snorkel

A breathing apparatus for swimmers and surface divers that allows swimming or continuous use of a face mask without lifting the head to breathe, consisting of a tube that curves out of the mouth and extends above the surface of the water.

A retractable vertical tube in a diesel-engine submarine that contains air-intake and exhaust pipes for the engines and for ventilation, permitting extended periods of submergence at periscope depth.

To swim or dive under water with a snorkel and often with a face mask and fins.

A hollow tube, held in the mouth, used by swimmers for breathing underwater.

A retractable tube fitted in diesel–engine submarines to allow sufficient ventilation that the engines may be used at periscope depth.

To use a snorkel.

air passage provided by a retractable device containing intake and exhaust pipes; permits a submarine to stay submerged for extended periods of time

dive with a snorkel

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