Hmmm, interesting... I could be mistaken, but I thought they were involved in prop engines for small aircraft, and engines for business and mini- jets. In the credits for the movie "Das Boot" BMW Marine is listed, I can only presume they make engines for pleasure and commercial craft. Along those lines German shipyards still make submarines, but whether diesel-electric or gas turbine or whatever I don't know, and I don't know who makes the engines.