You should double click on the name of the hydrophones you want, not the pic.
But there are bugs in the uboat and crew section of the office. I'm having problems putting medals on my crew. Even when there are highlighted medals I'm told to complete a patrol first. Tried to put a side emblem on my boat, and I'm told I already have it, which I don't.
You just have to leave the screen and try again, and then suddenly it works
