Dean McConnachie has logged more than 800 dives since his American Canadian Underwater Certification in 1984. An avid underwater videographer, he has filmed shipwreck sites on the Great Lakes and along the eastern Atlantic Ocean. He lives on the water in Port Credit, Ontario.Christine Marks recently completed her ACUC Basic Diver course. Her previous book was Interstate 75 and the 401. She lives in Hamilton, Ontario.