That's awesome! I would never challenge a Jap escort to a gun battle! But I did have to blow ballast once since my boat kept sinking after a severe depth charge attack (S-boat of course) and a big gun battle happened on the surface and my little S-boat got pounded in the end...
(Now I think it's easier to evade with my Gato)
I raised my SD antenna while at periscope depth and it was able to detect ships (?). I thought the SD radar could only detect aircraft and there is no information about the SD radar on Wikipedia
. Do you know anything about it?