A thermal expansion valve.

A strong tropical counterclockwise revolving storm the southern hemisphere. In the northern hemisphere these storms revolve clockwise and are known as hurricanes.

[meaning]

A document required on merchandise imported into the United States.

That fleet of merchant ships owned by United States citizens or corporations and registered under flags of "convenience" or "necessity" such as Liberia or Panama. The term is used to emphasize that, while the fleet is not U.,$.-flag, it is effectively und ...

are registered in the United States and are subject to additional U.S. laws and regulations to which foreign-flag vessels are not. They must be owned by U.S. citizens, corporations, or governments and must be crewed mainly by U.S. citizens.

Abbreviation for the "Uniform Customs and Practice for Documentary Credits," published by the International Chamber of Commerce. This is the most frequently used standard for making payments in international trade; e.g., paying on a Letter of Credit. It i ...

Abbreviation for "Uniform Freight Classification."

UK Hydrographic Office abbreviations kgkg

Underwriters Lab.

(1) An old term to denote a lazy sailor who is of little use on the ship. (2) Damaged goods, especially provisions.

The space not filled with liquid in a drum or tank.

An instrument designed to detect the ultrasonic emissions and convert them to audible signal.

The cone-shaped shield at the top of the smokestack.

United Nations EDI for Administration, Commerce and Transport. EDI Standards are developed and supported by the UN for electronic message (data) interchange on an international level.

To untie.

Thread - Unified national coarse.

Freight that has not been called for or picked up by the consignee or owner.

Having no sails up. In heavy weather the windage of the mast and other spars can still be enough to move the boat.

A warning from aloft (heads up).