A crack or hole that accidentally admits a gas or lets it escape.

To charge more than the proper amount according to the published rates.

Abbreviation for "Government Bill of Lading."

Sailor's phrase for a seaman who has died.

An instrument for measuring, testing, or registering.

An officer taking his turn as officer of the watch.

Upward displacing swells.

A volume. Pounds per hour.

An empty wine bottle after its contents have been drunk.

A double block where the two sheaves lie in a plane one below the other, rather than alongside each other.

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

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

Openings in the bottom or transom of a boat to drain water when sailing.

Measuring point for compressor acceptance test. Pressure at the point of use.

To continue sailing under the same canvas despite the worsening of the wind.

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

Sailing other than close; hauled or into the wind (wind astern).

Sailing close hauled. Sailing toward the wind as much as possible with the wind coming from the bow.

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.

The first plank on the outer hull of a wooden vessel next to the keel. In steel ships, the plating next to the keel, or what is known as strake A.