Silva NOMAD Operator's Manual page 5

2. Press ENT when fi nished to exit back to Compass Mode.
The compass is now calibrated.
If no buttons are pressed in calibration setting for 2 min., NOMAD™ will
automatically escape back to Compass Mode, without being calibrated.
2.1-2 Magnetic Declination Setting
When possible, use magnetic declination adjustment when using a map with
the NOMAD™. A magnetic compass senses Magnetic North and provides a
bearing based upon Magnetic North. However, the majority of maps are drawn to
True North, which provides bearings based upon True North. To make the compass
"speak the same language" as the map, you must adjust the compass for
magnetic declination.
Determine magnetic declination from a map, or from the Magnetic
Declination Chart. (Fig 6)
Figure 6
7