The art and science of designing vessels.

A low headroom space below decks used for provisions or spare parts, or miscellaneous storage.

The area (in sq inches) of the filter element that is exposed to the flow of air or fluid for effective filtering.

A line with a weight on the end used to measure depth. The lead is dropped into the water and marks on the line are read to determine the current water depth. The lead usually has a cavity to return a sample of the bottom type mud, sand, etc.

The velocity of the gas in the passages between the filter units in the filter house of a gas filter.

A small vessel fitted for towing.

Unlit navigational aids for use during the day. They mark a bearing to a channel when they are lined up one above the other. Leading lights are lighted at night and serve the same purpose.

Areas of the ocean lying between the mostly westerly winds of the higher latitudes, and the trade winds. These areas usually have prolonged calms, and in the older days of sail it could take quite a while to clear out of this area, by which time the seame ...

The temperature which would be measured at the stagnation point if a gas stream were stopped, with adiabatic compression from the flow condition to the stagnation pressure.

Heat cannot, of itself, pass from a colder to a hotter body.

A device for mounting cylinders.

Relay to all others in order (a signal repeated from one ship to the next astern in column).

A compressor designed to compress air or gas without contaminating the flow with lubricating oil. Piston rings and packing are usually made of TFE-based materials or carbon or other synthetic material that operate without lubrication.

Is the ratio of weight of vapor existing in a given space to the weight that would be present if the space were saturated at the space temperature.

A portion of the discharge gas is redirected through a heat exchanger and then expanded back to suction pressure, where it is mixed with normal suction gas stream and commonly used to compensate for process flow demands.

The opening up the back (aft) edge of the mast in which the mainsail luff rope slides when it is hoisted. Some masts have an external sail track.

Meddling or fooling around.

Towards the center line of a ship (towards the center).

A boat which uses the wind as its primary means of propulsion.

The surface of the water.