Yes you have to register the boat if you use electric.

I used one on mine db. I was able to go upstream in slow current. I could have rowed as well. I am undecided as to it usefulness. Not having it on the boat means less stuff to get in the way. Wife not as likely to lose nice steelhead when you screw up and get the boat backwards.
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To fish or not to fish
What a stupid question

I fish therefore I am