Thales FMGS - DESELECT NAVAID Function

MULTI PHASE
42 NAVIGATION management & monitoring
 DESELECT NAVAID function
If a navaid is reported as unreliable
or unserviceable, it should be
deselected on the SELECTED
NAVAIDS page:
NAVAID ident [1R].........Enter
Ex: LMG.
The entered navaid is deselected,
and can no longer be auto-tuned for
display or computation of position.
In this example LMG is removed
from list of auto-tuned navaids, and
replaced by next available VOR DME,
CNA in [1L & 2L].
It may however be manually tuned
by pilot entry on RAD NAV page or
by RMP.
Brackets appear [2R] enabling
another navaid to be deselected.
Up to 6 navaids may be deselected
in this way.
Ex: LMG, SFD, RBT, DPE, CAN.
A deselected navaid may be restored
by:
SELECTED NAVAIDS
VOR/DME AUTO DESELECT
<LMG 114.50 [ ]*
VOR/DME
<AGN 114.80
VOR/DME
<MEN 115.30
ILS AUTO
<IRR 110.30
DESELECT
{GPS
<RETURN
LMG
SELECTED NAVAIDS
VOR/DME AUTO DESELECT
<CNA 114.65 LMG
VOR/DME
<CNA 114.65 [ ]*
VOR/DME
<BMC 113.75
ILS AUTO
<IRR 110.30
DESELECT
{GPS
<RETURN
SELECTED NAVAIDS
VOR/DME AUTO DESELECT
<BMC 113.75 LMG
VOR/DME
<BMC 113.75 SFD
VOR/DME
<AGN 114.80 RBT
ILS AUTO
<IRR 110.30 DPE
DESELECT
{GPS CNA
<RETURN [ ]*
CLR
SELECTED NAVAIDS
VOR/DME AUTO DESELECT
<CNA 114.65 LMG
VOR/DME
<CNA 114.65 SFD
VOR/DME
<MEN 113.75 RBT
ILS AUTO
<IRR 110.30 DPE
DESELECT
{GPS [ ]*
<RETURN
− using CLR function,
− or overwriting with another navaid
to be deselected.
In this example deselection of CNA is
cancelled by CLR function; CNA is
again auto-tuned for display and
position computation, shown in [1L &
2L].
Navaid deselections are cleared
when FMGC phase switches to
DONE, or if second NAVdb is
activated.
J43126AA 00
© THALES AVIONICS S.A.
AIRBUS A318/319/320/321