Im playing RFB on 95% so no cheating there.
Basically I hugged the southern coast of the Rabaul inlet and just ran silent at 1/3 for almost half a day.
The thing that saved my bacon was the calm waters...I was able to fire from out past 6000+yards with Mk14's on slow speed and retreat a good bit before the first hit.
Luckily no duds this time
The Destroyers ran into the harbor while I was trying to run out.
Plus the water is a bit deeper to the south as well.
Oh well in real life there would have been nets deployed so take it with a grain of salt.