A deck with legs that can be jacked up or down. During operations, the legs rest on the sea-bed. When the rig is moved, the legs are retracted, leaving the rig floating. A jackup has normally no propulsion machinery of its own.

General Average

Measuring point for compressor acceptance test. Amount of condensate collected in the intercooler.

A beam attached to the top of the floors to add strength to the keel on a wooden boat.

Western Truck Lines.

A drive arrangement for power transmission to compressors.

A mast that is stepped (placed) on the keel at the bottom of the boat rather than on the deck. Keel stepped masts are considered sturdier than deck stepped masts.

The portion of the deck between the forecastle and quarterdeck of a sailing vessel.

A hand held rock drill worked by compressed air.

[meaning]

Abbreviation for "Transportation and Exportation." Customs form used to control cargo movement from port of entry to port of exit, meaning that the cargo is moving from one country, through the United States, to another country.

Used by some seamen to describe St. Elmo's Fire.

See "Free of Particular Average."

(1) A fore-sail flying above and forward of the jib, usually seen on bowsprit vessels. (2) A foresail used on yachts similar to a genoa, but cut narrower, with its leech not overlapping the mainsail, and a higher clew.

Fit and beautiful (describing a boat)

A material made of tarred hemp or manila rope fibers, used for caulking seams of decks and sides of a wooden ship in order to make them watertight.

Prefix before a ship's name to indicate that she is a steamship.

A look-out is stationed in a position to watch for danger ahead. To be on guard against sudden opposition or danger.

A small freshwater mollusk that was accidentally introduced to North American waters via ballast water from a transoceanic vessel. The zebra mussel has had significant negative economic and ecological effects: It clogs water intake pipes and attaches to a ...

A line or cable secured between two points and used as a support for various purposes.