6 AGO 9142A

FM 21-30Explanation ofSerial Symbol Symbol Remarks14 Gaps or lanesa. A belt of 600 mixedantipersonnel minesand double antitankmines, some ofwhich are boobytrapped.A gaptraverses this belt.\ // \b. A belt of 400 antitank mines, some ofwhich are boobytrapped.A gaptraverses this belt.15 Toxic chemical (-JQminefieldsHD TyPe °f toxic agent is shownon outside of symbol.16 Mixed antitank, antipersonnel, andchemical toxic mines.HDTripwire or boobytrap symbolsadded as needed.V-4. MISCELLANEOUS SYMBOLSa. The following symbols may be used in conjunction with other symbols:(1) / \ Phony (dummy) (normally placed overs \ symbol)* N(2) Destroyed (superimposed over symbol)AGO 9142AV-7

FM 21-30(3)? •Unconfirmed, unknown(4)(5)UCuUnder constructionUnoccupiedExamples:b.MA/ \Phony (dummy) minefield fenced(2)X Destroyed emplacement/ o \Unoccupied strong pointUC_II__ Trench system under constructionAGO 9142A

FM 21-30APPENDIX VIAVIATION SYMBOLSSerial Explanation of Symbol Symbol Remarks1 Fighter C$02 All-weather fighter3 Bomber o|o4 Drone aircraft5 Fighter-bomberReconnaissanceaircraft7 Light weight (strike)reconnaissance8 TransportNOTE: The symbols shown denote air force aircraft, landing facilities, etc. To denote navy,army, or marine aviation, the appropriate symbols are used.AGO 9142A VI-1

FM 21-30Serial Explanation of Symbol Symbol Remarks9 Rescue ojoD10 AntisubmarineaircraftOKD11 Light fixed wingaircraft12 Tactical light weightstrike fighter13 Seaplane14 Helicopter OiO15 Helicopter, transport16 Aircraft patrol17 Landing areasa. Airfieldc•oo-The point of the symbol denotesthe exact location. The conventional signs used onaeronautical maps will beused for permanent landing fields.To show unit designation, unitsymbols are combined withlanding area symbols.Example:b. Landing strip(Helicopter landing area,20th Armored Division)VI-2 AGO 9142A

Serial Explanation of Symbol Symbol RemarksFM 21-30c. Seaplane stationd. Helicopterlanding area18 Communicationscheck point19 Balloono20 Revetment for aircraftI oo21 Searchlight22 Weather station23 Target area or targetconcentrationTGTUse P, S, and LR toqualify target type: P —primary; S — secondary;LR — last resort.24 Prohibited flying area —PROHIBITED'25 Restricted//////////RESTRICTED/'////////'AGO 9142A VI-3

FM 21-30Explanation ofSerial Symbol Symbol Remarks26 Rally point00 RALLYPropeller or jet symbol incircle; point of arrow indicateslocation.27 Rendezvous pointRDVU28Vulnerable pointair defense29Vulnerable area30 Gun defended area31 Inner artillery zoneGDAIAZUse letters A, B, and Cunderneath to show:A. Zone prohibited to friendlyaircraft.B. Zone in which restrictionsare normally inforced on aircraft and gunfire.C. Friendly air have completefreedom of action.32 Flight route33 Air control point34 Air control line ACL -ACLAGO 9142A

FM 21-30APPENDIX VIICOMMUNICATION SYMBOLSThis appendix does not include symbols for signal diagrams. It merely gives those symbolswhich may be required for general use. The folkwing symbols may be combined with other military symbols or annotated to show their detailed function and type:Serial Explanation of Symbol SymbolMicrophones(Remark: This symbol may be usedfor sound ranging microphones.Each quadrilateral of the symbolindicates a microphone.)Radar stationRadio/wireless stationRadio/wireless station (dummy)Radio direction finder stationAGO 9142A VII—1

FM 21-30Serial Explanation of Symbol Symbol6 Radio intercept/monitoring station7 TelevisionNAAA/V8 Visual stationa9 Radio relay station10 Signal centerCEN11 Message centerMSG CEN12 Telephone switching central not ata headquarters or headquartersechelon13 Telephone switching central at aheadquarters or headquartersechelon14 Teletypewriter facilities TVII-2 AGO 9142A

FM 21-30Serial Explanation of Symbol Symbol15 24-channel radio relay system16 12-channel radio relay systemvyvXXSIG 2017 Area signal center the number onthe right side of the staff indicatesthe unit). (Unit's code name andnumber are placed within the circle.)IROBO 12)18 Telephone o19 Wire circuit, indicating number ofpairs available20 Radio/wire integration station, FM21 Multichannel cableNOTE: For special symbols used in signal diagrams, line route maps, traffic diagrams, andsignal operations maps, see FM 24-20.AGO 9142AVII-3

FM 21-30By Order of the Secretary of the Army:Official:J. C. LAMBERT,Major General, United States Army,The Adjutant General.HAROLD K. JOHNSON,General, United States Army,Chief of Staff.Distribution:Active Army:DCSPER (2)ACS! (2)DCSOPS (2)DCSLOG (2)CORC (2)ACSPOR (2)CRD (1)COA (1)CINFO (1)TIG (1)TJAG (1)TPMG (1)OPO (2)TSG (1)CofEngrs (5)USAARMBD (5)USACDCIA (10)USACDCINTA (10)USACDCCBRA (5)USACDCCARMSA (5)USACDCARMA (4)USACDCARTYA (6)USACDCAVNA (2)USACDCADA (2)USACDCTA (5)US,ACDCQMA (3)USACDCMSA (2)USACDCMPA (5)USACDCOA (2)USACDCSWA (2)USACDCCEA (25)USACDCEA (25)USCONARC (10)USAMC (15)USACDC (10)ARADCOM (10)ARADCOM Rgn (10)OS Maj Comd (5)LOGCOMD (5)MDW (1)Armies (25)Corps (15)Div (10)Div Arty (5)Bde (5)Regt/Gp (5)Bn (5)Co/Btry (2)PMS Sr Div Units (5)PMS Jr Div Units (5)PMS Mil Sch Div Units (5)USATC (10)Joint Sch (15)AMS (10)Br Svc Sch (20) exceptUSAAVNS (5)USASWS (34)USATSCH (15)USAOC&S (5)USAOGMS, (5)USACDCCSSG (10)USACDCCAG (10)USACDCSWCAG (5)USACDCIAS (1)USACDCCEC (5)USACDCNG (5)USACDCCCISG (1)MAAG (2)Mil Msn (2)NG: State AG (3); Units—same as Active Army except allowance is on (2) two copies to each unit.USAR: Units—same as Active Army except allowance is one copy to each unit.For explanation of abbreviations used, see AR 320-50.it U.S. Government Printing Office: 1965— 750-656/9142A