ACRONYM - Actuator

When a perfect gas flows through a throttling with constant inlet and outlet pressures, the temperature of the gas is the same before and after it flows through the throttling. There is a temperature drop, however, during the passage of gas through the th ...

To lay the head yards abox in a square rigged sailing vessel was to lay them square to the foremast in order to heave-to.

Combined supply and anchor-handling ship. Seismic ship: Conducts seismic surveys to map geological structures beneath the sea bed.

In order to obtain the clean bill of lading, the shipper signs a letter of indemnity to the carrier on the basis of which may be obtained the clean bill of lading, although the dock or mate's receipt showed that the shipment was damaged or in bad conditio ...

Lying almost beam on to strong winds and being driven before them while under bare poles (without sails up). The helm is lashed so as to point the vessel into the wind, but it continually falls away because of the pressure of the wind. It is a technique f ...

Stand watch, during which they steer the vessel, stand lookout, assist the mate on watch and make rounds of the ship to insure that all is in order. They also tie up and untie the vessel to and from the dock and maintain the equipment on deck.

Construction made by placing several platform flats end to end in a ship.

1. Loose, not on moorings or towline.2.Floating at random; not fastened by and kind of mooring; at the mercy of winds and currents; loose from normal anchorage. A vessel is said to be adrift when she breaks away from her moorings, warfs, and so on. t – ...

To hold the mainsail or jib off to the side to cause the wind to blow onto the backside of the sail, used to slow a boat

The U.S. Customs' "Automated Manifest System."

U.S. Customs' master computer system, "Automated Commercial Systems."

The machine by which, when dropped to the bottom, the vessel is held fast.

States that the pressure of a gas, at constant volume, varies directly with the absolute temperature.

To stop a boat and maintain position (with some leeway) by balancing rudder and sail to prevent forward movement, a boat stopped this way is "hove to"; such as when in heavy seas. The idea is to bring the wind onto the weather bow and hold the ship in tha ...

(1) A cargo carrying vessel, usually without an engine, towed or pushed by a tug. Small barges for carrying cargo between ship and shore are known as lighters. (2) Also a term in sail racing - a boat which forces its way illegally between another contesta ...

A cleat that attaches to the backstay over the cockpit, usually used for hanging a lantern

A pallet so designed that the forks of a fork lift truck can be inserted from two sides only.

A sliding or hinged opening in the deck, providing people with access to the cabin or space below; an opening in a boat's deck fitted with a watertight cover.

A member of the deck crew who is able to perform all the duties of an experienced seamen; certificated by examination; must have three years sea service. Also called Able Seamen and A.B.