Amount of unused space in a ship or a hold by virtue of the irregular shape of the cargo.

Is one that does not enter into known chemical combination, either with itself or another element. There are four known gases of this type: helium; neon; argon and krypton. or a gas that does not supply any of the needs of combustion.

The top of a wave.

States that equal volumes of all gases under the same conditions of pressure and temperature contain the same number of molecules.

The black line parallel with ship's keel marked on the inner surface of the bowl of a compass, indicating the compass direction of the ship's head.

A vessel is in soundings when she is in sufficiently shallow water for soundings to be made and used as an aid in the vessel's navigation.

Heavy latch by which doors, hatches, portholes, etc., are secured; verb - to latch

The direction of an object (with reference to you, your ship, another object).

A published rate that is never assessed because no freight moves under it.

A method of payment for goods in which the buyer pays the seller in advance of the shipment of goods. Usually employed when the goods, such as specialized machinery, are built to order.

Said of a vessel when the depth of water can be measured by the lead (within the 100 fathom curve).

Any point of sailing away from the wind.

To let go.

An important parameter in establishing an entrained particle's potential to impinge on control surfaces and cause erosion.

An illegal form of discounting or refunding that has the net effect of lowering the tariff price. See also Malpractice.

The warehouse or public stores to which samples of imported goods are taken to be inspected, analyzed, weighed, etc. by examiners or appraisers.

A number system used to describe wind forces and sea conditions from 0 for a flat calm to 12 for a hurricane

A dinghy or raft that can be inflated for use or deflated for easy stowage.

Machines in which the compressing element is a piston having a reciprocating motion in a cylinder.

The direction at right angles to a ship's heading or the line of her keel