An open channel or trough used to direct or divert liquids.
A ravine or gorge, usually one with water running through.
To transport (logs of wood) by floating them along a water-filled channel or trough.
A hollow tube, held in the mouth, or mounted on and opening into a diving mask, used by swimmers for breathing underwater.
A snorkel parka.
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.