Limber hole of a ship.

A sailboat with its bow pointed directly into the wind, preventing the sails from filling properly and stopping the boat. It can be very difficult to get a boat that is in irons back under sail. also known as "In Stays".

The dimensions of all parts which go into the construction of a ship's hull.

A measurement of vacuum or pressure that is used to measure the airflow restriction.

Additive that promotes the formation of a stable mixture, or emulsion, of oil and water. Common emulsifiers are: metallic soaps, certain animal and vegetable oils, and various polar compounds.

Screw compressor development center. Licensor to 90% of twin screw compressor market.

To stop, especially to stop work.

To pass a turn around a belaying pin or cleat.

The officer on board responsible for the navigation of the ship.

(1) The alternate rise and fall of the bow of a vessel proceeding through waves; also called hobby horsing (2) The theoretical distance advanced by a propeller in one revolution. (3) Tar and resin used for caulking between the planks of a wooden vessel.

A system by which an object such as a compass is suspended so that it remains horizontal as the boat heels.

A document required and issued by some national governments authorizing the importation of goods.

Light lines from the topping lift to the boom, forming a cradle into which the mainsail may be lowered.

Publications that describe features of particular sailing areas, such as hazards, anchorages, etc.

The depth of the boat below the waterline; the amount of vertical distance from a boats water line to the bottom of it's keel.(2) The depth of water necessary to float a vessel(3) The belly or chord depth of the sail, its fullness

An object that might not allow safe operation. A group of rocks just under the water or a submerged wreck could be a navigational hazard.

Self Contained underwater Breathing Apparatus - see Aqualung.

A single inlet compressor with the impeller or impellers mounted on a shaft supported by two bearings in a pedestal, with the driver coupled to the compressor shaft.

Landfall. To reach shore.

Navy term meaning to change the arrangement of the colors (the national flag) upon getting under way or coming to moorings.