Drift Sight, Mk II-B Pelorus, WWII US Navy Aircraft Sally Bomber It is labeled Fl

It is labeled Fl

This is a Gyrosyn Compass Master Indicator Type C

and on the B-29 it was installed on the flight engineers instrument panel

Across the inside of the ring are two horizontal

Of clear plexiglas

Drift Sight, Mk II-B Pelorus, WWII US Navy Aircraft Sally Bomber It is labeled FlHere is an early WWII era US Navy aircraft Pelorus Drift Sight. A Pelorus Drift Sight is designed to function either as a Pelorus, for taking bearings on objects, or for improving dead reckoning aircraft navigation by measuring the angle between the heading and the track of an airplane. It consists of a small 'telescope' viewing vertically towards the ground, angled toward the direction of the aircraft. When viewing the ground through the scope while