This book was written by an experienced navigator who used navigation as a means of demonstrating the application of maths when he left the sea to take up teaching. Over many years, he developed the art of teaching navigation in an interesting way so that it could be understood by students of all ages.

Many of the author's adult students, including small boat owners and yachtsmen, expressed the need for an easily read and un-complicated book to help them to understand astro-navigation. Hence the reason for writing this book.

Several people who studied complimentary copies of the first edition of the book expressed the view that:

" No sea-going vessel or maths classroom should be without a copy "