Attacking a convoy with a Type IX.. Yes or no?

[Thomen]

I have to agree with the lot of you.

So far I have mainly used type VII's, and rarely ventured out with type IX (my longest patrol of 105 days was done in a IX).

After taking my IXB into the medium convoy described above and fighting a surface battle against a small 4 ship convoy yesterday, it is a very nice boat for such actions.

Thanks for input.