радіопозивний
tactical sign (tac-sign)
call sign (callsign)
collective call sign
net call sign
tactical call sign
circular call sign
address call sign
call sign
visual call sign
voice call sign
call sign (signal)
call up (call-up)
radio call
radio distress call
Sched (scheduled radio call)
scheduled radio call (Sched)
conventional sign
marking sign
hazard sign
mine sign
BIO sign
crossing sign
deviation sign
aerodrome identification sign
sign
challenging sign
gas warning sign
trail sign
warning sign
code sign
collective сall sign
recall sign