Radar Indicator, CS-55ACE, ASD Surface-Search, WWII US Navy Eurofighter Typhoon The gunner has set the

The gunner has set the target length and range on the sight using the knobs shown

The crystal glass was secured by a bezel and gaskets to seal the movement against dust

the gyro produced vertical attitude signals which were amplified and transmitted to the autopilot system and indicators on the flight deck of the aircraft

each holding 0-60 gals

See photo of the location of the instrument on the Flight Engineers upper instrument panel from the C-121 flight manual dated 1958

Radar Indicator, CS-55ACE, ASD Surface-Search, WWII US Navy Eurofighter Typhoon The gunner has set theThe indicator is a CS 55ACE indicator for a WW2 US Navy Type ASD surface search radar system. The ASD was the first effective American microwave search radar, and was used in aircraft such as the US Navy's Patrol Bomber Lockheed PV 1 Ventura, PV 2 Harpoon, and Grumman TBF Avenger. Researching the internet reveals that Type ASD X band airborne search radar used this indicator as a B scope (range vs bearing) in US Navy patrol aircraft to detect ships