Space and time on earth are regulated by the prime meridian, 0°, which is, by convention, based at the Royal Observatory, Greenwich. But the meridian’s location in southeast London is not a simple leg
In this guide, Schlereth draws on his experience as a sailor to explain how to navigate any stretch of sea using only a hand-held sextant, a watch, a plotting sheet, and a copy of the Nautical Almanac
There is deep mystery and profound satisfaction in finding your position on earth by reference to the sun, moon, and stars--not to mention profound relief when the GPS receiver stops working in mid-pa