A through hull valve, a shut off on a plumbing or drain pipe between the vessel and the sea

Lifts temporary quarantine of a vessel; granted pratique by Health Officer.

Load/unload control system that tries to maximizes compressor efficiency by matching air delivery and air demand. Compressor is operated at full load or idle

An arbitrary filter efficiency rating.

A small low rail around the deck of a boat. The toe rail may have holes in it to attach lines or blocks and to allow drainage. A larger wall is known as a gunwale.

A structure which extends outboard beyond the edge of the hull for some special purpose. Some Polynesian canoes use outriggers to support an "ama" or small secondary hull, while fishing boats may use outriggers to suspend lines or nets over the water. ...

A positive displacement air compressor which has no oil injected into the compression chamber for lubrication, cooling or sealing

The straight or curved line of the deck line; curvature of the lines of a vessel toward the bow and stern.

The angle between the sail and the apparent wind or the rudder or centerline and the water flow.

Sink by filling with water.

The strokes on the ship's bell to mark the passage of time. The passage of time in each watch is marked by the bell every half-hour.

Is the ratio in absolute units of the actual gas temperature to the critical temperature.

The power which is theoretically required to compress a gas under constant temperature, in a compressor free from losses, from a given inlet pressure to a given discharge pressure.

A gap unintentionally left uncovered while painting or varnishing.

The short deckhouse or main hatchway which is raised above the level of the cabin top or coachroof.

Where the boat is pointed directly into the wind, sails luffing

(1) A second method of propelling a vessel. On a sailboat this would be the engine. (2) Machinery fitted in steam and motor vessels which is not part of the main propelling machinery. (3) a support group, e.g., Coast Guard Auxiliary

A right claim against the guarantors of a loan or draft or bill of exchange.

Towards the sides of the vessel (with reference to the centerline).

The amount of air that a filter can handle. Expressed in CFM.