Compass, Magnetic Direct Reading, US Navy Mark IX with Plaque Northrop The fluid is low by

The fluid is low by about a teaspoon

The content of this publication is a reprint from an article in a London journal

part number 3800

This indicator has a label of Cherry Point

Compass, Magnetic Direct Reading, US Navy Mark IX with Plaque Northrop The fluid is low byHere 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 very good condition for its age. The fluid is intact but not