The following are clearance procedures for arriving by yacht into St. Vincent & The Grenadines.
Visiting yachts arriving in the territorial waters of St. Vincent & The Grenadines must proceed directly to a designated port of entry to complete clearance formalities before stopping at any other anchorage.
With Q flag hoisted, boats should dock or anchor in the port of entry and only the captain should go ashore taking along:
Boats must also clear out at one of the official ports before departing St. Vincent & The Grenadines.
Further information can be obtained from St. Vincent & The Grenadines Customs & Immigration.
See Yacht Fees here (PDF)...