franchise-star-trek-tng-technical-manual1

2.2 USSfi^Wf COORDINATE SYSTEM2.2 USS HmmtCOORDINATE SYSTEMEXTERNAL COORDINATE SYSTEMAn integrated system governing control of all manufacturing,repair, and operational structural reference pointsexists for the USS Enterprise and all other Starfleet vessels.The system utilizes a standard three-dimensional vertex andvector measuring scheme, with centimeters as its operativevalue. The three axes are labeled X, Y, and Z. The X axis runsport-starboard, with +X to starboard. The Y axis runs dorsalventral,with +Y to dorsal. The Z axis runs fore-to-aft, with +Zto aft. Note that this is opposite in sign to translational maneuvers,which consider +Z to be in the direction of flight.All single points, vectors, and planes can be determinedwith this scheme, creating a common ground for structuraltopics. The Enterprise is considered to have three vesselconfigurations: Docked, Saucer Module, and Battle Section.Each configuration maintains a specific measurement origin,designated by the XYZ value of the forwardmost structure. Forexample, the center forward edge of the Saucer Module islabeled XYZ S 0,0,0. Coincidental^, it is also the origin for thedocked vessel and can be labeled XYZ D 0,0,0. The origin forthe Battle Section, designated XYZ B 0,0,0, also correspondsto a point on the docked vessel as XYZ D 0, -1676, 25146,meaning that the Battle Section origin is at 25146 cm aft of theship's forward edge and 1676 cm below.Specific components, such as the warp engine nacelles,are given their own origins and coordinate values, and thesewill also have corresponding values relative to their parentassemblies. For example, the origin of the port warp nacelleis labeled XYZ NP 0, 0, 0. This point, relative to the BattleSection origin, is XYZ B -12954, -1524, 13716.Planes passing through the different vessel configurationsare labeled according to their axes. XY planes of thedocked starship run vertically and laterally, XZ planes intersectthe ship parallel with the saucer equator, and YZ planesrun vertically and fore-to-aft. Planes may be called out asexisting at specific XYZ station points, and coordinates maybe given within that plane, especially in locating key starshipcomponents or processes.Normally, all coordinate and planar data are manipulatedby the main computers in their monitoring and repairtasks and are available to Engineering crew members as anoption in considering exact three-dimensional relationshipswithin the ship.INTERNAL COORDINATE SYSTEMStructures and objects within the USS Enterprisespaceframe are located with the following coordinate system.Intraship locator addresses are based on a fifteen-digit codewhich follows the form: "12-1234-000/000/000."XYZ D -27987,0,19418— XYZNPOAXYZBXYZ D+XTranslational maneuvers2.2.1 External coordinate reference station points