OT: How exactly did sub vs sub sinkings play out?

[shoot-kill-win]

Originally Posted by AVGWarhawk

A good read is the USS Batfish sinking 3 subs in 3 days. All at night and using radar. The Japanese subs radar equipment left odd images on the US sub radar scope that lead the Batfish into excellent firing position. It was a cat and mouse type stalking but the cat had better night time vision using the radar.

As AVG says 3 IJN subs in 3 days, however the last sub unexplained dove right before Batfish was going to make its attack, and stayed under for about an hour then came back up, it is unknown as to whether the IJN sub saw the Batfish since it dove, but the Batfish was right on it when it surfaced and got it.