This map involves many references to The Shield of Hachinohe which is the nickname of Inagi:
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;Phase 3
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*Is based on the final engagement of Shirakumo.
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;Node M3
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*The shortcut and debuff route and procedure which involves 11 Fast+ and 1 Slow Ship is based off a real event wherein a slow ship chose to be sacrificed to a submarine fleet to allow the other ships to maintain high speed and escape the area.
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;Node X
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*Is the final area and coordinates where Shirakumo was sunk off the coast of Akkeshi, Hokkaido