Do you know where your captain and cousin got their PCR test in St Thomas and how many hours/days it took to get the result? Did they then submit their results to the Puerto Rico travel portal and wait for approval, or just show up in Puerto del Rey with the results?

I'm trying to figure out the logistics to fly from US to STT to get my boat nd then enter into SVI. I have no problem getting the 5 day covid test to enter the USVI, but there's no practical way I can get a 3 day window test for entry to Puerto Rico/SVI while still at home in the US as I have at least 2 days tied up in flight to STT + provisioning of boat + sail to SVI.