This 600 page textbook must be a good candidate for being the authoritative reference on its subject...This book reveals all through a good, clear text amply illustrated...The authors and publisher are to be congratulated on an excellent production.--The Naval Review Well organized, clear and easy to read. The second edition has been enlarged with various items devoted to new electronic equipment now encountered by mariners, especially those concerned with navigational and radiocommunication equipment.--International Hydrographic Bulletin A major and standard text, now much enlarged and revised with sections on radar, communications, the gyro compass and all navigation systems encountered in merchant ships. Full and expert treatment of all aspects of electronic navigation and communication systems making it one of the leading references on its subjects.--Lloyds List