On square-rigged ships, the lines which are lead from the masthead to the ends of the yards to support them.

The inside center strand of rope.

Cargo landed in excess of the quantity on manifest.

The original name for the left side of the vessel when facing forward. The name was changed to Port to avoid any confusion with starboard, the right side of the vessel when facing forward.

A ported or closed cover for the end of a filter element.

A depth measuring device.

Combination minimum pressure valve and check valve.

A spar used to prevent the spinnaker guy from fouling on the stanchions.

A wind shift that forces a boat to sail below its mean wind course.

A freight booking made by a skipper or freight forwarder to serve space but not actually having a specific cargo at the time the booking is made. Carriers often overbook a vessel by 10 to 20 percent in recognition that "windy booking" cargo will not act ...

Permanent pip iron ballast specially shaped and placed along each side of keelson. Name is sometimes given to any iron ballast.

Fixed ports that do not open which are placed in the deck or cabin to admit light.

A machine employing two or more stages.

ACRONYM - National Pipe Thread standard. A description of a specific pipe thread

An enterprise in which there is a risk of loss.

An instrument that, once established, cannot be modified or cancelled without the agreement of all parties concerned.

Rolling a vessel, that is slightly ice-bound, so as to break the surface ice around her. May sometimes be done when a vessel is lightly aground, but not ice-bound.

To bagpipe the mizzen, is to lay it aback by bringing the sheet to the weather mizzen rigging.

To let out a line or sail slowly; to slacken or relieve tension on a line; to take pressure off.

To go aboard the vessel; to put onboard a vessel.