One career mission has the objective of photographing ships at the port of Osaka, at the far eastern end of Osaka Wan (Osaka Bay): to get to the bay, you sub has to negotiate the entrance, which at the northern end of the Kii-suidō (Kii Channel).
This area is infested with coastal bunkers on both the western and eastern coasts, as well as on the one of two islands that break the entrance into three channels...
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