A cylinder used to carry rotating machine parts, such as pulleys and gears, to transmit power or motion; such as a propeller shaft.

The dimensionless number obtained when the difference between maximum and minimum instantaneous shaft speeds during one period is divided by the arithmetic mean of these two.

The direction and speed of the wind as it appears to those on board, relative to the speed and direction of the boat; combination of the true wind and the wind caused by the boat's movement through the water.

(1) The underside of the hull that sits in the water (2) The ocean floor

Special vessels employed in exploration for, development of or continuous production of, subsea oil and gas.

The ratio of clearance volume to the volume swept by the compressing element.

(Free On Board) (...Named Port of Shipment):An International Term of Sale that means the seller fulfills his or her obligation to deliver when the goods have passed over the ship's rail at the named port of shipment. This means that the buyer has to bear ...

A ring or hoop of metal.

A nautical version of the national flag of the country usually flown at the stern. (2) Adopted by the United States Navy in 1862, the rank of a young officer equivalent to that of midshipman. The flag carried by a ship as insignia of her nationality.

Steel wire, used to support over-the-side sampling apparatus

In navigation, the smaller angle at which two position lines on a chart intersect. The fix will be more reliable as the angle approaches 90

devoid of water.

Person who assists in saving life or property from a vessel wrecked near the coast. Often applied to a small boat that lies in narrow waters ready to wait on a vessel, if required.

A light spar set fore and aft on a boat, serving as a spread for the boat cover.

On the land or aground.

Term used in the days of sail to indicate the starboard of the two anchors carried at the bow of a ship. The anchor on the port side was known as the small bower (although they were the same size).

The outside plating of a vessel.

Are load carrying machine elements permitting some degree of motion in which the lubricant is air or some other gas.

Is energy in transition and is defined in units of Force times Distance. Work cannot be done unless there is movement.

A course marked by buoys or ranges measuring one nautical mile. Measured miles are used to calibrate logs.