міжнародна частота передачі сигналу біди
distress alert; distress call
pulse repetition frequency (PRF) / pulse-repetition frequency
international humanitarian law (See international law of armed conflict)
International legion for the Defence of Ukraine (ILDU) / International Legion of Territorial Defence of Ukraine / Ukrainian Foreign Legion
distress signal (=SOS)
Global Maritime Distress Safety System (GMDSS)
ship in distress
suffer distress
distress
distress call
distress landing
distress message
distress phase
distress signal
distress traffic
in distress
distress beacon
distress signals
Space System for Tracking Ships and Aircraft in Distress – Search and Rescue Satellite (COSPAS-SARSAT)
radio distress call
common frequency
doppler frequency shift
fixed frequency channel
frequency
frequency and directional chart
frequency band
frequency intelligence
frequency modulated (FM)
frequency modulation (FM)
frequency range (band)
frequency response
frequency, intensity, time, type (FITT)