B Identification Switchbox - Aircraft
identification switch used for "visual
identification" in the circuit prior to landing or when
approaching convoy at sea. The switch was connected to the
white signal lights, one above and one below the aircraft.
The telegraph key was intentionally made quite rough to
ensure reliable operation in the vibrating aircraft.
on several types of aircraft both of British and American
manufacture like Spitfire, Anson, Bolinbroke, Lancaster,
Oxford, on Sunderland and Catalina flying boats, etc.