(1) The rolled up part of a sail, tied with the reef lines, that is used to reduce sail area for heavy winds; To reduce the sail area. (2) A group of rocks or coral generally at a depth shallow enough to present a hazard to navigation.

As tight as can be pulled by hand.

A piece of trim, usually wood, used to cover and often decorate a portion of the boat, i.e., caprail.

Valve of a pump box; to prime a pump.

The foremost sail; a triangular shaped foresail forward of the foremast.

Packages loaded on a pallet, in a crate or any other way that enables them to be handled at one time as a unit.

Japanese tapered pipe thread (Female).

To reeve and secure a stopper (hold a strain on a line while transferring it).

That part of a ship's bow where the hawse holes and hawse pipes are situated.

Sailors' term for an old ship that needed a lot of paint and repairs.

A type of clutch which has a spring loaded jaw or detented rolling element to control torque in an assembly tool.

A lit navigational aid such as a lighthouse that can be used at night or in poor visibility.

The number of degrees of list a vessel has. The first indication that a vessel may need to reef is when there is too great an angle of heel.

Measurement ton 40 cubic ft or one cubic meter.Net ton, or short ton 2,000 lbs.Gross ton/long ton 2,240 lbs.Metric ton/kilo ton 2,204.6 lbs.Cubic meter 35.314 cubic ft.

The part of the upper deck which is abaft the mainmast, or in that general location of a ship without one. The quarterdeck was normally reserved for officers.

A small free-moving submersible designed for exploring the ocean depths.

To heave in until the vessel is riding nearly over her anchor.

Said of wind when exactly ahead; and of another vessel when her fore and aft line coincides with observer's line of sight.

Abbreviation for "Not Otherwise Indexed."

A charge made for lifting articles too heavy to be lifted by a ship's normal tackle.