Capable of being navigated; deep enough and wide enough to afford passage to vessels; as, a navigable river.

In Wisconsin, capability of floating a canoe at any time of the year; normally, any waterway with a defined bed and banks.

capable of being sailed (or boated) on or through

An area with sufficient depth of water to permit vessel passage.

able to be sailed on or through safely; "navigable waters"; "a navigable channel"

Capable of being travelled upon by a ship

waterway deep enough and wide enough to afford passage to ships

Capable of being navigated or passed over by ships or vessels.

A waterway is navigable if it has bed and banks, and it is possible to float a canoe or other small craft in the waterway on a regular reoccurring basis - even if only during spring runoff.

wide or deep enough to be traveled on by ships