Interagency Single Engine Air Tanker Operations Guide - National ...

INTERAGENCY SINGLE ENGINE AIR TANKER OPERATIONS GUIDE
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Branch: The organizational level directing two or more divisions;
organizationally between the Operations Section Chief and the Division/Group
Supervisors.
Break left/right: Turn left/right. Applies to aircraft in flight, usually on the
drop run and when given as a command to the pilot; implies immediate
compliance, e.g., “Tanker 75, break right; a small plane is crossing the target.”
Burning conditions: The state of the combined factors of environment that
affect fire in a given fuel association.
Burning index: A number related to the contribution that fire behavior makes
to the amount of effort needed to contain a fire in a particular fuel type within a
rating area. This is an index for describing fire danger.
Burning out: Setting fire inside a control line to consume fuel between the
edge of the fire and the control line (see backfire).
Burning period: That part of each 24-hour period when fires will spread most
rapidly, normally between 10 a.m. and 6 p.m.
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Canopy: The stratum containing the crowns of the tallest vegetation present
(living and dead), usually above 20 feet.
CAR Part 3: Predecessor of FAR Part 23; refers to normal certificated load
limits, etc.
CAR Part 8: Predecessor of portions of FAR parts 23 and 91.39; refers to
restricted category of civil aircraft operating limits, e.g., may not fly over
congested areas, may carry only essential personnel, etc.
Cardinal points: The four chief points of the compass -- north, south, east and
west.
Clock method: A means of establishing a target or point by reference to clock
directions where the nose of the aircraft is 12 o’clock, moving clockwise to the
tail at 6 o’clock, e.g., “The target is at your 9 o’clock position.”
Concentration: The amount of the substance contained per unit volume of a
liquid.
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