Er sorry.
If a ship (personal, not commercial -- a yacht for instance) were to leave an American port and just head off into the ocean, is there anything that he has to do? Â Anyone he has to say "goodbye" to?
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What about coming into port? Â It seems (I'm thinking of the pacific coast here) that there are so many goofy little peirs where you can dock a boat that just anybody could come wandering into the country. Â Are all boats that zip up to the US given a stamp of approval by the Coast Guard? Â If so, are they all inspected?
/me sighs ....
Well, the answer to question 1 is he has to have an annual USCG safety inspection. Which for a private boater means he has enough PFD's (lifejackets) for everyone and working running lights. But besides that no.
Personally I would tell someone where I was going, Ive had to do too many Search and Rescue missions where the guy just went out fishing with three or four of his buddies and never came back again. We did one for a prominent guy out of Atlantic City, eventually a Helicopter off our ship found some of the wreckage from their boat, but no bodies. But no you dont have to tell anyone where your going. Things you should have on your boat are an EPRB (Emergency Positioning Radio Beacon) and a radio with access to channel 16.
Part two.
No, the vessel would probably have to register with the local harbormaster (who would notify the CG if something were fishy... in theory)
We have the largest coastline of any nation in the world and only about 36,000 active duty Coast Guardsmen. There arent enough cutters to board and inspect everyone, which is why the war on drugs is so hard to fight. Still there are certain high profile vessels we would try to stop and board, boats with 3 or more outboards (called go fasts) boats with lots of deck space, boats from south america etc...
On a day outside of Miami or Los Angeles there are just way too many small craft to look out for.
On the merchant marine side we have a program called MISLE which lists every single merchant ship in the world, along with data about inspections, vessel history violations and the like. Merchant vessels have to clear their entry into port with the USCG Vessel traffic centers in big cities and USCG Captains of the Port in smaller ones. They also need to submit a 48 hour vessel notification of arrival or they will find US ports closed to them. It forms our boarding criteria. We comply with the UN SOLAS accords (safety of life at sea) which mandates certain types of inspections for the health and safety of the crew and also have lots of strict laws laid out in the CFR's or code of federal regulations.