ଅର୍ଥ : Breathing device consisting of a bent tube fitting into a swimmer's mouth and extending above the surface. Allows swimmer to breathe while face down in the water.

ଅର୍ଥ : Air passage provided by a retractable device containing intake and exhaust pipes. Permits a submarine to stay submerged for extended periods of time.

ଅର୍ଥ : Dive with a snorkel.