Naval combat

[Galapogos]

Some people have brought up implementing naval combat in planetside next, and it was also brought up in a few questions in the survey. I was just wondering how close to scale warships could be, especially in a mmo like planetside, because I always think it ruins the realism in a game when objects are not at least roughly to scale. I was also curious as to whether there are any physics engines that would allow players to roam freely through a moving object like a ship, instead of being stuck in a specific seat like every game I have seen before that has vehicles.