HMS Ontario was a 22-gun snow of the Royal Navy, constructed in 1780 on Carleton Island, located in the St. Lawrence River area of New York. At approximately 80 feet (24 meters) in length, she was the largest British warship to operate on the Great Lakes during her time. Designed as an armed transport, Ontario served under the Provincial Marine, primarily ferrying troops, supplies, and prisoners across the remote regions of New York. She was launched just five months before her sinking and did not see combat during her brief service. The vessel’s dimensions and armament made her a significant presence on Lake Ontario. She was a relatively small ship by oceanic standards but held strategic importance inland, being the most sizable British warship on the Great Lakes at the time. Her operational role was primarily logistical rather than combat-oriented. Tragically, HMS Ontario sank in a storm on 31 October 1780 while en route from Fort Niagara to Oswego. The sinking resulted in the loss of approximately 80 men, including sailors, soldiers from the 8th and 34th Regiments of Foot, members of the Royal Artillery, rangers, a passenger, and four Native Americans. The shipwreck remained undiscovered for over two centuries, with the loss kept quiet initially to conceal the extent of the naval disaster. The wreck was finally located in 2008 using side-scan sonar technology in Lake Ontario, at a depth exceeding 492 feet (150 meters). The high-resolution sonar images revealed an upright, largely intact ship with two masts extending at least 70 feet (21 meters) above the lakebed. The discovery was confirmed through remotely operated underwater vehicles. Due to the cold, fresh water of Lake Ontario, the wreck has been remarkably well preserved, with the ship remaining largely intact after more than 230 years on the lake bottom. The site is considered a war grave and remains the property of the United Kingdom, with its exact location kept confidential. The discovery of HMS Ontario offers valuable insight into naval history and ship construction during the American Revolutionary War era.

This description has been generated using GPT-4.1-NANO based on the Vessel's wikidata information and then modified by ShipIndex.org staff.