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.

A term indicating a temperature relationship between two temperatures or temperature variation between two points.

The ship's water closet (toilet or wash-room). The upper edge of a quadrilateral sail.

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

An international goods classification system for describing cargo in international trade under a single commodity-coding scheme. Developed under the auspices of the Customs Cooperations Council (CCC), an international Customs organization in Brussels, thi ...

A yard or pole extending the head or foot of the topsail beyond the topmast or gaff of a gaff-rigged boat

A thermal expansion valve.

A pump which is used to deliver air to the aquarium. The pump pushes air through silicon tubing and to air stones or other aquatic decor. They are also an essential for UGF's (undergravel filters). An air stone is placed in each clear tube. When the air b ...

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

Away from land, toward the water.

An opening in a ship's deck for the loading and discharging of any kind of cargo.

Is the pressure exerted by a vapor confined within a given space. The vapor may be the sole occupant of the space, or may be associated with other gases.

Shifting the moving block of a tackle from one place of attachment to another place farther along to give more advantage.

(1) To float a vessel off the ways in a building yard after it is completed. (2) A small boat used to ferry people to and from a larger vessel.

The motion of air relative to a body in it.

Before the introduction of man-made fibers, much of the rope used at sea was made from manila. Made from the fibers of banana plants in the Philippines, manila did not rot when it was exposed to seawater.

To bring a sailing vessel head to the wind or as close to it as possible in high seas, maintaining a slight forward motion.

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

When compressed air is forced through a submerged perforated hose or pipe. Some applications include; ice prevention, reduction of salt intrusion, underwater basting, pneumatic breakwaters and general mixing and agitation

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