If you go here and look at the two black and white maps in this thread,
http://www.subsim.com/radioroom/showthread.php?t=178515
one map is TF, one is invasion groups. You can see the invasion force I'm talking about leave Ambrom Feb 16 and heads to Timor Feb 17-20. Timor is WNW or Darwin. See the strait between Timor and the island north, that's where you want to sit. Another convoy comes back north later. I thought it was the same group, but is a different one, just a few DD's and bunch of merchants. May want to ignore these and save your torps for the carriers or go for a few of the Nagaras.
Also lot's of friendly ships, so don't let em spook ya.
If you look at the TF map at the very bottom left it reads carrier attack force that leaves Kendari. If you look at it's course it come through the same Timor pass, so be in the same spot. This is a biggie, 5 carriers, 3 BB's, many CAs, lots of DD's, about 20 of them. You see carrier planes come through first, so that's the clue. Just be careful, they sense you you'll have a hornets nest of planes and DD's on ya.. I think it comes through Feb 25. It goes all the way around Sumatra to Singy and leaves in April, another good time to catch it.
Course all the courses on these map are about identifcal to RSRD plot, so you can really choose where you want to attack, just easier at straits so you don't miss them.
After attacking this group, you can hurry back to Java to Sura, but got to hurry before it falls, think the 29th, but if you have torps, there are several invasion groups and TF off Java, including the large 50 ship Java invasion group.