Compressors in which successive volumes of air or gas are confined within a closed space, and compressed. They may be either reciprocating or rotating. (Trap air and then squeeze it to the desired pressure).

A marine hardware store.

A structure of heavy timbers placed between ground ways and cradle to support the ship during launching.

Wind coming from the south.

Is a compression in which the temperature of a gas remains constant.

Short lengths of line attached to the sail used to tie the extra sail out of the way when reefing.

A metal fitting with an arm that uses a spring to close automatically when connected to another object.

A type of journal bearing in centrifugal air compressors.

A traditional term in the British Navy for serving out an additional tot of rum or grog to a ship's crew. In sailing ship days the main brace was spliced (in terms of drink) in very bad weather or after a period of severe exertion by the crew.

Air or vapor given off or expelled as a byproduct or result of an operation or treatment process.

The mount and housing for the compass, usually located on the wheel's pedestal.

Blowdown.

Waterproof clothing.

A raised portion of the hull forward of the cockpit intended to prevent water entering.

To put out a mooring, hawser or line from a ship to a point of attachment outside her.

A vessel's station bill showing duties of crew.

The act of supporting anything by propping or shoring it up.

Same as two blocks.

Froth of sea foam.

Abbreviation for "Bales."