I'm not a boat owner, although everyone else in my family is. We grew up on Lake Superior, around Sault Ste Marie, Michigan. I used to dive frequently between Marquette and Whitefish Point. So my comments fall into the "for what it's worth" category...pcarlson1911:Small cuddy, walk around, open in the back,...
Weather conditions can change dramatically and rapidly on Lake Superior. Aside from waves, it can get amazingly cold under the right conditions. I used to dive with a group of guys who owned three older boats, all between 25' and 30' trailerables, all with cabins amidships with a second pilot station on top of the cabin, and canvas/clear plastic shrouds that could be installed over the open aft deck and stern...with seriously burly heaters!
More than once we went out in the morning under clear or partly cloudy skies, and raced back in under heavy grey scud while freezing our tails off. I was always grateful for the enclosed back ends and the heaters...
In terms of seas, we were racing in to Whitefish Point on one occasion and a guy got his arm broken simply from the jolt of the bow dropping off the crest of a good size wave in a mid-size boat.
If you're gonna drop some major ching on a boat for Lake Superior diving, I suggest you take a season and get out on some of the various charters up there before buying. If you spend an entire season going out on some of the various charters, you'll have a much better developed sense of the weather conditions you'll deal with and features you may want on a boat of your own.
Better to do the research up front and be a more informed buyer, than to buy a boat and afterwards determine that it won't let you go out for more than 5-6 days in any given month due to seas and weather.
Then again...perhaps I simply got weird weather and seas every time I went out whereas you'll always have flat seas and sunshine! Never can tell...
Regards,
Doc