I think lurker was getting around to doing them, but never actually finished the mod. You can't get them like with Stiebler's or h.sie's, but you can put a submerged AI sub and maybe a surfaced AI sub into convoys, just like in SH3, but you will not get the response that you do with SH3. I think I may have come up with an idea to use in the DynamicMiss file, which SH3 does not have, but I am not certain it will work just yet... Stay tuned FotRSU fans!... lol