Enjoy! Red Hook Dive Center and I understand they are open for business. I worked on St. T between 2014 - 2015 and used them. Few miles down the road from Coki. The ownership has changed and I've only been out with the new owners once, but found them to be just as involved as the former owner. (Actually the former owner was there when I popped down late 2016, guiding them through the transition and he was able to join me diving). The diving is OK, beats not diving, and I did see some really cool things. Sharks on almost every dive - black tip and/or reef sharks, nurse sharks everywhere. Lots of turtles, lobster, normal reef fish. Found my first pipefish! That was cool. Swim throughs on several sites. Only got out to the deeper more advanced sites a couple times, French Cap being the best.
Coki is guided shore diving, but there isn't much to see, mostly sand bottom, abandoned lobster pots. The best about Coki diving back in the day was seeing the hardhat bottom walkers over by the aquarium. Max depth wasn't all that deep, currents got a bit tricky at couple points and they fed MilkBone dog biscuits to the snapper on the way back in. Which created a feed frenzy as the treats broke up and I ended up getting bit by a snapper.