Unit settings – Garmin GNC 300XL TSO User Manual
Page 114
104
SECTION
7
UNIT SETTINGS
Magnetic Variation
Arrival Alarm
The GNC 300XL has three magnetic variation options: true, auto, or user-defined.
To set the magnetic variation:
1. Press and hold
M
, and use
O
to display the ‘Mag Var/Arvl Alarm’ page.
2. Press
C
twice and use
K
to select ‘auto mag’, ‘true hdg’ or ‘user mag’.
3. If user is selected, use
O
to highlight the magnetic variation value, and use
K
and
O
to enter the value and ‘E’ or ‘W’. Press
C
to finish.
If ‘auto’ mag var is selected, all track, course and heading information will be cor-
rected to the magnetic variation computed by the GPS receiver. The ‘true’ setting will
reference all information to true north, and the ‘user’ setting will correct information to
an entered value.
The GNC 300XL’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
waypoint 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 run-
way length and surface type 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 type.
The runway length and surface type settings allow
pilots of large, high-performance aircraft to direct
the
T key function to ignore those airports at
which if would be difficult, if not impossible, to
land their aircraft.
Setting the arrival alarm to 10 nautical miles.
300xl manual 1/25/99 2:36 PM Page 104