Re: Coastal or Bluewater...
"If you are to make the boat a US documented vessel and it already is one (many in the size you might buy can be) then it''s a simple transfer fee and paperwork. You''ll then have US papers good any place you might go. Your country will have it''s own rules.[/QUOTE]"
One problem is that only US citizen can be the owner of documented vessel.
You will have to find out exactly what kind of documents would be required for Australlian authorities to register vessel. You will also have to pay some hefty import taxes if the boat you purchased is not made in US (or Canada?).