Sextant, Aircraft Periscopic, MS28011-5 Vickers This is its first printing

This is its first printing

Time is set by pulling out and turning the red knob (lower left)

The screws on the panel show a bit of surface rust

Typically mounted under the wing or fuselage of the aircraft

It has a serial number prefix of AC-39

Sextant, Aircraft Periscopic, MS28011-5 Vickers This is its first printingThis is a Cold War era Periscopic Aircraft Sextant and Case, as used by navigators in aircraft of the US Air Force such as B 36 Peacemaker, B 47 Stratojet, B 50 Superfortress, B 52 Stratofortress, and of the US Navy such as the P2V Neptune and others. The periscopic sextant was used by navigators to fix and track the position of the aircraft in flight, usually by nighttime celestial (star) readings, but also by the position of the sun in daylight. The