This 48th edition of Marine Publishing Co.'s annual boatwatching guide includes everything ship fans need to know about the freighters, tankers, tugs, salties, passenger ships and other vessels sailing the Great Lakes and St. Lawrence Seaway. In Know Your Ships 2007 you’ll find complete data on more than 2,000 U.S., Canadian and International-flag cargo vessels, tugs, excursion boats and barges in regular Great Lakes & St. Lawrence Seaway service, including owner and port of registry, year built, length, beam, depth, cargo capacity and former names, type of engine plus builder information, horsepower and top speed for major Great Lakes and Seaway vessels. Nine pages of colorful stack markings of all Great Lakes & Seaway fleets, including stack markings of many of the saltwater fleets that regularly visit the Seaway system, flags of major nations in the marine trade and house flags of major Great Lakes and Seaway fleets, VHF marine radio scanner frequencies, phone numbers to help track vessel movements and meanings of boat whistles are also included.