[mapuc]

I found some page, maybe you have seen them too

This is about American submarines

https://www.nationalww2museum.org/wa...tegy-1941-1944

https://maritime.org/doc/subsinpacific.php

https://www.defense.gov/News/Feature...ar-ii-victory/

There was also German U-boat operating in the Pacific

https://www.researchgate.net/publica...g_World_War_II

Markus