Talk:Christmas 2013 Event/@comment-115.74.209.121-20140103125546/@comment-36.73.66.95-20140104030253

If you have turbine, especially the +10 one, equip it to the sub. It will improve her survivability. If the sub hasn't reached level 10, equip midget sub and run 1-1 until then. Once reaching level 10, the sub will gain preemptive torpedo attack ability, thus negating the need of midget sub and free up the slot for turbine.

In 2-3, the *really* dangerous nodes are nodes B and C - basically, the first enemy nodes you encounter - because they always have no less than 4 ships that can hunt subs. If the sub can pass those two nodes, the rest should be almost guaranteed S rank (given that your sub can deal damage) because they don't have anything that can hit subs. Except the boss node.