visual call sign

tactical sign (tac-sign)

call sign (callsign)

collective call sign

net call sign

tactical call sign

circular call sign

address call sign

call sign

voice call sign

call sign (signal)

radio call sign

call up (call-up)

beyond visual range / beyond-visual-range (BVR)

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

cadence (call)

call for fire (CFF)

call-out procedure