How not to rely on luck.(Digest)

An odd slogan, but one that takes an altogether new meaning when applied to navigation and the location of one's partner. The slogan belongs to the Finnish company Suunto, which develops and markets high-precision dive computers, field compasses, specialty precision instruments, marine compasses and wrist-top computers--which the company labels the "next generation military watch". The M9 is a multi-purpose instrument that measures mission critical data and incorporates an altimeter, barometer, compass, inclinometer, chronometer, stopwatch, heart rate monitor, thermometer (for ambient temperature) and a GPS. The M9 features navigation support, guidance to waypoints, find home …