I often like to run an S-Boat out of Brisbane in 42 you can use the SJ then and you also are in a very busy AO as well.Though for me for some reason when I play an S-Boat out of Brisbane the weather is foul so I get most kills with the deck gun though fog by getting his bearing and getting as close as I dare taking blind shots at where I think he is until I hear a shell hit while praying that he does take a pop shot at where he thinks I am.