Board Thread:Questions and Answers/@comment-32724723-20170803150930/@comment-30750174-20170803165909

Well with the event coming you should be able to get some more submarine, and if I remember correctly a new foreign sub is coming as well. Plenty of opportunities in the near future, but if you are feeling a bit lucky try clearing 1-5 a couple times; you can get I-8, Akashi, and I-19 at the boss node though it depends on your HQ level though.