An Azimuth Stern Drive (ASD) tug boat is a high-performance vessel that is responsive, quick to maneuver, and extremely powerful. This workbook is designed to facilitate learning, through both intellectual and hands-on presentations. It teaches a clear understanding of ASD tug maneuvering principles and assists the reader in acquiring the intuitive feel for operating the tug. Text and illustrations provide exercises recommended to build the hands-on knowledge. The book covers the basic elements of maneuvering an ASD tug, through steering, speed, turning, stopping, hovering, and lateral movement. Each chapter provides questions to test and strengthen the skills. AUTHOR: Captain Jeffery Slesinger, a licensed master since 1977, has been operating Z-drive and conventionally propelled tugas for over 20 years in harbor, coastal, and offshore operations. He lives in Seattle, Washington.