Vector combines an altimeter, vertical speed indicator, bar- ometer, compass and precision timepiece in one compact wristwatch-sized case. It allows altitude measurement in feet or meters, up to a maximum of 27,000 ft., accurate to plus or minus 10 ft. It also provides instantaneous vertical ascent and descent rates in either ft. per second or meters per second. The backlit display is easy to see in all lighting conditions. The barometer displays current barometric pressure & trends for accuracy, and a deviation adjustment to correct for differences between true and magnetic north. Reliable and accurate, this new instrument provides time, day and date, as well as 3 daily alarms, a stopwatch and countdown timer. The unit is also waterproof to 100 ft.