When a boat has two separate fins, instead of a centerboard or keel, they are referred to as bilge boards.

The part of a ship's rigging which is permanently secured and immovable; e.g. stays, shrouds, etc.

A slide which travels on a track to which the mainsheet may be attached. The sail shape can be subtly altered by changing the mainsheet position on the traveler.

(1) To tip the boat over so that the boat is upside down with the mast pointing down to the sea bottom. (2) A bag in which a spinnaker or other large sail can be stowed with the lines attached so that it can be rapidly raised.

(1) Small boat for one or two rowers. (2) Small fishing vessel with foresail, boom mainsail, and mizzen trysail.

On wooden boats, a line of planking running from the bow to the stern along the hull.

A slang name for a bullying officer on a ship.

Sailor's name for a block of sandstone used for scrubbing the wooden decks of a ship; seamen had to get down on their knees to use them. Large holystones were known as "Bibles", while smaller blocks to reach awkward places were known as "Prayer Books" ...

Part of a ship/s side projecting upwards along the line of the weather deck or uppermost deck.

Used to describe a light that blinks on and off, where the period of light is shorter than the period of darkness separating the flashes.

Metal fitting attached to the hull that supports and aligns the aft portion of the propeller shaft.

The difference in depth between high and low tide.

A warehouse authorized by Customs to receive duty-free merchandise.

Charge made for local hauling by dray or truck. Same as Cartage.

A method of moving a boat with oars. The person rowing the boat faces backwards, bringing the blade of the oars out of the water and toward the bow of the boat. They then pull the oars through the water toward the stern of the boat, moving the boat forwar ...

Various statements that the U.S. government requires to be displayed on export shipments. The statements specify the authorized destinations.

To lower, sink deeper.

Is a process taking place under constant volume. To raise the pressure from state 1 to state 2, heat must be added. The pressure change is proportional to the change in temperature.

A filter element so full of contaminants that no longer can pass rated flow without excessive pressure differential.

Hit by a wave over the stern; having a wave wash over the stern of the boat. This can be a very dangerous situation.