Liquid compass - aircraft

Liquid compass
Bowl: Aluminium painted black. glazed. White inside with black lubber spike. Fill hole on side. Two screws on either side for carrying strap. Has wooden handle at base.
Card: Air Ministry card, white with black markings graduated 0 to 360 dgrees and four cardinal points. Open at centre with eight spokes. Pivot spike at centre. Diameter 2".
Needle: Four 1" needles slung beneath card.
Pivot: Consists of cup on stand on which card pivot spike rests.
Sights: Adjustable prism with level.
O.A. Height 9" (22.8cm)

Object Details

ID: ACO0385
Type: Liquid compass - aircraft
Display location: Not on display
Creator: Air Ministry
Date made: Unknown
Credit: National Maritime Museum, Greenwich, London, Admiralty Compass Observatory
Measurements: Overall: 200 mm; Diameter: 100 mm