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Especially at a site like the grove? How do you figure?
The SG is an ADVANCED site. If you want to successfully dive it, you had better be an ADVANCED diver - not only holding an advanced/deep certification from any agency, but actually having advanced skills and relevant (deep, swift current, etc.) vast experience. If not, then this dive is beyond your training, skills, and experience, and you should not do it. Like someone else has said, if you require assistance beyond what you and your buddy can provide to yourselves and each other, you should not be on this dive.
Can you imagine if there were rescue divers waiting nearby the Grove? It could give courage to all kinds of divers who are not ready to dive her. Why do you think some places with cave diving like Ginny Springs do not allow non-cavern/cave-certified divers to use lights in their system? It helps to keep unqualified divers out of trouble by not giving them a false sense of security. "I can see in there = I'll be ok".
There are many wrecks in the Great Lakes here in Canada that have a similar reputation to the SG - many are tech dives, but one that is a little more accessible is the Arabia. The Arabia appears to take lives most years and is very challenging (deep (115 F), cold (38 F), current, low to mediocre vis). Two dive shops that go to this site are extremely cautious about checking c-cards, going through your log books, and watching your other dives before agreeing to let you do this one. Two years ago, they must have spent 15 minutes reading my entire log book before they said that I could do it. I finally did it last summer, and my buddy and I followed every recommendation given to us. We had a redundant air supply and planned the dive and dove the plan meticulously. The dive went off beautifully, but we were prepared no matter what - and accepted the risk. It never occurred to me to think of the captain as a safety net. I can assure you that around here, if you have been cleared to do a dive, you are on your own. I don't know of any guided tours around here.
Are the SG dive charters cautious about who they allow to dive the Grove?