RSRD attempts to recreate shipping traffic as close to historical as possible, in that at the beginning of the war, the Japanese had a lot of merchant and naval targets for subs. As the war progressed, and losses mounted, the sub service ran short of targets.
Also, later in the war, the merchant ships stayed as close to shallow waters as they could, which made things tougher for the subs to go after them. But many sub crews had to count up how many sampans, junks, and fishing boats they could sink with the deckgun(s).
Other duties like dropping supplies, commandos, agents, and lifeguard duty also filled the agenda. Only thing I have yet to do, is get called for lifeguard duty.
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A legislative act contrary to the Constitution is not law.
-John Marshall Chief Justice of the Supreme Court
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