Using the Altitude Differential Value While Mountain Climbing or Hiking
After you specify the altitude differential start point while mountain climbing or hiking, you can easily measure the change in the altitude between that point and other points along the way.
To use the altitude differential value
- In the Altimeter Mode, check to make sure that an altitude reading is on the display. If an altitude reading is not displayed, press C to take one. See “To take altitude readings” (page E-39) for details.
- Use the contour lines on your map to determine the difference in altitude between your current location and your destination.
- In the Altimeter Mode, press A to specify your current location as the altitude differential start point. The watch will take an altitude reading and register the result as the altitude differential value start point. The altitude differential value will be reset to zero at this time.
- While comparing the altitude difference you determined on the map and the watch’s altitude differential value, advance towards your destination. If the map shows that the difference in altitude between your location and your destination is +80 meters for example, you know you will be nearing your destination when the displayed altitude differential value shows +80 meters.
