The Land Tortoise was a military transport ship built for service on Lake George, New York during the French and Indian War.

It is believed to be the oldest intact warship in North America, and is the only surviving ship of its type.

She was built by provincial militia forces under the direction of Captain Samuel Cobb of Falmouth, now Portland, Maine.

She was built in just over a month, launched, tested ("rowed well with 26 oars") and then two days later intentionally sunk by adding ballast with plans to re-float her in the spring of 1759.

[4] She was discovered in 1990, and was researched by a team of amateur divers guided by a professional archaeologist for four years.