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Symbol
AIII
AII
AI
RO
F/D
VMC
Barometric Altitude ● ● ● ● ●
Radio Altitude ● ● ● ● ●
Selected Decision Height ● ● ● ● ●
Decision Height Message ● ● ● ● ●
Selected Minimum Descent Altitude
(MDA)
● ● ● ● ●
MDA Alert Message ● ● ● ● ●
Vertical Speed ● ● ● ● ●
Barometric Altitude: Barometric Altitude is positioned below and to the
right of the FPS and is followed by the letter “B”. It moves with the Flight
Path group.
Radio Altitude: Radio Altitude is displayed directly below the Flight Path
Symbol when Radio Altitude is less than or equal to 2,500 feet. If the Flight
Path Symbol is not displayed, the Radio Altitude is displayed relative to the
Aircraft Reference Symbol. It is displayed in 50-foot increments between
1000 and 2,500 feet, in 10-foot increments between 50 and 1000 feet, in 5-
foot increments between 10 and 50 feet, and in 1-foot increments between 0
and 10 feet.
HGS® Pilot Guide for the Bombardier CRJ 700 Model 4200
9701-1153 Rev A November 2002 4-59
Figure 4-28:
Approach Modes Altitude Symbols
Radio
Altitude
Barometric
Altitude
HGS® Pilot Guide for the Bombardier CRJ 700 Model 4200
4-60 November 2002 9701-1153 Rev A
Selected Decision Height: Selected Decision Height shows as “DH” that is
followed by numbers in the upper right corner of the display. Use the
left-side ARP (Air-Data Reference Panel) to set the Selected Decision
Height.
Decision Height Message: A Decision Height (DH) message is displayed
to the left of the Radio Altitude display when the selected DH has been
reached. “DH” flashes for 10 seconds and then is steady. The symbol is
removed at 5 feet, or if the aircraft climbs above the Selected DH plus 100
feet.
Selected Minimum Descent Altitude (MDA): The Selected MDA is
displayed in the upper right corner of the display as “MDA” followed by the
number.
MDA Alert Message: “MDA” is displayed to the right of center of the
display when the selected MDA has been reached. It flashes for 2 seconds
and then is steady.
Vertical Speed: Vertical Speed is displayed in the lower right corner of the
display. Vertical Speed is displayed in 1000 feet per minute (FPM)
increments. The displayed number is followed by the letters “VS”. The
overall range of the Vertical Speed display is ±15,000 FPM.
HGS® Pilot Guide for the Bombardier CRJ 700 Model 4200
9701-1153 Rev A November 2002 4-61
Figure 4-29:
Approach Modes Altitude Symbols
MDA Alert
Message
Decision Height
Message
Selected
Decision Height
Selected
MDA
Vertical
Speed
HGS® Pilot Guide for the Bombardier CRJ 700 Model 4200
4-62 November 2002 9701-1153 Rev A
Approach Modes Navigation Symbol Group
See Figure 4-30 thru Figure 4-36. Table 4-15 gives the Approach Modes
Navigation Symbol Group.
Table 4-15: Approach Modes Navigation Symbol Group
Symbol
AIII
AII
AI
RO
F/D
VMC
FCS Lateral Modes ●
FCS Vertical Modes ●
HGS Active Mode ● ● ● ● ● ●
HGS Armed Mode ●
Autopilot Engaged Message ● ● ●
Conformal Selected Heading Mark ● ● ● ● ●
Selected Heading ● ● ● ● ● ●
Conformal Selected Course Mark ● ● ● ● ● ●
Selected Course/FMS Desired Track ● ● ● ● ● ●
Runway Edge Lines ●
Navigation Source ● ● ● ● ●
Lateral Deviation Line ● ● ● ●
Glideslope Deviation Line ● ● ● ●
DME/FMS Distance ● ● ● ● ● ●
Marker Beacons ● ● ● ● ●
Table 4-15 continued on next page
HGS® Pilot Guide for the Bombardier CRJ 700 Model 4200
9701-1153 Rev A November 2002 4-63
Table 4-15, “Approach Modes Navigation Symbol Group,” continued
Symbol
AIII
AII
AI
RO
F/D
VMC
Heading Source ● ●
Excessive Localizer Deviation ● ● ● ● ●
Excessive Glideslope Deviation ● ● ● ●
FMS Waypoint Identifier ●
FMS Messages ●
FMS Reference Altitude ●
FMS Vertical Speed ●
Flight Director Transfer Message ●
Autopilot Disconnect Message ●
HGS® Pilot Guide for the Bombardier CRJ 700 Model 4200
4-64 November 2002 9701-1153 Rev A
FCS Lateral Modes: The captured lateral FCS mode is shown underneath
the active HGS mode on the left side of the Mode Separation Line (vertical
line) in the upper left corner of the display. The armed lateral FCS mode is
on the right side of the Mode Separation Line. See Table 4-16 for the FCS
　
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