To reset the altitude differential value to zero

Altitude differential

In the Altimeter Mode, press E.

This will start altitude measurement. The

 

 

altitude differential value will show 0 after

 

measurement is complete.

 

You must perform altitude differential

 

measurement whenever you select format

 

number 3 or 4 as the Altimeter Mode display

 

format (page E-68).

Using Altitude Differential Measurement While Mountain Climbing or Hiking

After you zero reset the reference altitude value at a particular location while mountain climbing or hiking, you easily can measure the change in the altitude between that point and another point.

E-80