Your encounters were all Petes, torpedobait? Were you running your SD radar? I've found that while I get a better fore-warning of their approach, I also get them coming straight at me, like I've got a big bright light turned on in the middle of the night...
yyzBegonia, do you know which kind of airplane it was that attacked you? I can't speak to the speech... sounds strange, eh?... can't speak to the speech...
It has seemed to me more than once that the Petes especially might be a bit too good... The problem will be figuring out which ships or seaplane base it is that they launched from... In the meantime, be governed by CINCPAC and CINCAF as to being submerged during daylight hours. Of course, when you do not reach your patrol zone location in a timely manner, you will be reprimanded for staying submerged so much...