Enjoy some of the world's best shipwreck diving and some of Lake Superior's most picturesque wilderness at Isle Royale National Park.  Lake Superior's cold clear waters have done a superb job of preserving Isle Royale's ten major shipwrecks. Your Captain Ken Merryman and his classic live-aboard dive boat Heyboy have been chartering at Isle Royale since 1975. We are on hiatus now circum-navigating the Great Lakes.  If you would like to see what we have been doing to document our Great Lakes shipwrecks in 3D take a look at  www.3dShipwrecks.org . See the Season Calendar for details.