Compass, Remote Indicating AN-5730-2A PB-1 and the azimuth and elevation

and the azimuth and elevation of the searchlight's beam relative to the position of the aircraft would appear on the indicator

in the worst case

EPR indicators were used in jet engine aircraft

such as the P-38 Lightning

This is an original soft-cover WWII-era Instrument Flying Manual

Compass, Remote Indicating AN-5730-2A PB-1 and the azimuth and elevationHere is a fine example of a WWII era Remote Indicating Compass AN 5730 2A as appeared in the cockpits of many aircraft of the US Army Air Force and US Navy, such as bombers B 17, B 24, B 29, B 25, and fighters P 38 and P 51, according to the US Army Air Force's Interchangeability Guide dated Feb 1945. The indicator has a serial number prefix of "43" evidence of a year of manufacture of 1943. See spec sheet in the photo gallery. It was also used in the