A wooden wedge fitting into a drainage hole in the bottom of a boat for the purpose of draining the boat when she is out of water.

Blocks of wood made to fit in the hawse-holes, or holes in the half-ports, when at sea. Those in the hawse-holes are sometimes called hawse-blocks.

The senior engineer officer responsible for the satisfactory working and upkeep of the main and auxiliary machinery and boiler plant on board ship.

A symbol placed on packages for identification purposes; generally a triangle,square, circle, etc. with letters and/or numbers and port of discharge.

See "Overland Common Points."

A filter element whose medium consists of a series of uniform folds and has the geometric form of a cylinder, cone, disc, plate ... Synonymous with "convoluted" and "corrugated".

The highest navigation bridge. It usually includes an added set of controls above the level of the normal control station for better visibility.

The renting of a boat

When the distance between the wave crests is less than normal.

Also known as (U.S.) Federal Bill of Lading Act of 1916. U.S. federal law enacting conditions by which a B/L may be issued. Penalties for issuing B/L's containing false data include monetary fines and/or imprisonment.

Is the temperature at which oil begins to flow under prescribed conditions.

The pressure that would be produced by stopping a moving stream of liquid or gas.

Fluid cooling agent.

Towards, near, or at the bow; Prefix denoting at, near, or toward the bow.

A distress call made by a vessel requiring assistance. These three letters were chosen because they were easy to make and read using Morse Code. Some believe the letters meant "Save Our Ship" or "Save Our Souls".

A common measurement of the internal volume of a ship with certain spaces excluded. One ton equals 100 cubic feet; the total of all the enclosed spaces within a ship expressed in tons each of which is equivalent to 100 cubic feet.

A block with a single sheave which is hinged and opens on the side so that the bight of a line can be led into the block and closed without running the whole length through

A machine used to pick up and move goods loaded on pallets or skids.

To measure the depth of the water with a lead. Also said of a whale when it dives to the bottom.

A valve which enables pressure to be reduced, or kept constant at a desired level.