Proselyte Reef comprises five ridges that are probably old lava flows.
Several buoys enable dive stores to dive different parts of the reef on different occasions.
The reef lies just outside Philipsburg. The story of H.M.S. Proselyte , after which the site is named, is a sorry tale. The shoal that the ship hit was charted and the crew knew it was there. The 17-foot draft of the ship required the crew to pass around and not over the shoal, but failure to allow for the current caused the ship to founder. The British did not take kindly to losing this small, fast frigate and the commander, who was not on board at the time, was court martialled.