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The next Settings page contains the magnetic variation options. The GPS 150
offers three magnetic variation settings. True, automatic, or user defined magnetic
corrections will be applied to all track, course and heading information.
To set the magnetic variation:
1. Press
S
and rotate
O
until the Magnetic Variation page is displayed.
2. Press
C
and rotate
K
to select ‘auto mag’, ‘true hdg’ or ‘user mag’.
3. If ‘user mag’ is selected, use
O
to highlight the magnetic variation value field and
K
and
O
to enter the value, and E or W. Press
E
to accept.
4. Press
C
to complete.
If ‘auto mag’ is selected, all heading information will be corrected with the automatic
magnetic variation computed by the GPS 150, depending on your position. If you
select ‘true hdg’, all heading information will be referenced to true north. If ‘user mag’
is selected, all heading information will be corrected by the value you enter.
When using the nearest function to locate the nine nearest airports, it will display
the nine closest airports according to the parameters you may choose. A surface type
and minimum runway distance may be selected to prevent airports with small run-
ways, or runways that are not of appropriate surface from being displayed.
To set the minimum runway length and runway surface:
1. Press
S
and rotate
O
until the Nearest Airport Search page is displayed.
2. Press
C
and use
K
and
O
to enter the minimum runway length required for your
aircraft to land (up to 9999 units). Press
E
.
3. Rotate
K
to display the surface selection you desire. Choices include:
• any surface • hard only surface
• soft/hard surface • water only surface
4. Rotate
O
to select ‘ok?’ and press
E
to confirm. Press
C
to complete.
56
REFERENCE
Magnetic Variation &
Runway Settings
Section
5
User magnetic variation set to E011º.
Magnetic variation with auto mag selected.
Nearest Airport Search page
150man rev E 7/24/98 3:10 PM Page 56