device used for breathing air from above when the wearer's head is face downwards in water
A snorkel is a tool that human beings use to breathe in water. A snorkel is a tube with two ends: One end goes in the swimmer's mouth. The other reaches up into the air. Then the swimmer, or snorkeler, can breathe.
- Kristy Wood (March 16, 2020). "How Does a Snorkel Work?". Ocean Scuba Dive. Retrieved April 2, 2021.