Unit settings – Garmin GPS 155XL TSO User Manual
Page 109
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The ‘auto mag’ setting will automatically calculate
the magnetic variation based upon your current
position.
When the ‘Auto’ CDI setting is selected, the
GPS 155XL will automatically change the CDI
scale when you are within 30 nm of a departure
or arrival airport. The CDI setting will be reset to
‘Auto’ during approach operations, to provide a
smooth CDI transition from 5.0 nm to 0.3 nm
scales.
SECTION
6
UNIT SETTINGS
Map Page Setup
CDI Settings
To enable/disable airspace boundaries on the map:
1. Press and hold
M
, then rotate
O
to select the ‘MAP Setup’ page.
2. Press
C
and rotate
O
to highlight ‘class B/cta’, ‘class C/tma’, ‘moa’,
‘restricted’ or ‘other sua’.
3. Rotate
K
to select the maximum map scale for the designated airspace type, or select
‘off’ to never display.
The next page under the settings submenu is the CDI settings page, which
allows you to define the scale of the GPS 155XL’s course deviation indicator.
To change the CDI scale:
1. Press and hold
M
, and rotate
O
to select the ‘CDI Settings’ page.
2. Press
C
and rotate
K
to select ‘Auto’, ‘+- 5.0 nm’, ‘
+
- 1.0 nm’ or ‘
+
- 0.3 nm’.
3. Rotate
O
to highlight ‘ok?’ and press
E
to approve.
(Note: The selected CDI scale will not take effect until approved.)
The scale values represent full scale deflection of the CDI to either side. The
default setting is ‘Auto’. The ‘Auto’ setting will start the CDI scale at 5 nm (en route),
and gradually ramp down the scale to the 1 nm range once you are within 30 nm of
a departure or arrival airport (terminal area). For auto CDI scaling to occur, you must
have an active direct-to or route with an airport as your final destination waypoint, or
be within 30 nm of a departure airport. Note that the Receiver Autonomous
Integrity Monitoring (RAIM) protection limits listed below follow the selected CDI
scale, changing automatically with the ‘Auto’ setting:
CDI Scale
RAIM Protection
+/-5.0 nm or Auto (en route)
2.0 nm
+/- 1.0 nm or Auto (terminal)
1.0 nm
+/- 0.3 nm
0.3 nm
155xlb manual 1/12/99 4:06 PM Page 99