After searching for many years on the Internet, of incomplete information on how to use a compass (this book was 1 of the searches), apparently there are 5 ways to use a compass: The functions of a compass are;
1. to maintain a straight line of travel, such as following a bearing;
2. to orient a map, which is just lining up the map with the land to make landmark identification easier;
3. to tell direction, such as taking a bearing from a map;
4. to locate your position by taking several bearings and plotting them on a map;
5. to plan a route, by using your compass as a protractor.
This book does not even tell you that. I wished it would have, because after reading other books (that did not tell you either), it was very confusing (which function of a compass are they trying to teach?).
THIS book only tells you how to take a bearing, then only how to take a bearing (1) with a map, & how to use a compass as a protractor.
But both those methods are only cursory (ie: 2 sentences), & are too vague.
Another downfall of this book (& others), is that it does not have a labelled picture of a compass with the parts of it labelled, also.
The reason this is important as people/books use different terms for the same compass part (ie: orienteering arrow = fixed arrow; or Line of Sight = Bearing Direction Indicator, etc).
This is very confusing & a mistake many books/ webpages make (not having a labelled picture of a compass with the parts named the way they are using).
So this is just a run of the mill book, that you could get the same information for free on the Internet.