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Fathom Five has over twenty charted wrecks. The most popular are the Sweepstakes, a schooner in 6 metres that can be snorkelled; the City of Grand Rapids, a steamer in 3 metres beside the Sweepstakes; the Arabia, a barque at 33 metres for advanced divers; and the Forest City, a steamer at 15 metres. The Sweepstakes is the most photographed wreck in Canada, its hull nearly complete and perfectly visible through the clear water. Most dive operators offer multi-wreck itineraries that progress from shallow to deep depending on group certification levels.

A drysuit is strongly recommended. Georgian Bay water temperature ranges from about 4 degrees near the bottom to 18 degrees at the surface during peak summer. Even in August the deeper wrecks below 15 metres are in single-digit temperatures. A 7-millimetre wetsuit is workable for the shallow wrecks in July and August, but most Canadian divers wear drysuits year-round. The Tobermory dive shops rent drysuits and thermal undergarments. If you are not drysuit certified, several operators offer courses that can be combined with wreck diving.

Yes, all divers must purchase a Parks Canada dive permit before entering the water. Permits can be obtained at the park visitor centre in Tobermory or online in advance. The current fee covers the entire season. Divers must also follow park regulations including no artifact removal, no penetration of certain fragile wrecks, and mandatory dive flag display. Some wrecks have special restrictions, particularly the deeper ones that require registration. Dive operators in Tobermory include the park permit in their packages.