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

In trouble.

A listing of a particular boat's steering deviation on each point of the compass

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.

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 mast section next above the topmast and and below the royal mast. (2) The yard supported by that mast. (3) The third lowest square sail. It is stretched between the topgallant yard and the top yard.

Sailor's name for the north star, Polaris, which for all practical purposes remains fixed above the north pole, bearing north from everywhere in the northern hemisphere, making it a true aid to navigation.

To retire from a life at sea and settle ashore.

A device designed to remove solids, such as dirt, scale, rust and other contaminants from the air system.

A control line that adjusts tension along the foot of the sail, pulling the clew away from the tack; used to maintain proper sail shape.

Short period oscillation in level of enclosed, or partly enclosed, area of water when not due to the action of tide-raising forces.

Old sailing ship term for taking a nap.

When a vessel fills with water and sinks.

At or towards the stern or rear of a ship.

Same as not under command.

Break horse power

Tanks used for the storage of air discharged from compressors. They serve also to damp discharge line pulsations.

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

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

The outside plating of a vessel.