The distance between the water level at chart datum and an overhead obstacle such as a bridge or power line.

To unfold or unroll a sail. The opposite of furl.

Before the introduction of man-made fibers, much of the rope used at sea was made from manila. Made from the fibers of banana plants in the Philippines, manila did not rot when it was exposed to seawater.

To bring a sailing vessel head to the wind or as close to it as possible in high seas, maintaining a slight forward motion.

Maximum allowable working pressure. This data is found on the pressure vessel nameplate and is the maximum pressure at which the lowest set safety valve must be set (stamped).

In sailboat racing, to disturb the wind of a windward boat by positioning your boat a bit ahead and to leeward. If done correctly, the disturbed air hitting the windward boat will slow it down, leaving it at a distinct disadvantage and causing it to tack ...

An annual publication that contains tidal information and information about the position of the sun, moon, planets and stars. This information is used for celestial navigation.

The ability of a fluid that is insoluble in water to separate from water with which it may be mixed in the form of an emulsion.

(Delivered Ex Quay, [Duty Paid]) (...Named Port of Destination):A Term of Sale which means the DDU term has been fulfilled when the goods have been available to the buyer on the quay (wharf) at the named port of destination, cleared for importation. The s ...

Little or no wind and flat seas

(1) To float a vessel off the ways in a building yard after it is completed. (2) A small boat used to ferry people to and from a larger vessel.

Cargo more than eight feet high which thus cannot fit into a standard container.

Having a shape that that is not adversely affected by wind flowing past it.

Artificial objects to supplement natural landmarks indicating safe and unsafe waters.

Equipment used for serving meals.

A projecting aperture at the end of a tube, pipe etc. serving as an outlet for compressed air. Reduces the demand on the compressor by generating the highest thrust and volume for the lowest possible air consumption.

An indentation of the coastline between two headlands.

Stormy conditions, including rough, high seas and strong winds.

A day for general ship cleaning.

An international goods classification system for describing cargo in international trade under a single commodity-coding scheme. Developed under the auspices of the Customs Cooperations Council (CCC), an international Customs organization in Brussels, thi ...