navigable       
adjective uk/ˈnæv.ɪ.ɡə.bəl/ us/ˈnæv.ə.ɡə.bəl/
 (水域)可通航的,可航行的
(of an area of water) deep, wide, or safe enough for a boat to go through
  That stretch of river is too shallow to be navigable. 那段河道太浅,不能通航。 
 The area has hundreds of miles of navigable waterways.
 - More examples
 - The canal creates a navigable link from Albany straight down the Hudson River to New York.
 - Colombia has more navigable river miles than paved roads.
 - They went in search of the fabled Northwest Passage, a navigable water trade route to the Pacific.
 - We are offering teachers an easily navigable resource that will save them time.
 - Use menus and links to make your website more navigable.