A steam boiler on a ship deck used to supply steam to deck machinery when the main boilers are shut down.

To remove water from the boat by hand, bucket, pump etc.

A navigation instrument used to measure the apparent height of a landmark whose actual height is known, such as the top of a lighthouse. From this information, the ship's distance from that landmark can be calculated.

A temporary repair or replacement using improvised materials and parts.

Sailing on a run with the wind coming over the stern from the same side as the boom (danger of jibing).

The falling tide when the water recedes out to the sea and the water level lowers; a period or state of decline.

Above the upper deck (above).

Not attached to the shore or the ground in any manner. Usually, but not necessarily, moving through or making way through the water.

Term for disabled vessel that had to fall out of a convoy and thus became easy prey for submarines.

To move cargo up line to a vessel leaving sooner than the one booked. (See "Roll.")

An instrument used to keep a record of atmospheric pressure, such as on a paper drum.

To combine or charge with gas.

Is the force in newton required to move a fluid layer of one square meter area and a thickness of one meter with a velocity of one meter per second.

To let the sheet out slowly while maintaining control.

Also known as a preferred channel buoy. A red and green horizontally striped buoy used in the United States to mark the separation of a channel into two channels. The preferred channel is indicated by the color of the uppermost stripe. Red on top indicate ...

Angled frames in the extreme forward or aft ends of a ship which form the sharp ends of the vessel's hull.

A metal plate fitting on the deck that can be opened to take on fuel or water

A line rove through a single block secured aloft.

A mast that is stepped (placed) on the deck of a boat rather than through the boat and keel stepped. The mast of a deck stepped boat is usually easier to raise and lower and are usually intended for lighter conditions than keel stepped boats.

Underwriters Lab.