First of all, I wouldn't see this fit as a full blog post, since it only contains random babble.
This is a Combined Fleet map with no restriction on composition. Upon completing, it will reward USS Enterprise, while also having chances of dropping Montana, Shinano and A-150 upon S-rank. The boss is , a hard-skinned installation against which Type 3 Shell has no effect.
Boss Battle Node
艦隊の針路を選択できます。提督、どちらの針路をとられますか？ You can decide the fleet's course. Admiral, which heading should we take?
It is an archaic reading for 'izanai'. But they use this word when somebody is led unknown world in modern Japan. In this case the deep-sea is unknown world for human beengs, so I consider 'izanai' is collect reading.