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Liquid compass
Bowl-Grey painted alloy, filler plug at side, expansion chamber incorporated with glass bottom of bowl. Base of bowl carries a heavy balancing ring. Inside of bowl silvered with two black lubber lines carried on bright metal strips secured to side 180 degs apart. Mounted in a grey painted brass gimbal ring 12" (30.5cm) dia.
Card-Dia. 7.5" (19cm) Unpainted aluminium, graduated to 360 degs by perforations around edge of card. Attached to an aluminium float at centre.
Needle- Four needles 2 x 2.5" (6.4cm), 2 x 3" (7.6cm) mounted below float.
Pivot-Pivot stem can be seen attached to aluminium bridge mounted across bottom of bowl, the rest unsighted.
Card-Dia. 7.5" (19cm) Unpainted aluminium, graduated to 360 degs by perforations around edge of card. Attached to an aluminium float at centre.
Needle- Four needles 2 x 2.5" (6.4cm), 2 x 3" (7.6cm) mounted below float.
Pivot-Pivot stem can be seen attached to aluminium bridge mounted across bottom of bowl, the rest unsighted.
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Object Details
| ID: | ACO1182 |
|---|---|
| Type: | Liquid compass |
| Display location: | Not on display |
| Creator: | Geophysical Instrument Co |
| Date made: | 1938 |
| Credit: | National Maritime Museum, Greenwich, London, Admiralty Compass Observatory |
| Measurements: | Overall: 125 mm; Diameter: 295 mm |
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