Aircraft plotting instrument

This instrument is made of perspex throughout and consists of a circle dia. 6" (15.2cm) with a pivot at the centre to which either of three arms can be attached.
1-Graduated 5-50 16.5" (41.9cm) long
2-Graduated 5-50 14" (35.6cm) long
3-Ungraduated 16.5" (41.9cm) long

Object Details

ID: ACO1241
Type: Aircraft plotting instrument
Display location: Not on display
Creator: Unknown
Date made: circa 1940
Credit: National Maritime Museum, Greenwich, London, Admiralty Compass Observatory
Parts: Aircraft plotting instrument