navigable river通航河流;通航河道
navigable stage通航水位
navigable construction通航构造
navigable areas可航渡区域
navigable technique通航技术
navigable wall导航墙
navigable limit可航极限
navigable waters可航水域;通航水域
navigable flow通航水流
ADJ（形容词） A navigable river is wide and deep enough for a boat to travel along safely. (河流)可航行的; 适于航行的 [正式]
...the navigable portion of the Nile.
...尼罗河的适航河段。