JP 3-50 National Search and Rescue Manual Vol I - US Navy

designed to detect targets on or near the ocean surface by scanning a
sector typically centered in the direction of aircraft heading. FLAR
may also perform weather-avoidance/navigation in support of aircraft
operations.
Forward-Looking Infrared Radar (FLIR): An imaging system, mounted on
board surface vessels or aircraft, designed to detect thermal energy
(heat) emitted by targets and convert into visual display.
Global Maritime Distress and Safety System (GMDSS): A system established
to provide distress and safety communications between ships at sea and
rescue coordination centers using a wide variety of existing and
technologically advanced communications.
Great Circle: Line between two points on a gnomonic projection chart.
Ground Speed (GS): The speed an aircraft is making relative to the
earth's surface.
Ground Track: See Satellite Ground Track.
Heading: The horizontal direction in which a craft is pointed.
Hoax: Beacon alarm determined to result from a beacon activation or any
other distress signal intended for deceptive purposes.
Hypothermia: Abnormal lowering of internal body temperature (heat loss)
from exposure to cold air, wind, or water.
IFF: Outdated recognized term, "Identification, Friend or Foe," for
radar interrogation of aircraft.
Image (mirror image): Of the two positions associated with a single
satellite pass, the one from which a signal is not emanating.
Inadvertent Alarm: Unintentional beacon alarm determined to result from
an improperly conducted beacon test or accidental beacon activation.
Glos-4