EXPLANATION OF TERMS -
a.
The following terms and definitions include all those published in the Federal Aviation Administration Pilot/Controller Glossary, plus some selected ICAO and Military Terms.

b.
 The source from which the definition is taken is shown in parenthesis beside the term in a code form as follows:

(1)
NO CODE - There is only one definition for this term in this chapter and it is taken from the Pilot/Controller Glossary (P/CG).

(2)
(P/CG) - The definition published beside the term is taken from the Pilot/Controller Glossary located in the FAA Aeronautical Information Manual.

(3)
(JCS) - The definition is taken from Joint PUB 1-02 (The DoD Dictionary of Military and Associated Terms) and is different than that in the P/CG.

(4)
(NATO) - The definition is taken from NATO AAP6 (NATO Glossary of Terms) and is different than that in the P/CG.

(5)
(ICAO) - The definition is taken from the ICAO Document 9569, Definitions and is different than that in the P/CG.

(6)
(USA, USN, USAF, NGA or etc.) - The definition has been provided to NGA ST.LOUIS by the agency indicated within the parenthesis. This definition does not appear in the P/CG, JCS, NATO or ICAO documents.

(7)
(IFIM) - The definition is taken from the Federal Aviation Administration International Flight Information Manual.

(8)
(GPH 204) - The definition is taken from DND Flight Information Publication - GPH 204.

(9)
TWO OR MORE CODES - The term is defined the same way in each of the documents indicated.

ABBREVIATED IFR FLIGHT PLANS - An authorization by Air Traffic Control requiring pilots to submit only that information needed for the purpose of Air Traffic Control. It includes only a small portion of the usual IFR flight plan information. In certain instances, this may be only aircraft identification, location, and pilot request. Other information may be requested if needed by Air Traffic Control for separation/control purposes. It is frequently used by aircraft which are airborne, desire an instrument approach, or by aircraft on the ground which desire a climb to VFR on top. (See VFR-on-top).
ABEAM - An aircraft is "abeam" a fix, point or object when that fix, point or object is approximately 90 degrees to the right or left of the aircraft track. Abeam indicates a general position rather than a precise point.
ABORT (P/CG) - To terminate a preplanned aircraft maneuver; e.g., an aborted take-off.
ABORT (JCS, NATO) -
(1) Failure to accomplish a mission for any reason other than enemy action. It may occur at any point from initiation of operation to destination.
(2) Discontinue aircraft take-off run or launch.
ACCELERATE-STOP DISTANCE AVAILABLE [ICAO] - The length of the take-off run available plus the length of the stopway if provided.
ACKNOWLEDGE - Let me know that you have received my message.