[={TTU}=Zumbach]

I have a little problem with doing a FMB mission that the RAF will attack a german convoy that it has static ships and i am doing all the waypoints , the position to attack the convoy is a Ground Attack and when they are at 100 m altitude they are climbing up to 200m and then they drop the torpedo from 200m , How could i do a proper torpedo attack ?

Help will be much appreciated