Originally posted by Bobucles:

Boats tend to not survive more than a few days at a wild dock. Smack them down and stuff the parts in a chest.

Since i dont anchor it in rivermouths anymore, wipe out spawns close by, build a workbench close by and place at least 3 fireplaces around the anchor point i hadnt any boats destroyed anymore. Mostly they not even had any damage when i checked them.