USS Grampus may refer to: USS Grampus, a schooner built to suppress piracy and catch slavers, was launched in early August 1821, had a small part in the Amistad trials and was lost at sea in March 1843 USS Grampus, was a side-wheel steamer, originally named Ion, was used as a receiving ship for the Mississippi Squadron during the American Civil War USS Grampus was Submarine Torpedo Boat No. 4, which was renamed A-3 and patrolled Manila Bay during World War I USS Grampus, originally named Boothbay, was 1,708 tons and 126 feet long, built by Neafie and Levy, of Philadelphia. Wikipedia