2 Questions about GW related to other Subs and reports

[enaceo]

Hello fellow Kapitans!
First of all,thx to the GW team for a great mod~!
Now to the questions-first-can we meet other subs in the campaign other than the II class?I looked trough the Campaign layers but there's a whole lot of ships there and I can't really understand anything.
And second-when you get reports from subs about convoys/S.S.S'/lone ships or when they get orders to get to certain grids,are they really there?If for example u-xyz reports she is being attacked off BF15 and you go there-you actually see some DD's attacking a friendly sub?And what about "enemy" subs-what models do they use because I remember a thread a while back ,someone was using GW and he was on the map screen and got the message "Submarine Detected!" where you choose what action to do so it was probably and enemy sub.