Magellan 210 Manual De Referência

To maintain the accuracy of the pressure altimeter you should calibrate it every 2 - 3 hours
using known elevation markers.  

1.

Press MENU.

2.

Use the Arrow joystick to highlight 

Weather.

3.

Press ENTER.

4.

Press MENU.

5.

Use the Arrow joystick to highlight 

Set Altimeter.

6.

Press ENTER.

7.

Press ENTER.

8.

Use the Arrow joystick to input the known elevation setting.

9.

Press ENTER.

10. Press ESC to return to the Weather screen.