This is an interesting and entertaining book for those who wish to be less dependent on GPS and electronics . Through a variety of illustrated projects, you can learn how to make traditional navigational instruments and explore some of unusual and long forgotten techniques. Among other things you can detect sea currents using a kettle. Find latitude and longitude by the Pole Star. Take Sun Sights with a cassette holder. Navigaye with the aid of poetry. Self-steer with a tiller sail. Search for buried treasure etc. etc. A great little book. 147 pages. PB.