Uncle Sam Boat Tours has operated guided sightseeing cruises in the 1000 Islands region of the St. Lawrence River from Alexandria Bay, NY since 1926, offering narrated tours including the Two-Nation Tour with optional stops at Boldt Castle.
Underwater Resources Inc. (URI) is a San Francisco-based commercial diving and marine construction company providing ROV operations, sonar imaging, dredging, and specialized underwater services across the U.S. and internationally.
Underwater Technics Inc. is a commercial diving and marine contracting company based in Cinnaminson, NJ, providing underwater inspection, repair, welding, and salvage services.
Underwriters Laboratories Inc. (UL) is an independent, not-for-profit product safety testing and certification organization providing global conformity assessment of hazardous locations, gas & oil equipment for more than 80 years.
Uni-Safe Electronics A/S, established in 1993, specializes in high quality salinometers, Bridge Navigational Watch Alarm Systems (BNWAS), and a wide range of electronic communication and safety equipment for the maritime industry.
Unidata America is the North American subsidiary of Unidata S.p.A., supplying environmental and meteorological monitoring instrumentation, data loggers, and telemetry systems for hydrological, marine, and coastal weather applications.