What did Leonardo da Vinci’s diving suit aim to help a diver do?

Leonardo da Vinci’s diving-suit design aimed to help a diver breathe underwater.

Leonardo described underwater equipment in the early sixteenth century, especially in notes associated with plans for naval operations. His concept included a mask, breathing tubes, and a system intended to connect the diver with air above the water. Some versions also included protective clothing and a container for collecting urine during a dive.

The design is often linked with Venice, where underwater equipment might have been useful against enemy ships. However, the surviving evidence does not prove that Leonardo built or tested the suit. His notes also include ideas for underwater exploration and possible sabotage, so later retellings sometimes exaggerate the military story.

Leonardo’s concept should not be confused with modern scuba gear. A modern scuba diver carries compressed gas, while Leonardo’s design depended on a surface air supply. The sketch remains significant as an early attempt to solve the practical problem of supplying breathable air underwater.