Gross tonnage is the basis on which manning rules and safety regulations are applied, and registration fees are reckoned. Port fees are also often reckoned on the basis of GT and NT. GT and NT are defined according to formulas which take account, among ot ...

Six feet. Comes from the Dutch word "fadom" which was the distance between fingertips of outstretched hands.A unit of measurement relating to the depth of water or to the length of line or cable; one fathom is 6 feet or 1.83 meters

The Captain of a vessel. Highest officer aboard ship. Oversees all ship operations. Keeps ships records. Handles accounting and bookkeeping. Takes command of vessel in inclement weather and in crowded or narrow waters. Handles communications.

CFM flowing through the compressor inlet filter or inlet valve under rated conditions

Sailing with the tiller over to leeward by force of the wind

The increase in pressure in the discharge header that develops as a result of flow after the pressure relief device opens

A wind shift that forces a boat to sail below its mean wind course.

Capable of keeping out water.

A fix taken by visually observing the location of known landmarks.

Measurement ton 40 cubic ft or one cubic meter.Net ton, or short ton 2,000 lbs.Gross ton/long ton 2,240 lbs.Metric ton/kilo ton 2,204.6 lbs.Cubic meter 35.314 cubic ft.

The highest continuous deck which runs the full length of the ship without a fall or interruption.

An instrument that, once established, cannot be modified or cancelled without the agreement of all parties concerned.

Abbreviation for "Not Otherwise Indexed."

The top of a mast.

The action of letting go the sheets of a sailing vessel, thus spilling the wind and reducing the forward motion of the boat.

The windward side (from where the wind is blowing).

A tiller or a wheel generally installed on the bridge or wheelhouse of a ship to turn the rudder during manoeuvering and navigation. It is in fact the steering wheel of the ship.

At a considerable distance.

The ring bolted to the upper end of the shank of an anchor and to which the bending shackle secures.

U.S. Customs' automated program under AMS. It allows for electronic reporting of inbound (foreign) cargoes in the U.S.