It's called a BUI and it's as real as a DUI and you can even be charged for canoeing while drunk too! I guess, technically you can be busted for being under-the-influence on a bicycle as well. Here's what this site came up with-

North Dakota law prohibits operating a motorboat, vessel, or similar device while under the influence of drugs or alcohol. The term “vessel” means “any watercraft, other than a seaplane on the water, used or capable of being used as a means of transportation on water”—so not just boats with motors or engines.

I'm going to say going on a river tube crawl just might qualify you!  Not sure if you operate a tube or just float on it.  But, we can say if you're pulling a raft behind a boat while your drunk- you qualify!

Boaters are a separate slice of society.  There's recreational boaters puttin' around in their pontoons.  There's fishin' boaters with fish finders and treble hooks. Then there's speed boaters and jet skiers on the water for the rush.

Doesn't matter what type of operator you are- being sober on the water is just as important as being sober on the road.  KFYR TV is reporting that law enforcement is going to be as thick as a school of baby bull heads this 4th of July weekend.

It's called "Operation Dry Water" and they just want to make it safe on the water for everyone.  Including that friend on a tube you forgot you were pulling.

Many folks -and maybe it's you, consider boozin' a part of boating. I'm not going to lecture you- I'd just suggest you sip your suds from a passenger seat.

Happy 4th of July y'all!