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and beam
width estimates as follows:
· The distance to localizer calculation is based on the distancetostation
(DME) information, if
the DME is valid and colocated
with the localizer transmitter.
· If DME information is not available, the distance to localizer is based on radio altitude, true
airspeed, glideslope deviation and an assumed flight path angle of 3°.
· If, in addition to invalid DME, the radio altitude is invalid, the altitude is estimated to be
2500 feet above runway, until start of descent (rate of descent over threshold).
· Localizer beam width is based on assumed runway length of 9000 feet and a
beamdeviation
at runway threshold of ± 350 feet.
FD roll commands are ± 30° when capturing localizer. During localizer track mode, the roll
commands are ± 24°.
Roll rate commands are 7°/sec during capture and 5.5°/sec during track modes.
The optimum intercept angle is 45°. If intercept angle is greater than 45°, course cut limiting may
occur.
HDG
LOC Armed.
LOC
Active. “LOC” will flash for approximately 5 seconds, when active.
AUTOMATIC FLIGHT CONTROL SYSTEM
REV 41, Jul 08, 2004 Flight Crew Operating Manual
CSP 700−6
Volume 2
04−10−17
LATERAL NAVIGATION MODES (CONT'D)
Localizer (LOC) Mode (Cont’d)
090°
INBOUND
COURSE
LOCALIZER
TX
LOCALIZER MODE CAPTURE
HDG
040
RUNWAY
090°
INBOUND
COURSE
LOCALIZER
TX
TYPICAL CAPTURE POINT,
BETWEEN 1 AND 2 DOT
LOCALIZER MODE INTERCEPT
HDG
040
RUNWAY
SELECTED
HEADING
040°
HDG
040
LOCALIZER MODE TRACK
RUNWAY
LOCALIZER
TX
MDA
MIDDLE
MARKER
OUTER
MARKER
RAD ALT = 1200’
CRS
090
CRS
090
CRS
090
LOC1 10.0 NM LOC1
SRP
7.0 NM
SRP
LOC1 5.0NM
SRP
HDG AP1 ALT
LOC
LOC AP1 VS
VOR
N
6
33
E
W
24
21
s
15
30
12
3
N
6
33
E
W
24
21
s
15
30
12
3
N
6
33
E
W
24
21
s
15
30
12
3
GF0410_046
20 20
20 20
20 20
20 20
LOC AP1 ALT
20
10 10
10 10
20
20 20
AUTOMATIC FLIGHT CONTROL SYSTEM
Flight Crew Operating Manual REV 41, Jul 08, 2004
CSP 700−6
Volume 2
04−10−18
LATERAL NAVIGATION MODES (CONT'D)
FMS Lateral Navigation (LNAV) Mode
The FMS lateral steering command is a roll command which aligns the airplane with the flight plan
in the FMS. The FGC limits the FMS roll commands to 30° and roll rate to 5.5°/sec.
The FD will transition automatically from FMS navigation to an approach or back course mode, via
the approach preview mode. The selected NAV source must be FMS and NAV radio must be
tuned to a localizer frequency, to select an approach preview.
The previewed approach is armed by pushing APR or BC switch on guidance panel and the
NAV radio must be tuned to a localizer frequency. When LOC
LNAV AP1 FLC
LOC or BC captures, it
replaces LNAV.
LOC AP1 FLC
If the active vertical mode was not VNAV prior to capture, the vertical mode remains unchanged. If
the active vertical mode was VNAV prior to capture LOC
LNAV AP1 VPTH
, then ALT mode will replace
the vertical mode.
LOC AP1 ALT
If armed approach mode was APR (ILS), then GS is armed with LOC capture GS
LOC AP1 FLC
and
GS will capture when GS criteria is met.
LOC AP1 GS
HDG
LNAV Armed.
LNAV
Active. “LNAV” will flash for approximately 5 seconds, when active.
AUTOMATIC FLIGHT CONTROL SYSTEM
REV 41, Jul 08, 2004 Flight Crew Operating Manual
CSP 700−6
Volume 2
04−10−19
LATERAL NAVIGATION MODES (CONT'D)
FMS Lateral Navigation (LNAV) Mode (Cont’d)
PREVIEWED APPROACH
HDG
330
DTK
360
LOC1 23.4 NM
SRP
FMS1
Preview
Navigation
Source
Preview
Course
Pointer
LNAV capture will occur when the airplane
is within 2.5 miles of the desired track and
moving away from it.
LNAV capture will occur when the airplane is at
a calculated point, as a function of track error and
ground speed, if the airplane is flying towards the
　
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