The deck chest in which the bos'n keeps his deck gear.

The metal axle of a block upon which the sheave revolves.

A measurement. Parts per million

The operation of tarring and blacking the rigging or hull to act as a preservative against the action of salt water. the best mixture was said to be coal tar, vegetable tar, and salt water boiled together and laid on hot.

See Terms of Sale.

To gain hydrodynamic lift, causing the boat to lift, rising slightly out of the water so that it is gliding over the water rather than plowing through it, reaching speeds in excess of those normally associated with its waterline length.

A load sufficient in size to fill a container either by cubic measurement or by weight.

The pressure encountered on the return side of a system.

A bow pivot line used in docking and undocking, or a dock line leading aft from the bow to prevent the boat from moving forward while made fast to a dock or pier.

An unhandy seaman.

A knot widely used when making a boat fast to a post or bollard.

Wing-like retractable devices extending from the sides of the vessel to dampen down rolling in seas and produce a steadier, smoother, and more comfortable motion.

A contract term meaning both parties agree to provide something for the other.

The portion of a safety/relief valve that surrounds the spring. The spring housing.

A compressor belonging to the group of displacement rotary compressors, a type of valve less displacement machine. Also referred to as "Roots blower".

Machines in which axial vanes slide radially in an eccentrically mounted rotor.

Old sailor's term for a flat calm with no wind.

Path through open water used for commercial vessel passage and so noted on chart

A stationary passage surrounding an impeller, in which velocity pressure imparted to the flow medium by the impeller is converted into static pressure.

Small marlinespike.