Space between the floor of holds and the bottom of the ship.

Stormy conditions, including rough, high seas and strong winds.

A type of anchor with a heavy inverted mushroom shaped head. Mushroom anchors are used to anchor in mud and other soft ground.

A method of preventing the ends of a line from unlaying or fraying by turns of small stuff, stout twine or seizing wire with the ends tucked.

Standing or running (adjustable) wire rigging that supports the mast from the stern; a wire mast support leading aft to the deck or another mast

A thin, flexible wooden or plastic strip inserted into a pocket (batten pockets) on the back part (leech) of a sail to stiffen it and assist in keeping its form.

International data interchange standards sponsored by the United Nations. See UN/EDIFACT.

A strong tropical counterclockwise revolving storm the southern hemisphere. In the northern hemisphere these storms revolve clockwise and are known as hurricanes.

Artificial objects to supplement natural landmarks indicating safe and unsafe waters.

Holes cut in a plate to make it lighter and yet not reduce its strength.

Maximum allowable working pressure. This data is found on the pressure vessel nameplate and is the maximum pressure at which the lowest set safety valve must be set (stamped).

Kilo or metric ton. 1,000 Kilos or 2,204.6 pounds.

A place suitable for anchoring in relation to the wind, seas and bottom.

A rope used for towing or, mooring.

A platform with or without sides, on which a number of packages or pieces may be loaded to facilitate handling by a lift truck.

Away from land, toward the water.

Having a shape that that is not adversely affected by wind flowing past it.

Guarantee issued by a bank to a carrier to be used in lieu of lost or misplaced original negotiable bill of lading.

A small rail on tables and counters used to keep objects from sliding off when the vessel rolls and pitches.

To unfold or unroll a sail. The opposite of furl.