сигнал лиха
distress call
radio distress call
call alert receiver
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)
air alert
airborne alert
alert
alert condition (LERTCON)
alert crew
alert level
alert mission
alert posture
bug alert
carrier alert
combat alert duty
combat alert forces
crash air alert