It is even more clear now with the update that we are to enter the T.O Shift. Under DSC-22_20-20-10 P6/8 they have removed the reference line "if GPS not primary", so that would resolve any previous different interpretations from some guys that we don't have to do so.

Besides that, supplementary procedures now come under the normal procedures tab, FCTM has been reorganised completely, FCOM abnormal procedures section tabs are also reworded completely.

Our FCOM dated Feb 17 says;

At takeoff, when the FM position is updated to the runway threshold position as stored in the database, possibly corrected by the takeoff shift entered on PERF TO page.
In flight, the FM position approaches the radio position or the GPS position at a rate depending upon the aircraft altitude.
Note:
The FM position update at takeoff is inhibited when GPS PRIMARY is active.

There was a reference ( that I can't seem to find ) that only required shift distance to be entered when it was greater than 1000'. Anybody have that reference or has it been deleted ?

cs: thanks.

RUMBEAR: to me such practice seems to defy the whole point of POS update at take-off. Never had I seen it written either.