Turtle (submersible)

Turtle (also called American Turtle) was the world's first submersible with a documented record of use in combat. She was built in 1775 by American David Bushnell as a means of attaching explosive charges to ships in a harbor. Bushnell designed her for use against British Royal Navy vessels occupying North American harbors during the American Revolutionary War. Connecticut Governor Jonathan Trumbull recommended the invention to George Washington; although the commander-in-chief had doubts, he provided funds and support for the development and testing of the machine.

Several attempts were made using Turtle to affix explosives to the undersides of British warships in New York Harbor in 1776. All failed, and her transport ship was sunk later that year by the British with the submarine aboard. Bushnell claimed eventually to have recovered the machine, but its final fate is unknown. Modern replicas of Turtle have been constructed; the Connecticut River Museum, the U.S. Navy's Submarine Force Library and Museum, the Royal Navy Submarine Museum and the Oceanographic Museum (Monaco) have them on display.

The American inventor David Bushnell conceived of the idea of a submersible for use in lifting the British naval blockade during the American War of Indepedence. Bushnell may have begun studying underwater explosions while at Yale College. By early 1775, he had created a reliable method for detonating underwater explosives, a clockwork connected to a musket firing mechanism, probably a flintlock, adapted for the purpose. According to Dr. Benjamin Gale, a doctor who taught at Yale, this and other mechanical parts of the submarine were manufactured by a New Haven clockmaker named Isaac Doolittle. After the Battles of Lexington and Concord in April, Bushnell began work near Old Saybrook on a small, individually-manned submersible designed to attach an explosive charge to the hull of an enemy ship, which, he wrote Benjamin Franklin, would be, “Constructed with Great Simplicity and upon Principles of Natural Philosophy.”

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