Now, don't get me wrong. This book has proven to be invaluable in avoiding huge ships. In fact, after reading this, my collisions with huge ships dropped to only 3 a week.However, SNAME regards only ships in the 800-1200 foot range as "huge". This book is only applicable to that range. To learn about the other ship sizes, you have to buy the other 11 books.So, despite this extremely helpful book, I still got hit by 7 separate supertankers on my way to work. 2 stars.