The United States Coast Guard 175-ft WLM buoy tenders are designed to perform Aids to Navigation (AtoN) in the major rivers and coastal waters during the winter ice season. No dedicated ice performance measurement program had been conducted when these vessels entered service. Therefore, in January 2011, USCG SFLC ESD, Science and Technology Corporation, and the crew of the USCGC Katherine Walker conducted such ice trials on the Hudson River in various ice conditions including level, broken, and brash ice. These tests were used to document the performance for an icebreaking operations manual for the ships. This paper describes the results of icebreaking performance measurements.

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