Most Are Boat Licenses
Local (statewide) laws govern much of the licensing requirements for small craft (not-for-hire). Generally, it is a registration fee for the craft in a state's jurisdicton. There are allowances for temporary passages (under several months). As far as operator licensing, there is no Federal requirement and none for most states. Hope this helps, and, to other posters, please fill in where I am wrong. Rick D.