[AVGWarhawk]

I believe the game is re-establishing the state of the boat before the save...if the boat was damaged before the save. I have run into this problem but I do not have hull damage add or anything. If your boat was not damaged at time of save and this happens on the next start up, then it is a bug. Your boat should not have renown costing damage none the less. Understand that saving while submerged can affect the save and also in the presence of warships. I have not experienced this myself but others have. They usually save surfaced and away from warships.