Boards fixed vertically to a boat to prevent leeway

Nickname for waves breaking into foam.

Heavy roll to leeward with a beam wind.

In square-rigged vessels, short lines at the lower end of the futtock shrouds used to bring in the shrouds tighter to give room to brace the yards at a sharper angle when sailing close hauled.

The bearing of a celestial body from an observer's position.

A light line with a weight on the end used for heaving from ship to shore (or ship to ship) when coming alongside. A heavier cable or hawser is attached which can then be hauled over using the heaving line.

The situation of a vessel when listed over by the wind to such an extent that she does not recover.

Consignments of cargo sent abroad in a ship to be sold or bartered by the master to best advantage or when the opportunity arises.

Used for lashing down sails, awnings, etc., a series of round turns where the end is passed over the standing part and under the bight and pulled taut on each turn.

Method of reeving a tackle in order to gain the maximum increase in power.

Down or downwards; as in "Lay alow!"; opposite of Aloft.

A component on a compressed air line designed to increase in magnitude the flow by releasing small amounts of compressed air at high velocity through an internal, ring shaped nozzle. This column of air released through the front creates a vacuum behind, t ...

Line 12 inches or 300 mm long, painted amidships on both sides and parallel to the load lines.

A ladder of rope with rungs, used over the side.

Charge assessed by a pier or dock owner against freight handled over the pier or dock or against a steamship company using the pier or dock.

A curved metal spar for handling a boat or other heavy objects.

The measurement around the body of a ship. The half girth is taken from the center line of the keel to the upper deck beam end.

The removal of heat from a gas after compression is completed.

ACRONYM - A unit of electrical current or rate of flow of electrons through a conductor. One volt across one ohm of resistance causes a current flow of one ampere. One ampere is equal to 6.25 x 1018 electrons per second passing a set point in a circuit. A ...

Are any material with an affinity for moisture. These analyzers use sensing elements that contain moisture adsorbing material. A change in the moisture content of the element is detected by an electric network and is used as a measurement of dew point