How to calibrate a Garmin eTrex Legend HCx?

Ok so i was geocaching with this and i noticed something a little funny, each time i arrived at the cache (the gps) always said that the "cache" was 150 feet away. And after finding 2 more caches it keep on saying it was 150 feet away. So does anyone know how to calibrate this model? I am having trouble... show more Ok so i was geocaching with this and i noticed something a little funny, each time i arrived at the cache (the gps) always said that the "cache" was 150 feet away. And after finding 2 more caches it keep on saying it was 150 feet away. So does anyone know how to calibrate this model? I am having trouble finding in on google. Thanks.
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