Don't leave port without it Annual 144-page bible of boatwatching on the Great Lakes and St. Lawrence Seaway offers vital satistics on nearly 2000 U.S., Canadian, and International-flag vessels that pass our shores, including owner and port of registry, vital statistics and former names. Horsepower and engine data for major vessels included. Also: 10 pages of colorful stack markings and flags of Great Lakes/Seaway fleets, information on the Soo Locks, Welland Canal and St. Lawrence Seaway, a guide to Great lakes marine museums and dozens of superb color photographs of Great Lakes vessels.