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Type O.1
Observer's compass-Experimental Model
Bowl: Brass painted black. Fill hole on side. Glazed. Expansion chamber on underside of bowl. Bowl fitted to spring plate and has four steadying arms on side. Vernier on base plate. White inside with 90 degree arc attached to side of bowl.
Card: Thin white strip marked to 8 points. Has black dome at centre. Has four arms marked 0, 1, 2, 3.
Needle: Four needles slung beneath card.
Pivot: Unsighted
Bowl: Brass painted black. Fill hole on side. Glazed. Expansion chamber on underside of bowl. Bowl fitted to spring plate and has four steadying arms on side. Vernier on base plate. White inside with 90 degree arc attached to side of bowl.
Card: Thin white strip marked to 8 points. Has black dome at centre. Has four arms marked 0, 1, 2, 3.
Needle: Four needles slung beneath card.
Pivot: Unsighted
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Object Details
| ID: | ACO0341 |
|---|---|
| Type: | Liquid compass - aircraft |
| Display location: | Not on display |
| Creator: | Admiralty Compass Observatory |
| Date made: | 1923 |
| Credit: | National Maritime Museum, Greenwich, London, Admiralty Compass Observatory |
| Measurements: | Overall: 102 mm; Diameter: 160 mm |
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