Operational Navigation Flight Training Instruction
AAA: Anti-Aircraft Artillery
ALT: Altitude. Top block of Low-Level Jet Flight Log has altitude AGL for leg; bottom block has emer-
gency safe altitude (MSL) for leg.
AP/1B: Flight information publication with information on training routes in North and South America;
published by the Department of Defense.
ATA: Actual time of arrival at a checkpoint.
Bingo: Aircraft is considered to be in an emergency/fuel critical situation.
Blind: No sight (or lost sight) of wingman.
Checkpoint: A landmark used as a time and/or course reference.
CHUM: DMA Aeronautical Chart Updating Manual; contains changes to individual DOD charts; published
by the Department of Defense.
Coast-in: A point on a coastline where the aircraft crosses over to become feet-dry after a flight over
Combat Plotter: A planning tool with course protractor, turn radius templates, and time and distance
scales; distances in nautical miles. See also Navigation plotter.
CUS: Magnetic course line on the low-level jet flight log.
Dead Reckoning: Use of time, distance and heading for purposes of navigation.
DIST: Distance in nautical miles on the low-level jet flight log.