Bowl-Dia: 8.25" (21cm) Grey painted brass, filler plug and expansion chamber unsighted. Brass verge ring graduated to 360 degs. Domed verge glass fitted with a brass spigot at centre, for azimuth sight, and two triangular shades. Inside of bowl painted black. The bowl contains an inner bowl containing the card, gimballed and sprung in the outer bowl. The inner bowl has four black lubber lines carried on white plastic strips, and is free-flooding.
Card-Dia.: 7"(17.8cm) White plastic with black markings, graduated to 360 degs. Attached to large black float at centre.
Binnacle-Dia.: 13" (33cm) Grey painted aluminium with aluminium fittings. A cover plate in side gives access to the correcting magnets consisting of four carriage slides on a vertical tube which carries the horizontal magnets. Hood-Grey painted aluminium with round glazed aperture with shutters. An electric lamp fitting is carried in top of hood.