Waterway

[Sarah]

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

[Kai]

A river, canal, or other route for travel by water.

[Tariq Zaki]

a narrow area of water, such as a river or canal , that ships or boats can sail along