This book is a complete guide to all forms of communication at sea. It examines the international marine use of cell phones, satellites, amateur radio, and email, cutting through the jargon and sales hype to enable readers to make the right choice for their needs. Comprehensive appendices on radio procedure, tables of radio frequencies and weather broadcast times provide invaluable reference information not available from any other single source. This book is an essential on-board reference for cruising sailors worldwide.