Amazon.com description: Product Description: Stephen Fishman has kept the techno-babble to a minimum while retaining all that is important concerning Electronics Aboard. How a device works may not be necessary to your understanding of its use, but some things are simply interesting to learn. Stephen won't bore you with the details of how a microprocessor works or the theories of resistivity, but taking a moment to learn about sine waves and radio frequencies will be worth your time. Unlike many other electronics books, you will not be intimidated by the information you read in this book. It is written in a concise, easy to understand style.If you are the equivalent of a marine propeller head, run do not walk to the shelf where you found this book and put it back. You won't like it. But if you want plain-talk about truly useful equipment that can enrich your boating experience, you have definitely picked the right book.