Talk:Expedition/@comment-210.195.246.204-20140601033715/@comment-24980562-20140601040424

When it says "At least 4 SS" it means just that. Have at least four submarines in your fleet and you're good. You can fill the remaining slots if you want, but you don't have to. And if you do, the ship type doesn't matter.

This can be extremely helpful for expedition 31 which requires a level 60 flagship and a combined ship level of at least 200. If your four subs are still kinda low-level, just throw in two high-level ships as extras to meet the requirements.