Compass, Magnetic Direct Reading, US Navy Mark IX Carvair likely when they were removed

likely when they were removed from the aircraft

12 April 1957

with two clamping screws

but the directional lens is absent in this specimen

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

Compass, Magnetic Direct Reading, US Navy Mark IX Carvair likely when they were removedHere 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.