What kind of diving equipment did Leonardo da Vinci design for underwater work?

Leonardo da Vinci designed a diving suit for underwater work.

Leonardo’s early-16th-century sketches describe equipment intended to let a person remain underwater. The design included a full suit, a mask, and breathing tubes connected to a device at the surface. It was associated with military plans involving underwater operations and the possible concealment of divers.

The concept is often presented as an early predecessor of modern diving equipment. However, Leonardo’s proposed system was not an autonomous scuba apparatus: the diver depended on air supplied through tubes, and the drawings do not prove that the complete outfit was ever built or tested.

Some retellings add dramatic details about underwater sabotage, but those claims should be separated from what the sketches securely show. Leonardo was exploring the engineering problems of breathing, pressure, and movement underwater, not documenting a successful commercial diving system.