Compass, Magnetic Direct Reading, US Navy Mark IX Carvair with two clamping screws

with two clamping screws

12 April 1957

The US Navy's TBM Avenger Torpedo Bomber also used this venturi

but the directional lens is absent in this specimen

Compass, Magnetic Direct Reading, US Navy Mark IX Carvair with two clamping screwsHere is an example of the WWII era US Navy Aircraft Direct Reading Magnetic Compass Mark IX, as used in the seaplanes PBY Catalina and PBM Mariner Patrol Bombers. The compass was illuminated electrically via bulb mounted in a small compartment over the compass itself. Inside the same compartment is access to the direction compensating screws, used to calibrate the compass. This example is in reasonable condition for its age. The fluid is absent.