What is "callsigns"

Usage examples of "callsigns".

The sidebar on Ranson's multi-function display listed callsigns, isolated in the cross-talk overheard by the superb electronics of the tank pretending to be in Kawana while it waited behind Chin Peng Rise north of the tiny hamlet.

The sidebar on Ranson’s multi-function display listed callsigns, isolated in the cross-talk overheard by the superb electronics of the tank pretending to be in Kawana while it waited behind Chin Peng Rise north of the tiny hamlet.