I will be travelling to the US as a tourist for a few days (I have an ESTA, I'm from an EU contry). When you arrive at the border, you must fill a U.S. Customs and Border Protection Declaration Form 6059B, which the flight attendants usually give out during the flight. What should I put in the box "US street address (hotel/destination)"? I will be living on a boat that will not stay in the same port.
edit: a private boat, not commercial