Compass Bowl, for Direct Reading Compass, WWI F-101 Voodoo It was a late war

It was a late war innovation that used the aircraft altitude and speed with the direct correlation of where the weapon was pointed to calculate the reticle

or to determine correction factors for fixed compasses

LP-21-A Rotatable Loop Antenna

and Automatic/Manual switch requires the proper electrical connection to toggle

Compass Bowl, for Direct Reading Compass, WWI F-101 Voodoo It was a late warHere is a Compass Bowl from a WWI era aeronautical compass. The brass bowl would have been mounted by the 3 rubber covered metal pegs to a frame, with the frame attached to the instrument panel or to a pedestal. The compass card, which is missing, would rest on the center spring mounted pole, allowing it to float in the compass fluid and to rotate as necessary to point north. There would have been a directional ring affixed to the top flange which