The pirate leader in question is John Martel. Historical records indicate these "gentleman" had taken a number of rich prizes just prior to venturing to St. Croix to careen (they had at least 2, maybe as many as four vessels...the historical accounts differ somewhat).
In any event, looking at the charts around St. Croix, the potential areas where this action might have occurred seem fairly limited.
The Scarborough was a Fifth-rate, so she probably would have drawn around 12 feet or so...obviously she was unable to get into the harbor or bay where the pirates were careening...
The only actual islands on the north side of St. Croix are Buck Island, Green Cay and Protestant Cay in present day Christiansted. The latter seems the natural choice, and if so, locating the wrecks would probably be impossible for various reasons.
But things may have changed in 300 years. Perhaps some of the present bars around the island were actually small islands themselves back in 1717...
I realize the Royal Navy and the pirates themselves probably thoroughly salvaged the sunken vessels, but I am not fixated on finding another Atocha. Any input, ideas or St. Croix stories would be appreciated. This just seems like a fun little look-see project to put together for a dive vacation. And, yes, I understand the legal issues. Look but don't touch.
These birds must have been very close to shore and in very shallow water...
