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Long Range Hunting & Shooting
Barometric Pressure? Altitude?
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<blockquote data-quote="Bravo 4" data-source="post: 1142414" data-attributes="member: 8873"><p>40, do as Michael says and just use station pressure and leave the altitude at zero. </p><p>These devices (unlike GPS) use the pressure to determine altitude. At the mountain warfare school we used a device the worked on pressure and every time we made it to a point on the map that was surveyed to a certain altitude we had to recalibrate it for that altitude. Pain in the butt! Plus the pressure can change throughout the day and when fronts move in and out, this will change the altitude on such devices where you are at even though you never moved. So simplify it and use station pressure.</p><p></p><p>Also the idea of using a Topo phone app is a good one. I use one and now hardly ever use a GPS.</p></blockquote><p></p>
[QUOTE="Bravo 4, post: 1142414, member: 8873"] 40, do as Michael says and just use station pressure and leave the altitude at zero. These devices (unlike GPS) use the pressure to determine altitude. At the mountain warfare school we used a device the worked on pressure and every time we made it to a point on the map that was surveyed to a certain altitude we had to recalibrate it for that altitude. Pain in the butt! Plus the pressure can change throughout the day and when fronts move in and out, this will change the altitude on such devices where you are at even though you never moved. So simplify it and use station pressure. Also the idea of using a Topo phone app is a good one. I use one and now hardly ever use a GPS. [/QUOTE]
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