A reversible propeller mounted in a tunnel running through the ship/s hull to give movement athwart-ships.

Dangerously steep and breaking seas due to opposing currents and wind in a shallow area.

To turn the boat head-to-wind so as to go about on the opposite tack

An indicator that signals pressure conditions.

Name given to the lowest deck in a ship.

Said to weigh.

Bell used for striking the half hours of each watch.

A writ issued by a court; requires that specific things be done.

A device used to keep a person afloat. Also called a life preserver, life vest, PFD or personal floatation device.

Cargo moving under Customs control where duty has not yet been paid.

A projecting aperture at the end of a tube, pipe etc. serving as an outlet for compressed air. Reduces the demand on the compressor by generating the highest thrust and volume for the lowest possible air consumption.

An L/C guaranteed by both the issuing and advising banks of payment so long as seller's documents are in order, and the L/C terms are met. Only applied to irrevocable L/C's. The confirming bank assumes the credit risk of the issuing bank.

To temporarily sew the ends of two ropes together for rendering through a block. Also to grip together parts of a fall to prevent running out. To marry strands to prepare for splicing.

The conversion of mechanical, electrical or magnetic energy into heat.

After a seam is caulked, to lay over it a narrow piece of canvas and then pour on hot pitch and tar .

Master of a sea-going vessel. Certificated officer competent and qualified to be master of a sea-going vessel.

In railcar or container shipments, the weight of the empty railcar or empty container.

Tightly woven cloth used for sails, awnings, covers, dodgers and biminis; slang for sails.

A letter of credit that requires the beneficiary to present only a draft or a receipt for specified funds before receiving payment.

A genoa jib. A large jib that overlaps the mast.