If your mission is to patrol the Celebes..Once you have reached your goal and been informed go sink some ships.....You will have presumably passed the date where Borneo falls to the Japanese..Just head up north you gonna find oodles of contacts...I think the criteria "Go sink ships" does not mean you have to stay in your allotted patrol...Something which I like about SH4 you can skedaddle out of the area to a more profitable zone....And the area between Indonesia and Borneo are absolutely Choc full of ships/convoys....
Deep six
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