Think of it as a jelly fish floating in a 3D airspace. If you know where it is and is going to be when you are in the air than you can always route arround or over it. Knowledge in dispatch allows you to fly safe.
Hmm ok. But in this case ( the graphics has changed now cos its updated ), the "jelly fish" was covering their destination airport. Right on top from ground level to 150 i think and it was a red alert level ( from the VAAC graphics).
I thought that was a pretty straight forward no go situation.
Again, this thread is NOT meant to criticise the guys that flew into the said airport. Its for my own learning benefit thats all.
thanks.