чергування на радіо в режимі приймання (прийому)
silence-silence-silence
blank silence
electronic silence
radio silence
silence a gun
silence lifted
silence procedure
wireless silence
silence fini
silence
radar silence
observe radio silence
listening post
listening surveiilance
check for listening devices
underwater listening post
gaining information by use of listening posts
listening device
surreptitious listening
surreptitious listening device
wall listening device
wall listening microphone
radio listening service
passive listening
passive listening device
air listening post