You never stop learning with the airbus.
The Fcom also states-
This pushbutton arms, disarms, engages, or disengages the approach modes:
LOC and G/S modes, if an ILS approach is selected in the active F-PLN.
APP NAV-FINAL modes, if a non precision approach is selected in the active F-PLN.
Dsc22_10-20-40
As to ground speed mini the fcom states
TWR HEADWIND COMPONENT
The TWR HEADWIND COMPONENT is the component of the MAG WIND projected on the runway axis (landing runway entered in the flight plan). It is used to compute VAPP and GS mini.
How does it compute it correctly if there is no runway in the F-PLN? I was taught that this is why we activate the secondary when circling.
Last edited by tubby linton; 18th Apr 2015 at 13:50.