The distance from the surface of the water to the main deck or gunwale.

A structure of wooden or metal supports that make up the mounting for a ship's engine.

Iron or steel straps fastened diagonally across a ship's frames to make a rigid framework.

Old seafaring term meaning something very difficult or awkward. see Devil

The short foot rope at the end of a yard at the outer corner of a square sail used when reefing or furling.

A position based on estimations of a boat's position using estimated speed, currents, and the last known position/fix - of the boat.

The north end of the earth's axis and also called North Geographic Pole. The direction indicated by 000

Vessel said to be "on her beam ends" when she is lying over so much that her deck beams are nearly vertical.

A term commonly used in connection with a bill of lading. It involves the transfer of rights, title and interest in order to assign goods by endorsing the bill of lading.

To search for a sunken object by towing a grapnel along bottom.

A U-shaped fitting closed with a pin across the open ends, the pin sometimes being threaded at one end and sometimes held in place with a cotter pin, and used to secure sails to lines or fittings, lines to fittings, fittings to fittings, anchors to chain, ...

A fender made of granulated cork and covered with woven tarred stuff.

A concrete foundation with lateral supports which rests upon a number of steel springs. Designed to deal with disturbing frequencies in vibration isolation

Any point of sail with the wind coming from the side of the boat. If the wind is coming from directly over the side, it is a beam reach. If the wind is coming from forward of abeam it is a close reach. If the wind is coming from over the quarter, it is ca ...

Where the water and sky or ground and sky appear to intersect.

Running a compressed air system at a higher than needed pressure.

Abbreviation for "Master Container Freight Station." See CFS.

A line running from the stern of the boat to a dock or pier when moored.

Leave the vessel.

An extra or additional charge.