737 Flight Crew Operations Manual
Flight Instruments, Displays -
PFD/ND – Displays
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10.11.16 D6-27370-866-EGP
The scale:
• indicates deviation
• in view when the localizer frequency is tuned
• expands when the localizer is engaged and deviation is slightly more
than ½ dot.
At low radio altitudes with autopilot engaged the scale turns amber and the pointer
flashes to indicate excessive localizer deviation.
Below 1,000 feet AGL, with LNAV engaged and LOC armed, the localizer scale
turns amber and the pointer flashes if the localizer is not captured.
Each pilot’s deviation alerting system self-tests upon becoming armed at 1500 feet
radio altitude. This self-test generates a two second LOC deviation alerting
display on each attitude indicator.
3 Marker Beacon symbol
Flashes (and audible) when over one of the marker beacons:
OM (cyan) – outer marker beacon (two dashes per second).
MM (amber) – middle marker beacon (alternate dot and dash).
IM (white) – inner marker beacon (only dots).
4 Glideslope Pointer and Deviation Scale
The pointer:
• indicates glideslope position
• in view when the glideslope signal is received
• fills in solid magenta when within 2 ½ dots from center.
• the pointer is not displayed when the track and the front course on the
mode control panel differ by more than 90 degrees (backcourse).
The scale:
• indicates deviation
• in view when the localizer frequency is tuned.
At low radio altitudes with autopilot engaged the scale turns amber and the pointer
flashes to indicate excessive glideslope deviation.
Each pilot’s deviation alerting system self-tests upon becoming armed at 1500 feet
radio altitude. This self-test generates a two second G/S deviation alerting display
on each attitude indicator.
5 Rising Runway (green with magenta stem)
Displayed when:
• localizer signal usable and pointer is in view.
• radio altitude is less than 2500 feet.
September 15, 2016
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