depends on the plane. and my boats flak configureation
Hurricanes, sword fish and wellingtons are usually less of a threat and reletivly easy to down
Sunderlands and PBYs are so so, I'll take one on, but not two or more. and Ill only do this if I have C38s
Liberators and Avengers are nasty so I hit the floor (unless I have a SAM luancher on my sub).
Cant comment on any of the new planes in GWX as Ive yet to see one. The beaufigher looks like it might not be worth tangling with.
As Ive said before crossing Biscay in the late war is too easy, In reality Uboat commanders were deeply troubled by air attacks over the suicide run that was biscay and felt safer once they were out to sea! In SH3/GWX its the opposite. This is one area of the game that definatly needs more work.