What was Leonardo da Vinci’s underwater suit designed to let divers do?

Leonardo da Vinci’s underwater suit was designed to let divers breathe underwater.

His sketches show a diver wearing a sealed garment connected to the surface by breathing tubes. The proposed equipment included a mask and a system intended to provide air while the diver worked below the waterline. Leonardo associated the idea with military operations, including secretly approaching enemy ships.

The concept was not a modern scuba suit. A surface-connected breathing system limits how far a diver can travel, and Leonardo’s notes do not establish that he built or safely tested a complete working version. Modern diving equipment depends on carefully engineered regulators, tanks, pressure control, and materials.

The design is also sometimes called Leonardo’s diving suit or diving apparatus. Its historical importance comes from recognizing the practical problem of supplying air underwater and proposing a wearable solution centuries before modern diving technology.