Garmin 60csx Observations in GPS technology and devices Posted March 31, 2006 Boy was I disappointed! My older 76Cs brought me to within 6 feet doing the same thing. The new, just out of the box 76csx brought me 58 to 75 feet away! ( Could not really tell because the unit kept pointing me to walk out into the middle of a busy street. Then I went and sat on the BM and calibrated the altimeter. This was a bit better, only about 5-8 feet off. While I put the GPSr on the BM surface it was still saying that the location for the BM was 60 feet away. Are you sure you are using the same map datum setting on both units?