I dove the Grove several times, including last week and it's a great dive. It's an advanced dive for a few reasons: Current, overhead environments and depth. If you have the training and experience to handle all of them at once, go for it, with a captain, divemaster and buddy you trust. The crews know the site and all the challenges that go with it, so listen to the dive briefing, and ask questions.
Some points to keep in mind:
Look at the sea state, if it's too high, a snorkel is only good for a drink of salt water. Breath through your reg, it's easier. NB, the sea state can change while you are underwater, so plan for it
There are often currents, and they can show up suddenly, so hold on to the ascent/descent line. On the wreck itself, you can almost always find a way to put the hull between you and the current. Getting down low to the deck and pulling yourself along rather than finning gives a lot of protection too. Start the dive into the current: it makes the swim back much easier.
The swim throughs are cool, but you can come out in a current, so be ready. Not everything got sealed, so it is possible to do a penetration dive (but DON'T). If you don't know the difference, don't go in. The Grove is way cool even without the swim through.
Check your SPG and computer more often than you think you need to. You use air pretty quick, and you can run out of bottom time, too. Head back to the mooring line with at least 1000 psi left, and hang on while you make a nice slow ascent and safety stop. (I dove it on ean 34 for even more safety margin) Try to get back to the right ascent line. If you can't, there are lots of them and any line is better than an open water ascent, though an open water ascent is better than drowning. If I came up on the wrong line, I would be reluctant to try a surface swim to the boat if there was any kind of sea state or current running.
I can't take credit for the above, most of it came from the briefing by Captain Tony of the Scuba-Do, who consistently gave the best briefings of any boat I saw in the Keys. It helped make me feel safe.
It seems to me that the crew of the RR did a great job with a diver who got in trouble on the surface. Yes, it looks like it started with some bad decisions underwater (bad navigation and/or air management) but however it happened, we have a diver breathing through a snorkel with too much sea running. MAYBE a boat with fewer divers could have done a quicker recovery and helped the diver quicker, but maybe not, too.
JC
Web Monkey:
I'd love to dive the Grove, but I'm never sure how seriously to take the warnings. I'm not sure if they're trying scare off recently minted AOWs with 20 dives, or if it's a real problem where the current is going to rip me off the wreck at a moment's notice.
Is the current any worse than Cozumel, for example?
Terry