Great Lakes are famous for shipwreck diving.
Some wrecks may be located within recreational depths and diving wet during the Summer is possible but for any sort of serious wreck diving in the Great Lakes, you will need to dive dry. Basic open water cert is first along with getting some actual experience diving. If you still like what you are experiencing seek an advanced open water cert, basic nitrox and if the goal is diving in the Great Lakes, it's time for a dry suit and training how to use it correctly. Dive a lot,gaining more experience and then seek advanced nitrox and deco procedures training.
The basic cert, advanced open water and dry suit training can be had through just about any dive shop located in a place where it gets cold. Advanced nitrox and deco procedures training, will need to happen with a shop that does technical dive training. If the end goal is shipwreck diving in the Great Lakes, I would start with a shop that offers both rec & tech training with you getting to know the shop & instructors and they you.
If your serious about diving in the Great Lakes I would only train with a shop that does their open water training in that environment. You can always go warm and clear if you've been trained to dive in murky & cold, the other way does not work well.
Bad idea to go on a vacation to Florida or Mexico, get certified there to come back and dive in the Great Lakes.
Be fore warned shipwreck diving can be addictive and is a very easy hobby to pour LOT of $$$ and time into.
Last edited by Mpellet; 09-23-2016 at 10:58 AM.