Tnx guys I'll get GWX soon (after 1.04 is released I think).
I lied a bit

I saw just now... I saved the game still on patrol and bagged me a C2 making it a total of 11k tons. I could get VII b4 2nd patrol cause I planted a Flak gun on my IIA.
He came to me so all I had to do was get his track (and I screwed up there) still made a good guess on range (using stady meter (lousy bit of equipment) AoB and speed) I aimed for the sweet spot (front on superstructure) launched 1 fish at 0 gyro, locked scope waited till gyro said 355 fired 2nd fish.
Result: Fish 1: hit just aft of smokestack..
Fish 2: hit under 2nd mast of front due to ship breaking in 2 seconds b4.
Resulting me having 3.1k reknown enuf for a nice VIIB... and the better hydrophone I need the speed