Garmin GNC 250 - Manual (Page 83)

If ‘auto’ mag var is selected, all track, course and heading information will be corrected
with the variation computed by the GPS. The ‘true’ setting will reference all information to
true north, and the ‘user’ setting will correct information to an entered value.
The GNC 250’s arrival alarm can be set to notify the pilot with a message when you
have reached a user defined distance to a final destination waypoint (the direct-to way-
point or the last waypoint in a route). Once you have reached the set distance (up to 99.9
units), an ‘Arrival at _____’ message will be displayed.
To set the arrival alarm distance:
1. Press and hold
M
and use
O
to display the ‘Mag Var/Arvl Alarm’ page.
2. Press
C
twice and use
O
to select the arrival distance field.
3. Use K and O to enter the desired distance. Press C to finish.
The nearest airport search settings allow you to define the runway length and
surface type used in determining the nine nearest airports displayed. A minimum runway
distance and surface may be entered to prevent airports with small runways, or runways
that are not of appropriate surface, from being displayed. The default settings are ‘0 ft/mt’
for runway length and ‘any’ for runway surface.
To set the minimum runway length and runway surface:
1. Press and hold M and use O to display the ‘Nearest apt search’ page.
2. Press
C
twice and use
K
and
O
to enter the minimum runway length upon which your
aircraft can land (up to 9999 units). Press
E
to accept the distance.
3. Rotate
K
to display the surface selection you desire. Choices include:
• any surface • hard only surface
• soft/hard surface • water only surface
4. Use O to select ‘ok?’ and press E to confirm and C to complete.
73
APPENDIX D
Messages &
Abbreviations
Setting the arrival alarm.
Runway length and surface type settings.
SECTION
6
UNIT SETTINGS
Arrival Alarm
Nearest Airport Search
250 real 7/14/98 9:33 AM Page 73