Course indicator

Course indicator. Square perspex with rotating central disc graduated to 360 degrees. Central disc can be set against scale 20 degrees either side of North to allow for compass error and variation. Small parallel ruler attached to one side of square.

Object Details

ID: NAV0094
Type: Course indicator
Display location: Not on display
Creator: Unknown
Date made: 1950
Credit: National Maritime Museum, Greenwich, London
Measurements: 140 mm x 127 mm