Re: Storage of firearms on board
By way of partially answering my own question this is from the Oregon Hunter Safety Course (my state). "The same rules apply as when transporting firearms in a vehicle—unload and case firearms before transporting them. The action should be open or the gun broken down, whichever makes the firearm safest. " However I'm not sure this is correct. I'm pretty certain what would happen if I started shooting ducks from my car.
Elsewhere, Oregon states that their LEO will enforce boating regulations out to the 3-mile limit.