Liquid compass

Bowl: Black painted metal, filler plug at side, expansion chamber at base. Inside of bowl unpainted, four lubber lines are provided on four strips attached to side of bowl. A glass bottom is fitted to the bowl and an electric lamp is provided, screwing into an aperture in the false bottom of the bowl. A course-indicating pointer is fitted above the card and is operated by a spring plunger working through a gland in the verge glass. Mounted in black metal gimbal ring carried in a U shaped bracket and support, which is attached to a spindle carrying two racks for corrector magnets. The gimbal bracket can be rotated a small amount in azimuth for adjusting the lubber to the fore-and-aft line.

Card: Enamelled, white, graduated to 360 degrees and the North triangular painted red, East and West yellow, and South white.

Needle: Unsighted

Pivot: Unsighted

O.A. Height 14.5" (36.8 cm)