Wolfpacks with The Wolves of Steel

[Hari123]

Hello!

I have question about the Wolfpacks in TWoS mod (latest version, no problems so far - great mod). I'm at Nov. 1940 and found a convoy, made a contact report and the BdU replied to keep contact with the convoy. After a few contact reports later, a friendly U boat replied that it's in position and I should keep up with my bearing signals. But I didn't know how to do that, is that even a feature of the mod or should I just continue to send contact reports?

A few moments later that friendly submarine with in sight, but didn't attack, it just made some circles. Then I've decided to attack the convoy and I've sunk a few ships.

But here is my question:

Why wasn't the friendly U boat attacking? Have I done something incorrectly?

Thanks for any advice!