WWII AIR MINISTRY R.A.F. MK.II ASTRO COMPASS

** NEW ** WWII Air Ministry R.A.F. marked Astro Compass Mark II stamp dated 19 Nov 1942.
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Description

The astro compass was an Air Ministry piece of equipment used by the R.A.F. from 1941 to navigate aircraft by the position of sun, moon or stars. It provided a rapid check on true course and enabled a steer independent from the magnetic compass.