Altimeter, Sensitive, Type C-12, 50,000 ft, US Navy WWII, Encased Sunderland the C-1 Directional Gyro was

the C-1 Directional Gyro was used in versions of the Curtis P-40N Warhawk and Bell P-39N Airacobra Fighters and the A-30 Martin Baltimore light bomber

Marine Corps Air Defense Group - 43

as use in early versions of large British RAF aircraft such as the Avro Lancaster

The earth's surface reflects some of this radiated carrier

Altimeter, Sensitive, Type C-12, 50,000 ft, US Navy WWII, Encased Sunderland the C-1 Directional Gyro wasHere is a WWII era Sensitive Altimeter, US Navy Type C 12, made by Kollsman, encased in a wood housing with rubber feet. The C 12 Altimeter was used across all aircraft of the Air Corps US Army and US Navy including heavy bombers B 17 and B 24, medium bombers, B 25 and B 26, Fighters P 38, P 39, P 40, P 47, and P 51, and transports C 46 and C 47, according to the Maintenance Interchangeability Chart dated Dec 1943. The C 12 Sensitive Altimeter