In this clear, well-illustrated manual to the Global Positioning System, mariners will find simple solutions to navigational problems. Monahan is a Canadian Coast Guard officer with over 20 years’ experience cruising the Inside Passage. Douglass has logged over 150,000 miles cruising from 60°N to 56°S. Includes 150 detailed diagrams, which graphically illustrate the many ways you can use GPS to solve classic piloting and navigation problems. This book introduces the novice to the basics of instant navigation and carries him to advanced techniques of error reduction, electronic charting, and navigation software.