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The other primary navigation screens are the HSI and Highway pages, with the
HSI Page appearing first in the sequence of main pages.
To view the HSI Page, press PAGE.
The HSI Page provides graphic steering guidance to your destination waypoint.
The page features a graphic HSI (horizontal situation indicator), including a rotating
‘compass card’ that shows your course over ground (track) while you’re moving, a
course pointer and CDI (course deviation indicator) which indicate the desired
course to your destination. The compass card, pointer arrow and CDI work inde-
pendently to show—at a glance—the direction you’re travelling, the desired course
and whether or not you are off course.
At the center of the CDI is a ‘D-bar’, or course deviation bar. If you move off
course, the D-bar will indicate how far off course you are and in what direction. The
scale for the CDI is indicated at the bottom of the page. The scale represents the
distance from the center of the CDI to full left or right limits.
As you approach the waypoint, a TO/FROM indicator will signal waypoint cross-
ing. The current speed, distance to the next waypoint, time to the next waypoint and
vertical speed to target are all displayed to the right of the graphic HSI. To see how all
this works on our simulated trip, let’s head off course and watch the displays change.
To move off course/on course in simulator mode, use the LEFT/RIGHT
keys on the rocker keypad.
From the HSI Page, you can
increase/decrease the
simulated speed using the
UP/DOWN keys on the
rocker keypad.
To move off course in simula-
tor mode, use the LEFT/
RIGHT rocker keypad keys.
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SIMULATOR TOUR
HSI Page
Pointer
(Desired Course)
Compass Card
(Track)
D-bar and
CDI Scale
Bug Indicator
TO/FROM Indicator
GPS III Pilot B2 4/1/99 2:02 PM Page 22