- a device permitting a submarine to remain submerged for prolonged periods, consisting of tubes extended above the surface of the water to take in air for the diesel engine and for general ventilation and to discharge exhaust gases and foul air.
- a hard rubber or plastic tube through which a swimmer can breathe while moving face down at or just below the surface of the water.
- to engage in snorkeling.
- a device allowing a swimmer to breathe while face down on the surface of the water, consisting of a bent tube fitting into the mouth and projecting above the surface
- (on a submarine) a retractable vertical device containing air-intake and exhaust pipes for the engines and general ventilation: its use permits extended periods of submergence at periscope depth
- a similar device on a tank, enabling it to cross shallow water obstacles
- a type of parka or anorak with a hood that projects beyond the face
- to swim with a snorkel
