After two weeks and a few days, here's version 1.21, which fixes the issues with all US harbours. I've also done a few adjustements to Singapore and Ominato. Once again, please report any issues you find.
I also confirm that this mod works with Real Fleet Boat and RSRDC.
There is a small issue that I can't seem to figure out. Whenever I pass close to San Pedro or Huemene, the fishing boats start accelerating away in a straight line. They all have the "docked" button ticked. I have only seen this happen in RFB.
Has anyone noticed this sort of issue before ?