The three-member western New York-based team said it discovered the shipwreck earlier this summer in deep water off Oswego, in central New York. Images captured by a remotely operated vehicle confirmed it is the Washington, which sank during a storm in 1803, team member Jim Kennard said.
"This one is very special. We don't get too many like this," said Kennard, who along with Roger Pawlowski and Roland "Chip" Stevens has found numerous wrecks in Lake Ontario and other waterways.
The 53-foot-long ship was carrying at least five people and a cargo of merchandise, including goods from India, when it set sail from Kingston, Ontario, for its homeport of Niagara, Ontario, on November 6, 1803. The vessel was caught in a fierce storm and sank.
At least three crew members and two merchants were on the sloop. All aboard died. According to Kennard, contemporary records said portions of the cargo and pieces of the ship were found the following day on shore near Oswego.
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Since there are no known drawings of the Washington, the sloop's discovery will help maritime historians learn more about the design and construction of that type of sailing vessel used on the Great Lakes between the American Revolution and the War of 1812, she said.
The oldest vessel found in the Great Lakes is HMS Ontario, a British warship that sank in Lake Ontario in 1780. Kennard and another explorer found that wreck in 2008.