попереджувальний знак; знак попередження / огорожі (напр. зараженої ділянки)
tactical sign (tac-sign)
gas warning sign
call sign (callsign)
collective call sign
conventional sign
marking sign
net call sign
tactical call sign
circular call sign
hazard sign
mine sign
BIO sign
crossing sign
deviation sign
aerodrome identification sign
sign
address call sign
challenging sign
call sign
trail sign
visual call sign
voice call sign
call sign (signal)
code sign
collective сall sign
recall sign
radio call sign
advance warning
advance-warning satellite
air defense early warning
airborne early warning (AEW)
airborne early warning aircraft