The purpose of this book is to provide a form of self teaching of rules of the road and self examination on the navigation lights and related situations that could be seen at sea or asked at the oral examinations for the certificate of competency. This book is divided into two main sections. The first section contains simple explanations of the rules, while the second section covers more than fifty situations, exam questions and model answers. The rules, explanations and model answers are the views of the author and not necessarily the view of courts and regulators. Interactive navigation light identification software is available after the explanation of the rules. This contains enough navigation light examples required for the certificate of competency examinations. All questions are asked randomly. You will need to identify the light and then check the answer at each page. You need to master these simple tests before you go for your oral examination. The book has colour images so use this with kindle application for color devices like iphone, ipad, android or PC. Download a more detailed sample at