A passage in a stretch of water where the sea or river bed has been deepened to allow access to large vessels.
 a main navigation channel of the mile-wide river
 Example sentencesExamples
-  A groundbreaking civil suit began in federal court to consider claims by property owners that the destructive effects of the hurricane were amplified by a poorly designed navigation channel adjacent to the city.
 -  Given that the boats patrol 240 miles of federal navigation channels in the harbor district, spotting small debris is not easy.
 -  Regular dredging operations are undertaken to maintain safe depths for shipping in the navigation channel and berths.
 -  Navigation channels and pipeline canals have brought saltwater into freshwater marshes, slowly killing them.
 -  The heavy rainfall carried down a great number of branches, weeds and other rubbish into the main navigation channel of the reservoir.
 -  As drawing boards fill with plans for dams, navigation channels and irrigation projects, the fragile ecology is in danger of collapsing.
 -  Old dredges stood ready to open the navigation channels should there ever be enough water.
 -  Other projects on the list include plans to deepen the Delaware River navigation channel for large ships.
 -  The wreckage lies on the edge of a main navigation channel of the mile-wide river.
 -  This act facilitated the mission of keeping navigation channels free of obstructions.