liquid compass

Instrument with magnets that floats on a liquid; it indicates magnetic north.

pivot

Axle around which the compass card rotates.

sliding cover

Retractable cover that protects the glass dome from scratches when not in use.

bowl

Watertight case containing the magnetic elements, which float in a liquid (oil or alcohol) to reduce oscillations.

compass card

Rotating disk graduated from 0° to 360° and integrated with two magnets; it shows the cardinal points and the points in between.

glass dome

Transparent nondistorting hemispherical cover for the bowl containing the liquid.