While all the ferries in service were built in the US, I believe Smiths is a USVI firm. Native Son and Caribbean Maratime Excursions (RTFF) are BVI. The Jones Act prohibits foreign flagged vessels from carrying passengers between US ports so USVI to BVI doesn't fall under the act. WE/Cruz Bay/Redhook may be a special acomodation due to location of the C&I locations. There can be special waivers. I believe the Vancouver/Bellingham route operates under one.

Travel is fatal to prejudice, bigotry, and narrow-mindedness, and many of our people need it sorely on these accounts. - Mark Twain