Attn. Siberian Sea
I never heard that you can enter the continental US or even the USVI by
boat without a Visa. Where is a special way to enter the USVI befor by public transportation eg.
ferry and after to enter without VISA but having en entry stamp from US Immigration in your passport.
But that what you are writing about are the rules for
French Polynesia. For the US you have to apply for a Visa before entering if trying to enter you will be fined. That as written on the homeland
security office on St. John Island USBVI and warnings for trying to enter US territory are published in the BVI's.
No way without Visa, apply for one in your home country. It is a little complicated as you have to ask in person. For my self when sailing I applied in Port of
Spain.
If in doubt ask the US Embassy or look at noonsite.com USA immigration.
Good luck.