When you measure altitude using a reference altitude specified by you After you specify a reference altitude, the watch uses that value to convert the current measured barometric pressure value to altitude.

•When mountain climbing, you can set the

reference value in accordance with a marker

B

along the way or altitude information from a

 

map. After that, the altitude readings

A

produced by the watch will be more accurate

400

than they would without a reference altitude.

 

Displaying Your Current Altitude

You can use the procedure described in this section to display your current altitude. If you leave the watch in the Altimeter Mode, it will update the displayed altitude value regularly, and indicate reading-to-reading changes in the altitude graph at the top of the display (page E-65).

E-63