Underwriters Laboratories

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.

Unit Logistics Management System

A procedure for determining the primary elements in a substance (carbon, hydrogen, oxygen, nitrogen, sulfur, and ash).

The maximum stress (tensile. compressive, or shear) a material can sustain without fracture, determined by dividing maximum load by the original cross-sectional area of the specimen. Also called nominal strength or maximum strength.

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

Electromagnetic radiation in the wavelength range of 4 to 400 nanometers.

Electromagnetic radiation of shorter wavelength than visible radiation but longer than x-rays, between 0.02 and 0.4 micron (200 and 4000 angstrom).

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

Urgent Marine Information Broadcast

Reserve Unit Management Information System

1.Unattended Machinery Space,2.Universal Measurement System.

United Nations

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 cast off or untie. (See BEND.)

To untie.

Thread - Unified national coarse.

The standard deviation of a sufficiently large number of measurements of the same quantity by the same instrument or method. The non-correctable part of the inaccuracy of an instrument, it represents the limit of measurement precision. The uncertainty of ...