Bearing Circle, US Navy, Mk I Mod 2, 1943, in Wooden Case Beech This manual is focused on

This manual is focused on those gun systems used in B-17

with BU AERO US NAVY embossed in very small letters on the center of its face

The purpose of the calculator was to determine the range

Here is a fine specimen of a Swiss-made 24 hour

Wheel & Flap Position Indicator

Bearing Circle, US Navy, Mk I Mod 2, 1943, in Wooden Case Beech This manual is focused onThis is a WWII era US Navy Ships Bearing Circle, Mk I, Mod 2 in its original wooden case, made in 1943 by The Lionel Corporation. This model has two adjustable vanes (peep and far) with prism for viewing compass bearing and spirit level. The Bearing Circle was placed on top of a magnetic compass or gyro repeater and used to measure bearings of terrestrial objects. The Peep vane and Wire vane are lined up with the object of interest, whose bearing is