The North Star; visible in the northern hemisphere and indicates the direction of north. In the southern hemisphere the Southern Cross is used to find the direction of south.

Railcars grouped in a train by destination so that segments (blocks) can be uncoupled and routed to different destinations as the train moves through various junctions. Eliminates the need to break up a train and sort individual railcars at each junction.

Placing a container where required to be loaded or unloaded.

That part of the water which is diverted from the main stream of a current and as a result flows in the opposite direction.

Flapping (of sails)

Froth of sea foam.

Another term for a marine railway.

A vessel's station bill showing duties of crew.

The location from which the boat is steered, usually in the middle or at the stern of the boat.

A single outlet or limited number of outlets in a building used to connect tools or equipment to the air system.

The wind direction indicator on the masthead.

A stationary element between stages of a multistage centrifugal compressor. It may include guide vanes for directing the flowing medium to the impeller of the succeeding stage. in conjunction with an adjacent diaphragm, it forms the diffuser surrounding t ...

A combination of one or more blocks and the associated tackle necessary to give a mechanical advantage. Useful for lifting heavy loads.

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

An official signature or seal affixed to certain documents by the consul of the country of destination.

The point (speed of sound) at which air flow through an orifice can not increase regardless of pressure drop.

Once the only method, other than human voice, of passing orders to men on board ship; the instructions to perform certain tasks were conveyed by different notes and pitches on the high-pitched whistle.

Scoop like devices used to direct air into and ventilate a boat.

In maritime warfare, a declaration published by a power forbidding sea-borne trade with an enemy.

Articles packed so that one rests partially or entirely within another, thereby reducing the cubic-foot displacement.