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 indicator is a CS-55ACE indicator for a WW2 US Navy Type ASD surface-search radar system

This periscope appears to be new old stock

The knob rotates the barometric pressure adjustment

but it is there and shows the spec # and serial #)

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