An invaluable aid for students of the art and science of navigation, whether they be novices setting out with their very first boat or mariners with long experience at sea. It is the first book on this difficult subject to provide extensive illustrations and charts, over 200 in all, in order to help the reader fully grasp the principles of navigation and fully understand the consequences of not knowing these principles well. With this visual support, the text clearly presents all the information required to power a launch through inland waters or sail a yacht along the ocean coast.