The typical winds for a particular region and time of year.

A rope used for additional support or for additional securing, e.g., preventer stay.

Also known as PM, maintenance performed according to a fixed schedule involving the routine repair and replacement of machine parts and components.

Small marlinespike.

Money paid by shipper to Master of ship for diligence in care of cargo. Not now paid to Master, but added to freight. Amount was usually about 1% of freight.

The meridian from which longitude is measured eastwards or westwards. The longitude of the prime meridian, passing through Greenwich, England, is 0

A ship owned and armed by a private individual that is empowered by a government to fight with enemy ships and capture enemy shipping in time of war.

A vessel which, according to the applicable Navigation Rule, has right-of-way. Also known as the "stand on" vessel.

One which has the right of way.

An enemy vessel captured at sea by a privateer or a ship of war. The term is also applied to contraband cargo taken from a merchant ship.

A Latin term meaning "For the sake of form."

An invoice provided by a supplier prior to the shipment of merchandise, informing the buyer of the kinds and quantities of goods to be sent, their value, and specifications (weight, size, etc.).

A Latin term meaning "In proportion."

Occurs whenever the system undergoes either a change in state or an energy transfer at a steady stare.

The acting of one person on behalf of another; a document authorizing one person to act on behalf of another.

Equipped to extract petroleum, e.g. oil production ship.

Estimated account

Single tariff item, established to move multiple commodities needed for a specified project, usually construction.

A blast of from 4 to 6 seconds' duration.

Sideward force created by a spinning propeller.