The David W. Taylor Naval Ship Research and Development Center (DTNSRDC) conducted full-scale trials to gather tug/ship interaction forces developed by an advanced, right-angle drive tugboat (TINA) in maneuvering a tanker (YUKON). The overall intent of these trials is to modify the 'tug effect' subroutine at the Maritime Administration Computer Aided Operations Research Facility (CAORF) at Kings Point, New York by developing, from the full-scale trial data presented herein, percentage factors to discount nominal tug thrust under appropriate situations to approximate the effect of flow conditions around the tug propellers created by motion of the tug, or the position of the tug relative to the tanker.
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