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Ground Roll Reference: The Ground Roll Reference symbol is unique
information not normally available on conventional head-down displays. It
is a circle with straight “wings” on either side. The Ground Roll Reference
shows the actual ground track of the aircraft.
Ground Localizer Deviation Scale and Pointer: If enabled, the Ground
Localizer Deviation Scale and Pointer is displayed below the Ground
Reference symbol. The pointer is centered when the aircraft is tracking the
localizer. Pointer movement away from center shows the aircraft’s lateral
deviation from the runway centerline.
HGS-Derived Ground Guidance Cue: The HGS Ground Guidance Cue
gives lateral guidance to track the runway center line during guided rollout.
HGS® Pilot Guide for the Bombardier CRJ 700 Model 4200
9701-1153 Rev A November 2002 4-89
Runway Remaining: If enabled, Runway Remaining shows the distance to
the rollout end of the runway. It is shown on the right side of the display as
“RWY” above distance.
When the runway remaining is in feet, the number is rounded to the next
lowest 500 feet. When the runway remaining is less than 500 feet, “0”
shows.
When the runway remaining is in meters, the numbers are followed by “M”
and the number is rounded to the next lowest 100 meters. When the runway
remaining is less than 100 meters, “0” shows.
Figure 4-43:
Approach Modes Rollout Symbols
Runway
Remaining
Ground Localizer
Deviation Scale and
Pointer
HGS Ground
Guidance Cue
Ground Roll
Reference
HGS® Pilot Guide for the Bombardier CRJ 700 Model 4200
4-90 November 2002 9701-1153 Rev A
Deceleration Scale and Pointer: If enabled, the Deceleration Scale and
Pointer are displayed on the ground to show the rate of deceleration. The
Deceleration Scale is located in the center of the display below the Ground
Reference symbol. The scale displays during rollout until ground speed is
less than 20 knots.
The pointer (“>”) moves along the scale to show aircraft deceleration. The
numbers show as -0.3, -0.5, and -0.8 G.
Ground Localizer Line: shows as the aircraft’s precise lateral position
when the aircraft is on the ground. When the aircraft is on course, this
symbol aligns with the Conformal Selected Course Pointer on the Zero-
Degree Pitch Line.
This symbol is removed when the Ground Speed is less than 20 knots.
The Ground Localizer Line does not show if the Rollout Mode option is
enabled.
HGS® Pilot Guide for the Bombardier CRJ 700 Model 4200
9701-1153 Rev A November 2002 4-91
Figure 4-44:
Approach Modes Rollout Symbols
Figure 4-45:
Approach Modes Rollout Symbols
Deceleration Scale
and Pointer
Ground
Localizer Line
HGS® Pilot Guide for the Bombardier CRJ 700 Model 4200
4-92 November 2002 9701-1153 Rev A
Non-Normal Conditions Symbology
Symbology for non-normal conditions is divided into these five subsections:
• Non-Normal Symbology
• Source Messages
• Warning Messages
• Failure Flags
• Miscompare flags
Non-Normal Symbology
See Figure 4-46 thru Figure 4-48. Table 4-21 gives the symbols in the Non-
Non-Normal Group.
Table 4-21: Non-Normal Symbology
PRI
Symbol
Ground
Flight
TO
AIII
AII
AI
RO
F/D
VMC
Unusual Attitude1 ● ● ● ● ● ●
TCAS ● ● ● ● ● ● ●
Windshear Alert1 ● ● ● ● ● ● ● ●
1Unusual Attitude and Windshear Alert automatically change HGS Mode to PRI.
Unusual Attitude: A unique Unusual Attitude display replaces the existing
display when any of these occur:
• Pitch-up attitude exceeds 30º
• Pitch-down attitude exceeds -20º
• Roll angle exceeds 65º
After the aircraft pitch and roll attitudes are less than 10º for more than five
seconds, the HGS changes to the PRI mode.
HGS® Pilot Guide for the Bombardier CRJ 700 Model 4200
9701-1153 Rev A November 2002 4-93
Figure 4-46:
Non-Normal Symbols
Unusual Attitude
HGS® Pilot Guide for the Bombardier CRJ 700 Model 4200
4-94 November 2002 9701-1153 Rev A
TCAS: The HGS shows TCAS Resolution Advisories from the TCAS
computer. TCAS advisories do not show when the Unusual Attitude display
is active.
Preventive Advisory: Preventive advisories do not require any action by
the crew to alter the flight path of the aircraft, but indicate an unsafe zone.
These advisories show as a double-line bracket with two angled lines that
　
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