Boatable

·adj Such as can be transported in a boat.

II. Boatable ·adj Navigable for boats, or small river craft.

boatable
Navigable for boats, or small river-craft.--Webster. This useful word has only recently been adopte...

Dictionary of American Words And Phrases by John Russell Bartlett.
boatable
Water navigable for boats and small river-craft. ...

The Sailor's Word-Book