I A P 2 0 2 3 . 0 0 1 - A F M / I R I S T E X A N I I P A G E | 147
FOR SIMULATION USE ONLY ā NOT A TRAINING AID
The CDI head is oriented on the compass rose to indicate either the desired course
(when the navigation source is VOR) or desired track (when the navigation source is
FMS).
The deviation bar indicates the lateral deviation from the desired course or track by
translating along the scale perpendicular to the CDI arrow.
The TO or FROM arrow (displayed in white), indicates whether the selected course
takes the aircraft to or from the navigation facility. The To/From arrow always
points towards the outside of the compass rose, and is displayed either at the inner
end of the CDI head (when the indication is TO) or at the inner end of the CDI tail
(when the indication is FROM).
The other CDI annunciators enroute (ENR), terminal (TERM), and approach (APR)
apply only in FMS operation and are displayed to indicate the current FMS phase of
flight.
The offset (OFS) annunciator is used to indicate when the FMS is navigating an
offset path. The selected course for the CDI in VOR operation is displayed at the
lower left key and is set using the UFCP.
When the lower left key is pressed, the UFCP page is changed to display the NAV
level 1 page. Entry of a new course can be accomplished by entering a new value
with the number keys and then pressing the ENT key.
GROUND SPEED
The ground speed indicator indicates the current aircraft speed with respect to
ground. In the event of receiving invalid data, the ground speed digital readout is
substituted by three amber asterisks and, in the event of a failure, the label "GS"
becomes red and the digits are replaced with a single large red "X".
TRUE AIRSPEED
The true airspeed indicator displays the true speed of the aircraft through the air (in
knots) which is calibrated airspeed corrected for pressure altitude and
temperature.
WIND SPEED AND DIRECTION
The wind speed and direction indicator consists of a rotating arrow that shows wind
direction and a digital readout that shows wind speed. The wind speed readout
displays a value between 2 and 99 knots, with values greater than 99 knots
displayed as 99+.
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