Garmin GTN 625 Pilot's Manual page 524

Foreword
Getting
Started
Audio &
Xpdr Ctrl
Com/Nav
15.7.2
There are three variation (heading) options: Magnetic, True, and User. If
FPL
"Magnetic" is selected, all track, course and heading information is corrected
Direct-To
to the magnetic variation computed by the GPS receiver. The "True" setting
references all information to true north. The "User" selection allows the pilot
Proc
to enter values between 0º and 179º E or W. When configured by the installer,
there may also be a fourth option: External. If "External" is selected, the GTN
Wpt Info
Nav Angle will be synchronized with the on-side MFD.
NOTE: When changing the Nav angle, the DTK on the Flight Plan page
Map
for an approach does not change until that approach is reloaded.
Traffic
Terrain
Weather
Nearest
Services/
Music
Utilities
System
Messages
Symbols
Appendix
Index
15-34
Figure 15-42 System Units Selection Windows
3. After making the desired selections, touch the Back key to
return to the Setup page.
Setting a User-Configured (Manual) Nav Angle
1. While viewing the System page, touch the Units key.
2. Touch the Nav Angle key and then the User key.
Figure 15-43 Nav Angle Selections
3. After User is selected, touch the Magnetic Variation key to
set the value.
GTN 625/635/650 Pilot's Guide
Touch to Select User
(manual) Mag Var
190-01004-03 Rev. P