(n.) Heavy plank or timber extending fore and aft the whole length of a vessel's deck at the line of junction with the sides, forming a channel to the scuppers, which are cut through it. In iron vessels the waterway is variously constructed.

adolescent stream approaches aqueduct arroyo beck bed bourn braided stream branch brook brooklet burn canal channel creek creek bed crick culvert donga dry bed fairway flowing stream flume fluviation fresh freshet gill gulch gully gullyhole headrace irrigation ditch kill lazy stream meandering stream midchannel midstream millstream moving road navigable river nullah race racing stream river river bed riverway rivulet road run rundle runlet runnel sea lane seaway ship route sike sluice spill stream spillbox spillway steamer track stream stream action stream bed streamlet streamway subterranean river swash swash channel tailrace wadi water carrier water channel water furrow water gap water gate watercourse waterworks