Chapter 5: System operation
162 MCDU operation
CHANNELS
This view lists the signal to noise ratio (C/No
in dB Hz) for each channel in the system. For
further information see To view the signal
strength of the channels on page 145.
NAV DATA
This view shows information about the navigational input received from
external systems:
• LATITUDE — in degrees, minutes, seconds.
• LONGITUDE — in degrees, minutes, seconds.
• ALTITUDE — in feet.
• SPEED — ground speed in knots.
• NAV SOURCE — the external source used for navigation which can be:
•IRS or
•AHRS+GPS
IRS shows the status of the IRS input. AHRS shows the status of the
AHRS input. GPS shows the status of the GPS input.
The NAV DATA view contains the following menus:
• DETAILED NAV
This view shows the following detailed information:
• HEADING — 0 to 360 degrees.
• PITCH — in degrees (U = up; D = down).
• ROLL — in degrees (L = left; R = right).
• DOPPLER VELOCITY, — the speed of the aircraft relative to the
satellite (knots).
• ANTENNA POS
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