Control Unit C-4, of ARN-7 Automatic Radio Compass, B-17, B-24, B-29 Nick Fighter using an A-6 cartridge containing

using an A-6 cartridge containing 50 feet of 16mm film and a 35mm lens

The subject of this 10 page report is New Japanese Navy Fight Jack II

but not the Royal Air Force since it didn't come into existence until 1918)

A photo of such a sight is in the photo gallery

Few have survived in this condition

Control Unit C-4, of ARN-7 Automatic Radio Compass, B-17, B-24, B-29 Nick Fighter using an A-6 cartridge containingHere is a WWII era Control Unit for the ARN 7 Automatic Radio Compass system used for direction finding and homing. The receiver function tunes from 100 1750 kHz across 4 bands, which were selected by rotating the center knob below the frequency band window. The center knob rotates a flexible shaft connected to a rotatable loop antenna. The ARN 7 system (see diagram), were one of several generations of radio navigational systems installed in an