Sextant, Aircraft Periscopic, MS28011-5, with Case, for Display, Parts, or Repair Bf-109 25 inches diameter and ~7

25 inches diameter and ~7 inches deep

Here is a student workbook that helped cadets understand the functions of aircraft

The Gunners Quadrant TM 9-1527 Technical Manual dated 1943 can be downloaded at no cost by clicking here

this version has the functions of Elapsed Time

published by the US Army entitled Fundamentals of Aircraft Instruments in November 1968

Sextant, Aircraft Periscopic, MS28011-5, with Case, for Display, Parts, or Repair Bf-109 25 inches diameter and ~7This 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, C 130 Hercules, and of the US Navy such as the P2V Neptune and others. This example has a serial # prefix of AF 53, manufactured under a USAF purchase order issued in 1953. The periscopic sextant was used by navigators to fix and track the position of the