Sub vs Sub

[Stew U-582]

Ive just got the U boat missions update but havnt had much of
a chance to check it out yet.
I was just wondering if it is possible to play a multiplayer game,
I had a two player LAN gane in mind , with one player as an
american sub and the other as a U boat.
Is this possible?
is there a prefab mission allready there for this?
and if not is anybody working on any missions of this type or
would some sort of mod be needed to play each countries subs in the same mission.

Could someone please explain the current situation to me.

Thanks

Stu