Powerful workhorses whose size belies their might, tugboats are the unsung heroes of our harbors, seas, and inland waterways. From helping large, awkward ships make their way in and out of busy ports to towing huge aircraft carriers great distances on the open ocean, these helpful little boats perform a wide variety of crucial roles. Packed with amazing photographs and informative text, Tugboats explores the fascinating world of these powerhouses, including: -- The intriguing evolution of the tug, from early steam-powered vessels with paddlewheels to the latest developments in tugboat technology-- The ins and outs of modern-day North American tugboat operations along the East, West, and Gulf Coasts, on the Great Lakes, and on major rivers.