Stock game has 0-3 levels & some mods do 0-4. In FotRSU, we tried 0-10. We thought like you, Fifi, that it would sensibly and logically step through the UpgradeClass numbers. There are times you cannot think sensibly & logically with this game. I think though that we did prove that "Renown" is King. The more points you have, the higher the boat level, whether you're in an Sboat or a Gato...