The type of bottom that the anchor is set in.

A metal pin by which the plating and other parts of iron and steel vessels are joined. Rivets are known by their heads, such as: Flush, pan, snap, plug, tap, countersunk, mushroom, and swollen neck.

A general term for provisions, materials and supplies used aboard ship for the maintenance of the crew, and for the navigation, propulsion and upkeep of the vessel and its equipment.

A draft that matures at a fixed or determinable time after presentation or acceptance.

Instructions given by a shipper to a bank indicating that documents transferring title to goods should be delivered to the buyer only upon the buyer's acceptance of the attached draft.

A valve which connects the high pressure side of a compressed air system to the suction side and is adjusted so as to maintain a specific pressure on the suction side by controlled bleeding of hot gas to the suction side.

Water which runs down and collects in the bilges of a ship and usually becomes foul and noxious.

A measurement. Parts per billion

A multihull with two hulls separated by a deck or crossbeams from which a trampoline is suspended; abbreviated "cat."

Shoal area between two navigational channels.

A liquid piston compressor is a rotary compressor in which a vaned rotor revolves in an elliptical casing, with the rotor spaces sealed by a ring of liquid rotating with it inside the casing.

Similar to a whip, an instrument of punishment where seamen were flogged on their bare backs.

That part of the total stroke which can be utilized repeatedly in actuator applications. It is measured starting at the compressed height and is the difference between the compressed height and the actuator height limit.

Hinged extension of the tiller which allows the skipper to control the tiller while hiking or sitting forward.

Cost of unloading a vessel is borne by the charterer.

In lore, the flag flown by a pirate ship - a white skull on a black background with crossed bones below the skull - although there is no evidence that such a flag was ever flown.

Placed at right angles to the keel, such as a transverse frame, transverse bulkhead, etc.

A valve designed to prevent air volume and pressure from escaping the compressor tank back into compressor heads while compressor is not operating.

To lie at anchor; to ride out; to safely weather a storm whether at anchor or underway.