Dry card compass and binnacle

Bowl-Dia.11" (28cm) Bronze painted brass, domed glass at base partly filled with oil to give stability. Verge ring graduated 0o -180o via both E & W points. Inside of bowl painted white with four black lubber lines painted on side. Verge glass has a brass stud at centre on which an azimuth mirror can fit.
Card- Dia. 10" (25.4cm) "Kelvin Light Dry" type, graduated to 1/4 points and quadrantally in degrees.
Binnacle-Dia. 15.5" (39.4cm) "Kelvin Type", wood with brass fittings. Fitted with "Flinders Bar" 24.75" (62.9cm) long, sphere brackets with spheres, clinometer and two wooden doors give access to fore and aft and athwartship corrector magnet racks and to the bucket containing the vertical corrector magnets, an electric lamp with shutter is also fitted. Fitted with pattern 929 "B" coils of American manufacture, an H.E. coil, pattern 925B. Hood has two oval glazed apertures with covers (one with shutters) and a round aperture at top with cover, and two oil lamp brackets.

Object Details

ID: ACO1125
Type: Dry card compass and binnacle
Display location: Not on display
Creator: Kelvin Bottomley & Baird Ltd
Date made: circa 1938
People: Thomson, William
Credit: National Maritime Museum, Greenwich, London, Admiralty Compass Observatory
Measurements: Overall: 1422 mm x 820 mm x 560 mm x 96 kg
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