Most of us use that one, but I prefer this one with RSRD as you can watch the fleet movements and pick better places to ambush along the course.
http://www.historyanimated.com/pacificwaranimated/
If you use RSRD, these two maps are great for early war, one is for invasion forces, the other TF's. All of these are in RSRD almost to perfection, just pick a date, find a place to ambush, straits work well and you should find all these groups.
Just save them to my pictures and you can enlarge to view or just print them
