A thick serge jacket worn by seamen while keeping watch at night or in stormy weather.

see Devil

Lie at anchor

(1) To stop moving. (2) Usually air travels smoothly along both sides of a sail, but if the sail is not properly trimmed, the air can leave one of the sides of the sail and begin to stall. Stalled sails are not operating efficiently.

A pointed spar driven into the bottom and projecting above the water; when driven at the corners of a dock, they are termed fender piles.

A machine which aspirates gas which has already been compressed and delivers the same at higher pressure.

The horsepower calculated from compressor-indicator diagrams. Applied only to displacement type compressors.

Devices that may be used to position the impeller or to protect the shaft.

A standard numerical code used by the U.S. Government to classify products and services.

Sideward force created by a spinning propeller.

Damage Free Car. Boxcars equipped with special bracing material.

Areas of corrosion.

A small boat designed to be rowed by use of its oars. Some dinghies are rowboats.

On a square-rigged ship, a light weather sail set next above the topgallant-sail in fair weather.

A tall buoy used as a navigational aid.

Sufficient movement through the water to allow the boat to be controlled and steered by the rudder.

Swing of the boom from one side of the ship to the other when the tack is changed.

The forward part of a boat's main deck.

The meridian from which longitude is measured eastwards or westwards. The longitude of the prime meridian, passing through Greenwich, England, is 0

The most important commercial measurement when the intrinsic weight of the cargo is so low that the ship becomes full without being loaded to the cargo line. Is expressed in cubic metres or cubic feet.