Global Maritime Distress Safety System (GMDSS)

distress alert; distress call

ad hoc working group on global safety data network

ICAO global aviation safety plan

maritime safety and security team

Space System for Tracking Ships and Aircraft in Distress – Search and Rescue Satellite (COSPAS-SARSAT)

differential global-positioning system (DGPS)

differential global-positioning system surveying

Global Disaster Alert and Coordination System (GDACS) (UN)

Global Navigation Satellite System (GLONASS)

Global Navigation Satellite System (GNSS)

Global Positioning System (GPS)

Global Forecast System (GFS) Data

Charter on the rights and obligations of States relating to global navigation satellite system (GNSS) services

global navigation satellite system

Guidelines for the Introduction and Operational Use of Global Navigation Satellite System

embedded global-positioning and inertial-navigation system (EGI) / embedded GPS/INS

enhanced global positioning and inertial navigation system (EGI) / enhanced GPS/INS

global positioning system-guided munitions (GPS-guided)

Global Mobile Artillery Rocket System (GMARS)

distress signal (=SOS)

ship in distress

suffer distress

distress

distress call

distress landing

distress message

distress phase

distress signal

distress traffic

in distress

international distress frequency

distress beacon