Part of Oxford University Press’s Very Short Introductions series, Navigation discusses the tools and methods used by mariners and navigators to find their way across the seas, beginning with various cultures’ ancient navigational techniques, moving through tools like cross-staffs, backstaffs and octants, dealing with the matter of longitude (on which Bennett has some opinions regarding the popular narrative), before wrapping up, too briefly, with modern techologies like radio beacons, inertial navigation and GPS.
There are some illustrations that are a great help in understanding concepts and tools whose use is not immediately obvious, but, as the subtitle suggests, this is not a book that goes into much depth. At only 144 pages—20 percent of which is taken up by front matter, glossary and index—it can only give the barest of introductions to the subject. That can be maddening for the reader, particularly when its coverage is so uneven: there’s a fair bit on the tools and techniques used during the age of sail, but only a paragraph on LORAN and Loran-C, for example. Another frustration is Bennett’s extremely discursive style, as though he were giving a posh invited lecture; I kept feeling that more could have been included had his prose been tightened up.
All the same, there’s value in a book that styles itself, modestly, as an introduction. An introduction is where you begin. It’s the first step, not the finish line. It sets out the parameters of the field and gives you just enough to know what’s out there. For someone like me, it tells me where the gaps are in my knowledge. To paraphrase someone, it lets you know what you do not know. It tells you where to go next: the most useful part of the book may well be its “Further Reading” section; you just need the preceding 116 pages of text to know how to use it.
And for all my concerns about brevity and prose, it’s a good deal more accessible, and easier to read, than the equivalent Wikipedia page—and it went through an editorial process, too. And while it’s not free, it’s very modestly priced. So I have no regrets about buying it.