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

Distress Incident: Situation in which life, limb or property is
imperiled.
Distress Phase: An emergency phase assigned when immediate assistance is
required by a craft or person because of threat of grave or imminent
danger, or because of continued lack of information concerning progress
or position after procedures for the Alert phase have been executed.
Ditching: Forced landing of an aircraft on water.
Douglas Sea State: A wave height scale, similar to WMO code 75 and
Beaufort Scale, used in determining radar detection capabilities under
certain sea conditions.
Drift: The movement of a search object caused by external forces.
Drift Compensation: A correction used to account for target motion
during a search.
Drift Error (De): See Total Drift Error.
Effort (Z): A measure of area SRUs will actually search within the
limits of search speed, endurance, and sweep width.
Elemental Solution: Single satellite pass solution upon which a
composite solution is based.
Emergency Locator Transmitter (ELT): Aeronautical distress beacon for
alerting and transmitting homing signals. May be referred to as
Emergency Location Beacon (ELBA), or Crash Position Indicator (CPI).
Emergency Phase: Any of the phases into which SAR incidents and
subsequent SAR missions are classified. See Uncertainty phase, Alert
phase, and Distress phase.
Emergency Position-Indicating Radio Beacon (EPIRB): Maritime distress
beacon for alerting. It may also transmit homing signals.
En Route Automated Radar Tracking System (E-ARTS): ARTCC tracking
computer similar to the terminal ARTSIII systems. E-ARTS facilities are
located at San Juan, PR, Anchorage, AK, and Honolulu, HI. Records
primary and secondary radar data from multiple radar sensors or
antennas.
Glos-3