Military Issue USAF Aircraft Periscope Sextant
This periscopic aircraft sextant was the means of navigation in the dark days before electronic GPS systems. These sextants were used from the 1950s into the early 2000s. The periscopic sextant was not integral to the aircraft, so maintained separately, but taken onto every flight. The power supply for the sextant was taken from the aircraft DC power source. The sextant uses a bubble level finder, and a crosshair sight to line up with the horizon and the stars, telling you in which direction you are going. This is the periscopic sextant that was used by the USAF and CAF during the last 45 years. It was used on the B-47, B-52, C-54, C-97, C-118, C-119, C-121, C-124, KC-135, and other aircraft. This particular sextant dates back to the 1950s.