MULTI PHASE
NAVIGATION management & monitoring 47
Navigation accuracy cross-check
Navigation accuracy should be periodically cross-checked with available
radio-navaids.
This can be done by selecting VOR (ADF) needles on EFIS panel and:
−
Checking overlay of navaid symbol (FMS data) by needles (raw
data),
−
Comparing distance from A/C to navaid symbol (FMS data) and DME
shown at bottom on ND (raw data).
For a more accurate check, the navaid may be entered in BRG/DIST
field on PROG page and values compared with raw data.
If DME is not available, bearing may be compare with two or more
different navaids.
In the example below, cross-check is made by using VOR/DME CHW,
which is auto-tuned by the system. Needles (raw data) are crossing
precisely CHW (FMS navaid symbol); distance 9,3 NM is confirmed by
the ND distance circle.
This method may be used for non auto-tuned navaids, which, in this
case, must be forced manually in RADNAV page.
See also Part II: Ch.7.2 – Approach.
CRUISE
THV001
CRZ OPT REC MAX
FL360
FL363
FL391
<REPORT
UPDATE AT
*[ ]
BRG /DIST
254° /9.3
TO
CHW
PREDICTIVE
<GPS
GPS PRIMARY
REQUIRED ACCUR ESTIMATED
2.0
NM
HIGH
0.08NM
AIRBUS A318/319/320/321
© THALES AVIONICS S.A.
J43126AA 00
Summary of Contents for FMGS
Page 2: ......
Page 36: ...J43126AA 00 PAGE INTENTIONALLY LEFT BLANK THALES AVIONICS S A AIRBUS A318 319 320 321 ...
Page 88: ...J43126AA 00 PAGE INTENTIONALLY LEFT BLANK THALES AVIONICS S A AIRBUS A318 319 320 321 ...
Page 294: ...J43126AA 00 THALES AVIONICS S A AIRBUS A318 319 320 321 PAGE INTENTIONALLY LEFT BLANK ...
Page 582: ...J43126AA 00 PAGE INTENTIONALLY LEFT BLANK THALES AVIONICS S A AIRBUS A318 319 320 321 ...
Page 623: ...AIRBUS A318 319 320 321 I II III IV Part V APPENDICES V THALES AVIONICS S A J43126AA 00 ...
Page 624: ...J43126AA 00 PAGE INTENTIONALLY LEFT BLANK THALES AVIONICS S A AIRBUS A318 319 320 321 ...