a navigable channel的用法和样例：
- navigable waters; a navigable channel.
- When a navigation channel is involved,approval shall be given by the river administrative department together with the navigation channel administrative department.
- A 42-foot navigation channel serves Wilmington.
- A navigable body of water, such as a river, channel, or canal.
- A navigable deep-water channel in a river or harbor or along a coastline.