TRACKING THE LOCALISER OF THE OPPOSITE RUNWAY
If the aircraft is required to track the localiser of the opposite runway, the ILS must be correctly set on the MCDU RADNAV page to allow monitoring of localiser deviation in the correct sense. If the ILS is in the database. The FMGC should automatically tune the correct frequency and course, which should be the take-off runway course preceded by a "B"
If the ILS is not stored in the database or the FMGC fails to tune the correct frequency and course, manually insert the ILS frequency (or ident) and the take-off runway course preceded by a "B" for example, if the ILS frequency and associated course of the opposite runway were 109.9 / 073°, ILS and the take-off direction was therefore 253°, insert frequency 109.9 And B253,"B/C" will be displayed on the ND (Rose LS) and PFD (LS) in magenta. If the RWY/ILS MISMATCH message is displayed in the MCDU scratchpad, it may be disregarded.
Use Nav mode for departure and monitor localiser tracking on the PFD by pushing the LS pb on the EFIS CTL panel or the ND by selecting Rose LS. Both the PFD and ND will display localiser deviation in the correct sense. Do not select the LS pb on ISIS since the ISIS displays localiser deviation in the reverse sense.
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