Mod from Onealex

[vilir]

Hi all!
I found this mod recently and fell in love. God save the author
I'm using Onealex 1.52, no other mods, and have a few questions:
-started a career in 1st flotilla on IIA uboat. Can i change IIA for VIIB uboat somehow or i need a strat new career? In GWX mode, I could buy IID or VIIB for renown points.
-On the map F5 in the upper right corner you can find a pop-up compass repeater. Sometimes another tool pops up in this place - an attack disk or similar. It would be great to use it, but I can't figure out how to find it. It only pops up randomly. Is it a bug?
-I strongly need advice how to find enemy ships. Sailing to the east coast of GB - AN55, 52, 47, dive on 30-40m and use hydrophone - nothing. Some times small coastal vessel, but most of time - silence. Tried sail to the Orkney islands - only bunch of warships there All the ships that I sank so far, I met on the surface somewhere in the middle of the Atlantic