Captain_BH, RAT 5
With Airbus FPV so many calculations are not necessary. There are two ways of doing the approach:
1. Old fashioned way point the nose at the threshold and keep the FPV(bird) at three degrees. Since it is flight path it will take care of the required ROD. Keep the ATHR.
2. FMGS way use Radial in function make direct to RW threshold and insert the radial in. That will align the yoyo(VDev) to threshold and use it as GS.
Simple.