Try this for their images:
FotRSU_Subs.7z
which has a pdf inside, recently revised
I would say to leave the airplanes off of the four IJN subs, even though that is the way the player will "normally" encounter them, but that is planned to change in the near future... given time, of course... If there is a way to "draw" them in a little side-box to signify that they can launch planes, fantastic, but not necessary...
