Liquid compass

Bowl: Grey painted aluminium, filler plug at side, expansion chamber at base. Card lifter operating knob fitted to side of bowl. Verge ring has 72 holes drilled in it, and is graduated to 360 degrees, anticlockwise. Numbered pegs, 1, 2, and 4 are fitted in the holes to indicate course to be steered? A course-indicating pointer is fitted above verge glass. Inside of bowl is unpainted, four lubber lines are provided on four strips attached to the side of the bowl. Mounted in a grey aluminium gimbal ring carried in a U shaped bracket and support which is attached to a spindle carrying a rack for corrector magnets. The gimbal 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 N, E, S, and W points are coloured red, green, blue and yellow respectively. Attached to an unpainted aluminium float at centre.

Needle: Unsighted

Pivot: Unsighted

O.A. height 12.5" (31.7 cm)