I am . . . curious about how many tech diving opportunities there are around the east coast (primarily SE) and Caribbean. Not cave/cavern, more deep wreck. What awesome sites do tech divers like to visit
You have received some good suggestions for FL. I personally like the Hydro Atlantic a lot, and it is an easy boat ride compared to many deep wrecks.
In NC, there are a number of wrecks that you can dive that are appropriate for technical / decompression diving. On the shallow end of the spectrum, the Tarpon comes to mind - a fun dive if the vis is good, as it is a hangout for sand tigers. The Manuela is one of my favorite dives. At ~160', it is possible to carry enough gas to make a reasonably long dive on the wreck, followed by a comfortable deco schedule. At the deeper end, the Malchace (~206') and the EM Clark (~250') are sought-after (at least by some) tech dives. The Monitor is in some ways a 'box check' dive - glad to do it for the tremendous historical significance but other wrecks are perhaps more enjoyable. However, it is certainly high on the list of NC coast tech dive opportunities.
A couple of comments about diving the NC coast. As several posters have noted, it is not at all uncommon to get blown out of a tech charter. It took me several years to actually make it down to the Clark, between a charter cancelled before the weekend even started because of a daunting weather forecast, to having the second and third days (planned Clark days) of a 3 day charter cancelled because weather came up overnight after the first day, to actually getting to the wreck site only to find that there was a ripping current that precluded a safe dive attempt. Once I made it, the wait was worth it. But, it took a while. In addition there are only certain boats that go to these wrecks, and their schedules often fill up early in the Spring. I personally like going out with JT Barker, on the Under Pressure (
Capt JT's Wreck Diving Site - Diving Hatteras NC and Virginia Beach VA), but there are several other boats that offer tech opportunities off the NC coast. And, under the proper conditions, you can
sometimes arrange to make a deco dive on 'recreational' wrecks (e.g. the Normania, at 115') IF the plan for the charter is to make two dives on the same wreck, and IF the captain knows you / trusts you, etc. I have done that and it can be a lot of fun - essentially you and your buddy are alone on the wreck while the others on the boat are doing their surface interval between dives, then you are coming up as the others are making their descent for the second dive.