Magnet corrector - aircraft compass

Magnet display card with 32 bar magnets mounted on it.

Object Details

ID: ACO0397
Type: Magnet corrector - aircraft compass
Display location: Not on display
Creator: Admiralty Compass Observatory
Date made: Unknown
Credit: National Maritime Museum, Greenwich, London, Admiralty Compass Observatory
Measurements: Overall: 5 mm x 457 mm x 152 mm