Not real sure what you're trying to do. My understanding: You are trying to generate a listing of other Uboats locations in the game based on game data? If I understand correctly, the only Uboats in the game are the ones Rubini scripted in his HT mods and Sansals milkcows (modified by Rubini). There are no other Uboats in the game, or submarines for that matter. Someone would have to script them in the campaign files first.
If I'm misunderstanding then please feel free to ignore this old guy in the corner.
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PS In the Parameters.ini file I noticed an entry for Aircoverage. SH3 Gen doesn't seem to show aircoverage, did this not get implemented?