Talk:World 2/@comment-116.102.105.139-20180724045708/@comment-30501447-20180724060755

if you do 2-3 to collect resource (and slowly doing quest on the way), use 3-4 non kai SS (not SSV) after lv10 and preferably not too high leveled (for quick docking w/o bucket). Best to have 2 - 3 set of non kai SS sub to rotate and not have to wait between sortie (ie sortie repeatedly w/o worrying about morale)

If you do 2-3 just for quest (and save resource instead of sortieing high cost surface ships), use 4 - 6 high level SS(V) is fine. More sub = less chance to be damaged. You just have to wait longer when docking, but kai ships is sturdier, have higher evasion and better chance to sink enemy ships.