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The scale setting for the
CDI is shown on the status
bar. Use the
AA
key to
change the scale.
The data fields may be
configured to display any of
fourteen different values.
To change a data field,
select the HSI options page
by pressing
øø
.
23
Notice that as you get off course, the compass card, desired track
pointer and D-bar move to give you graphic guidance to get back on
course. The compass card rotates to indicate your current ground
track at the top of the page. (Don’t confuse this with aircraft
heading because it may be different!) The desired track pointer stays
fixed on the desired track (DTK) to your destination waypoint— the
original course line from point of origin to destination waypoint. The
D-bar and CDI (course deviation indicator) show just how far left or
right of the desired course you have drifted.
The scale setting for the CDI is shown at the bottom right of the
page. The scale setting represents the distance from the center of the
CDI to full left or right limits. The default CDI setting is 1.25 nm, but
can also be set for 0.25 or 5.0 nm ranges.
To change the CDI scale:
1. Press the
A
key in either direction (up to increase, down to
decrease the scale).
The HSI page data fields may also be configured to display any of
fourteen different navigation values. These navigation values are
defined in Appendix F. To demonstrate how data fields are changed,
let’s change the ETE (estimated time en route) data field so it displays
DTK (desired track).
To change a data field:
1. Press the
O
key to display the HSI page options.
2. Highlight the ‘Change Data Fields?’ option and press
T
. The field
highlight will now appear in the top-left data field (starting with the
WPT field).
3. Use the
R
keypad to move the field highlight to the ETE field and
press
T
. A list of available data items will appear (see illustration
at right).
4. Highlight the ‘DTK’ option and press
T
.
5. Press
Q
to finish.
TAKEOFF TOUR
HSI PAGE (cont.)
Off course to the Left
Off course to the Right
gps 195 manual C 7/1/99 4:48 PM Page 23