Talk:Quests/@comment-61.247.22.17-20141111155515/@comment-84.90.161.45-20141111220820

The submarine tender (read Taigei) counts as a submarine (it's a submarine, duh), so 1 submarine tender + 4 subs = 5 subs in the fleet, which should clear it.

So all you have to do is put Taigei as flagship on your main fleet and fill at least 4 of the remaining slots with subs. If you're still not sure, put Taigei as flagship (this is mandatory), and fill the rest of the fleet with subs.

Example fleet that should clear it: Taigei, Iku, Imuya, Hachi, Goya.

You can also use Shioi and Maruyu if you have them, but Taigei must be the flagship.