(мор.) радіосигнал лиха
distress alert; distress call
distress call
call up (call-up)
distress signal (=SOS)
Global Maritime Distress Safety System (GMDSS)
ship in distress
suffer distress
distress
distress landing
distress message
distress phase
distress signal
distress traffic
in distress
international distress frequency
distress beacon
distress signals
Space System for Tracking Ships and Aircraft in Distress – Search and Rescue Satellite (COSPAS-SARSAT)
radio call
Sched (scheduled radio call)
scheduled radio call (Sched)
radio call sign
single-channel ground and airborne radio system (SINCGARS) radio
radio pouch, PRR pouch / personal role radio pouch
radio rucksack, radio carrier rucksack
radio-radar; radio/radar
cadence (call)
call for fire (CFF)
call sign (callsign)
call-out procedure
call-out suit (CBRN)
call-up; conscription, draft