Replace the current Land Warrior nav box with SEER’s NaviSeer and you’ll have pinpoint SA in GPS-denied environments. While Land Warrior’s nav box has dead reckoning, it only knows what direction you were heading when GPS cut out, how fast you were going and if you stop. Basically, it’s useless indoors.
On the other hand, NaviSeer is a much more sophisticated unit that uses hardware and proprietary software to track your movements relative to a last known point. It’s a self contained unit that houses three gyros, three accelerometers (one at each axis), a magnetometer and a baro altimeter and a GPS module. When GPS is available, the DR functions are automatically calibrated continuously. When GPS is unavailable, DR takes over.
