сигнал лиха
distress call
radio distress call
call up (call-up)
call alert receiver
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)
cadence (call)
call for fire (CFF)
call sign (callsign)
call-out procedure
call-out suit (CBRN)
call-up; conscription, draft
collective call sign
draft (conscription, call-up)
mayday call (‘Mayday, Mayday, Mayday’)
net call sign
on-call fire
on-call fires tab
on-call mission