Penetanguishene & Southern Georgian Bay

The diving runs from the boat. The Georgian Explorer, a licensed commercial charter boat, leaves at 8:00 from Cedar Point Dock, with divers on the dock by 7:30 to load gear, and some trips start instead from the Penetanguishene town dock. A day gives up to three dives on two tanks. Visiting dive shops such as The Dive Academy from Oakville and Scuba 2000 charter the boat, while Neptune's Locker, a dive shop on Champlain Road in Tiny, specializes in dives on southern Georgian Bay.

Christian Island and the uninhabited Hope Island beside it carry the main wrecks, most of them a century old or more and well preserved by the cold fresh water. The Michigan, the Mapledawn and the Marquette make up the usual three-wreck day. The charter also offers the Lottie Wolf and the Wawinet, and in really bad weather the wrecks up the Musquash River, where the Chippewa lies sheltered at the river mouth in water that silts easily. For a more open-water dive, boats run to the remains of the Thomas Cranage off Hope Island, and the LuckPort is another wreck in the area.

The area suits new divers, since the main wrecks are rated for every certified diver and summer visibility reaches about six metres in water that warms to 21 °C in August. The deepest of the main wrecks, the Marquette, reaches 16 m (54 ft). The Chippewa, the bad-weather fallback up the Musquash River, is the exception for visibility: about 3 m (10 ft), with silt that is easily stirred.