This may be a stupid question, but I'm not an experienced diver, so I thought some of you could help me out. We will be going to CTI in December. Neither of us are certified divers, but would like to take the resort course and do the introductory dive. How deep does this introductory dive go? I would like to buy a new camera before our trip, and I was thinking of getting a waterproof one (not just for the one dive, obviously...but for the falls, the beach, whatever). Thanks for your help beach experts!