[TorpX]

Originally Posted by BrucePartington

Only the tankers were damaged.
Again, no heavy seas, no air attacks, no shallows. They just rammed each other for no apparent reason.

It sounds like either they were trying to evade you and bumped into each other, or in making a course change, they messed up. Different types of ships have different turning characteristics. I've read here that, historically, the intervals between ships were greater, than in game. The ships' AI obviously leaves something to be desired.