The direction to which a compass points. Magnetic north differs from true north because the magnetic fields of the planet are not exactly in line with the north and south poles. Observed differences between magnetic and true north is known as magnetic var ...

A weight attached to a line used to determine depth by lowering it into the water.

The operation of taking a sounding with the hand lead (to find bottom).

Recapitulation of the terms and conditions agreed

Goods floating on surface of sea after a wreck.

Condition of a sailing ship when all sails have been taken down in a severe storm, very often a hazardous undertaking if there is a high sea running.

Small staysail located between the foremast and mainmast.

Six feet. Comes from the Dutch word "fadom" which was the distance between fingertips of outstretched hands.A unit of measurement relating to the depth of water or to the length of line or cable; one fathom is 6 feet or 1.83 meters

A barge equipped with tracks on which up to about 12 railroad cars are moved in harbors or inland waterways.

(1) In good condition. (2) To adjust to proper shape or size.

A lighted or unlighted fixed (non-floating) aid to navigation that serves as a signal or indication for guidance or warning. (Lights and daybeacons both constitute "beacons.")

A law of chemistry and physics: the rate of diffusion of one substance in another is proportional to the negative gradient of the concentration of the first substance.

Is the ratio of the computed isentropic temperature rise to the measured total temperature rise during compression.

The bearing of an object after magnetic variation has been considered, but without compensation for magnetic deviation.

In sailing, to be lifted by a wind shift that allows your boat to be lifted closer to the wind where by it allows you to sail a shorter distance to the next mark, buoy or finish line

To haul in or bind something together in order to create more space.

A small crane that projects over the side of the boat to raise or lower objects (such as smaller boats) from or to the water.

A depth measuring device.

Broadly, insurance covering loss or damage of goods at sea. Marine insurance typically compensates the owner of merchandise for losses sustained from fire, shipwreck, etc., but excludes losses that can be recovered from the carrier.

Is a gas that follows the perfect gas laws without deviation. There is no such thing, however it is the basis from which calculations are made and corrections applied.