Urea Carrier.

Upper Explosive Limit

Upper Flammable Limit

Ultra High Frequency. (300-3000 MHz) The apparatus using these frequencies are the best one for internal communications on steel ships as they are not hampered by steel bulkheads.

Ultra High Pressure

United Kingdom Mutual

United Kingdom Association of Private Terminal Operators

UK Harbour Masters Association

UK Major Ports Group

UK Pilots Association (Marine).

Ukraine (Flag)

Underwriters Laboratories

Unit Logistics Management System

Urgent Marine Information Broadcast

Reserve Unit Management Information System

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

United Nations

To cast off or untie. (See BEND.)

United Nations Convention on the Law Of the Sea

United Nations Conference on Trade and Development