Compass, Magnetic Direct Reading, Type B-16 US Army Air Force WWII PV-2 Harpoon to show the direction in

to show the direction in which the airplane is pointing

and clockwise in the instance of positive G's

just try to hear that over the cacophony of multiple radial engines

WIth the part number prefixes of CV

An example of aircraft in which this appeared is the Nieuport 28 fighter

Compass, Magnetic Direct Reading, Type B-16 US Army Air Force WWII PV-2 Harpoon to show the direction inThe Army Type B 16 Direct Reading Magnetic Compass was used across a number of US Army Air Corps and Air Force aicraft during WWII, including heavy bombers B 17, B 24, B 29, medium bombers B 25 and B 26, as well as light bomber A 20, according to the Accessories Interchangeability Chart dated Feb 1945. It was also used in versions of US Army Air Force WWII fighters P 38, P 39, P 40, and P 47, as well as transports C 46 and C 47. This model was made by