Talk:Tutorial: FAQ/@comment-1820055-20140326061746/@comment-14.192.208.208-20140406164731

Line abreast is a defensive formation, it reduces your firepower, but raise your defense, so that particular tactic is trying to give you better chances of getting to the boss node without any ships in red.

However, I personally beat 2-4 with 4 BB + 2 CV (ise, hiei, yamashiro, fusou, akagi, souryuu), line ahead all the way.