At a recent search-and-rescue boot camp I attended, it was clear during unscientific tests I performed that a standalone, dedicated Global Positioning System device was more accurate navigating to waypoints than a smartphone with GPS chip -- but it was only by a few feet. A dedicated GPS device that a buddy operated was spot-on when predeployed marker UTM co-ordinates were plugged in to both devices -- the Android smartphone and GPS -- and both were used to navigate to a flag marker. The smartphone was off by up to 15 feet. But does it matter?
Source: http://ectnews.com.feedsportal.com/c/34520/f/632000/s/24de13e1/l/0L0Stechnewsworld0N0Crsstory0C764780Bhtml/story01.htm
BHARTI AIRTEL BT GROUP
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