S201 AFM
7 - AIRPLANE AND SYSTEMS
DESCRIPTION
7.7 - INSTRUMENTS AND
AVIONICS
27/06/2019
SONAIR-S2-D-MAN-006
Page : 7-28
Rev. : A
•
Navigation
Navigation information is presented on the PFD through a combination of
horizontal situation indicator (HSI), a lateral deviation indicator (LDI) above the
heading display, vertical deviation indicator (VDI), and GPS navigation status
information. Optional bearing pointers, distance measuring equipment (DME)
display, and marker beacon annunciations may be displayed.
Navigation information can be cycled through up to four independent sources
by pressing the “CDI” touchscreen button at the bottom center of the display.
The selected navigation source is shown on the left side of the HIS or LDI. CDI
source selection can be synchronized across multiple Txi PFDs if enabled by the
pilot.
Automation of CDI source selection and course selection is provided in the
following situations:
-
Localizer CDI Switch Prompting
–
the CDI button on the PFD will flash when
established on the final approach course of a LOC-based approach, if the
CDI source is GPS. This serves as a reminder to change the CDI source to
LOC.
-
Localizer Course Auto-Slewing
–
the appropriate LOC course will be
automatically preset when a LOC-based approach is loaded in the
navigator and the CDI source is not already selected to LOC.
-
Missed Approach Point Auto-Switching from VLOC to GPS
–
When the
missed approach segment of an approach is begun (navigator
unsuspended after the missed approach point), the CDI source will
automatically switch from VOR/LOC back to GPS.
NOTE
Navigation functionalities are to be used for situational
awareness under VFR only