|Builder||D. & W. Henderson & Company, Ltd., Glasgow|
|History||SP-166, purchased by the U.S. Navy on June 1, 1917 from George W. C. Drexel of Philadelphia.|
U-boat attacks on Navy Yacht Alcedo
|1||5 Nov 1917||UC 71 (Ernst Steindorff)||Sunk||Torpedoed off Penmarch||47° 23'N, 4° 44'W||21|
Position of attack on Alcedo
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