Highlight notes: * Green: Outstanding * Yellow: Above average * Since the Luck Stat is difficult to modernize, it is listed as Base(Max). * Submarines can only be attacked by destroyers, light cruisers, torpedo cruisers, aviation battleships/cruisers with seaplane bombers, and some light aircraft carriers. In addition, they prioritize attacking submarines first meaning other ships can get away with no damage done to them. * Submarines are the most resource-efficient class in the game; they cost almost nothing to deploy or repair. Furthermore, they constitute cheap additions towards multiple expeditions that can utilize them. * Submarines equipped with Kouhyouteki will perform a preemptive torpedo strike before the shelling phase. After reaching level 10, they'll be