F9F-8 Panther Fighter Cruise Control / Rest / Climb-Descent Combination Computer 1956 F-94 It appears that the lens

It appears that the lens can be removed and the upper and lower operating limit indicators can be set by sliding the triangular pointers along the scale (we have not attempted this in order to preserve the artifact)

which allowed the RDF stations to determine a fix (but also prevented the pilot transmitting during a period indicated by the arc on the dial)

The bulb illuminated the reticle which was projected through the lens onto the glass reflector from below

while listening for triggering through his earphones

It includes a Rest Computer (Rest meaning not flying under combat conditions) on one side and a Climb-Decent Tabulator on the opposite side

F9F-8 Panther Fighter Cruise Control / Rest / Climb-Descent Combination Computer 1956 F-94 It appears that the lensThis is a Korean War era Flight Computer designed specifically for the US Navy's jet fighter, the Grumman F9F 6 Panther, equipped with twin J 48 P 8 engines. It includes a Rest Computer (Rest meaning not flying under combat conditions) on one side and a Climb Decent Tabulator on the opposite side. these are essentially 2 disc, 7 inch circular slide rules.