Hi sorry for not replying earlier.
Vias is what NSF told you thanks NSF(i never questioned the fact that you know the books :-), also known as the Approach Speed Target(aka IAS target), which we sometimes refer to it as VIAS and which is the speed which is shown by the magenta bug.
Sorry if i misled you by refering to it as VIAS.
As NSF said, the speed on the bus will never be lower than VLS+5 so you can say that one is always guaranteed protection for low energy. I will have a look at the spreadsheet that NSF kindly sent me tomorrow morning.
And yes the bus can be landed in a x-wind gusting 50 kts for all you punters out there whose main hobby on this forum is to slander.
@Carloss - 50kts is not outside limits, the x-wind limit on the bus is what has been demonstrated by the test pilot and given as 33 gusting 38kts, (FCOM 1), however there is no upper limit for x-wind. And anyway stop being an idiot.....maybe we all learn something from this.....i got me flight sim...let me have a go......