A form of steam engine where a piston moves back and forth inside a cylinder, transmitting its motion to a driving shaft by a connecting rod and crank.

Air pressure

On older sailing ships, a heavy piece of curved timber projecting from the bow for the purpose of holding anchors in position for letting go or for securing them after weighing.

Sailor's name for a block of sandstone used for scrubbing the wooden decks of a ship; seamen had to get down on their knees to use them. Large holystones were known as "Bibles", while smaller blocks to reach awkward places were known as "Prayer Books" ...

An attachment point for another object.

To spin out of control and capsize or nearly capsize; The turning of a boat broadside to the wind or waves, subjecting it to possible capsizing; a turning or swinging of the boat that puts the beam of the boat against the waves, creating a danger of swamp ...

To haul on a rope, to haul up tight, to hoist the last possible inch or so.

An additional extra tax.

The unofficial filtration industry description for filters designed to trap small size contaminants.

On square-rigged ships, an additional sail set in good weather outside the square sails when the wind was abaft the beam.

Old Latin name for the south wind.

A method of storing a sail, e.g., by rolling the jib around the headstay.

Is one in which there is no liquid injection and/or liquid circulation for evaporative cooling or sealing.

A pole used as part of the sailboat rigging, such as masts, booms, gaffs, yards, etc. A vertical spar is a mast.

The ratio of the isothermal power consumption to shaft input.

Cubic feet per minute (cfm) of air required at the inlet to the distribution system.

An abandoned vessel at sea (a danger to navigation) or Any abandoned vessel.

Wooden swells on each side of the after end of a boom, having sheaves through which to lead the leech reefing pendants.

Chocks which hold and anchor in place either in a locker or on deck.

A propulsion system for boats with an inboard engine operating an exterior drive, with drive shaft, gears, and propeller; also called stern-drive and inboard/outboard.