+
-
Type O.2
Liquid compass
Bowl: Brass painted grey. Glazed. Fill hole on side. Contained in outside holder. Has azimuth circle. At aft of bowl is slit of 60 degs arc for turning bowl on central axis; this can be secured by wing nut. White lubber line on outside of bowl at front. Tripod attachment at base to fit into brass holder, secured by screw spindle. This holds compartments for compensating rods. White inside with black lubber spike.
Card: Small mica card, hollow at centre, has black float at centre. White with black markings graduated to 360 degrees and 4 cardinal points. Eight radial damper arms come off outer rim of card.
Needle: Four needles slung beneath card. Length 1.5" (3.8cm)
Pivot: Unsighted
Azimuth Circle: Has sights, securing arm and bubble level attached. Movable prismatic sights with hinged jet reflector panel in front. V and nipple line up. Two circular filters. Complete sight can be moved sideways across 60 degs by screw mechanism.
Base plate has three bolt holes and vernier. On ACO stand. O.A. height 10" (25.5cm)
Bowl: Brass painted grey. Glazed. Fill hole on side. Contained in outside holder. Has azimuth circle. At aft of bowl is slit of 60 degs arc for turning bowl on central axis; this can be secured by wing nut. White lubber line on outside of bowl at front. Tripod attachment at base to fit into brass holder, secured by screw spindle. This holds compartments for compensating rods. White inside with black lubber spike.
Card: Small mica card, hollow at centre, has black float at centre. White with black markings graduated to 360 degrees and 4 cardinal points. Eight radial damper arms come off outer rim of card.
Needle: Four needles slung beneath card. Length 1.5" (3.8cm)
Pivot: Unsighted
Azimuth Circle: Has sights, securing arm and bubble level attached. Movable prismatic sights with hinged jet reflector panel in front. V and nipple line up. Two circular filters. Complete sight can be moved sideways across 60 degs by screw mechanism.
Base plate has three bolt holes and vernier. On ACO stand. O.A. height 10" (25.5cm)
For more information about using images from our Collection, please contact RMG Images.
Object Details
| ID: | ACO0350 |
|---|---|
| Type: | Liquid compass - aircraft |
| Display location: | Not on display |
| Creator: | Air Ministry |
| Date made: | 1927 |
| Credit: | National Maritime Museum, Greenwich, London, Admiralty Compass Observatory |
| Measurements: | Overall: 250 mm; Diameter: 160 mm |
Your Request
If an item is shown as “offsite”, please allow eight days for your order to be processed. For further information, please contact Archive staff:
Email: library@rmg.co.uk
Tel: +44 (0)20 8312 6516 (during Library opening hours)
Click “Continue” below to continue processing your order with the Library team.