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Wikipedia's[3] MV Paul R. Tregurtha article gives 10 May 1981 as the ship's maiden voyage, following its 4 February 1981 launch as the William J. DeLancey.Launched as the William J. DeLancey and later renamed Paul R. Tregurtha, the Great Lakes' longest ship began hauling cargo with its maiden voyage on 10 May 1981.
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