This compact averaging sextant was widely used in the U.S. Army Air Forces in World War II.
This electo-mechanical system computed positions based on a series of dead reckoning inputs.
One of the most common navigation watches produced, with many used by the U.S. military well into the Cold War era.
The first LORAN receiver for aircraft use to enter service.
This scrap of paper was found in the Tingmissartoq’s octant case.