the only thing i have to set a finger on is, when u are driving a big container ship in the midde of the ocean and hit a little little and i mean a little floating bouy u get 60 % damage
In reality hitting a bouy should cause no real damage, especially in a large ship, might sink the jet ski though
Check out the video link below, shows a ship hitting a bouy, because the bouy is on a anchored chain it just goes under the ship then bobs back to the surface. the ship would only suffer scrapes to the paintwork.
http://www.youtube.com/watch?v=fk1unIEAW7s