Kerry's people will simply say that 'served with' means 'on his boat.'
We need to be able to see the 60+ pages of documentation that the vets sent along with the ad.
In another thread, it was said that these boats had 6-man crews. They had more people than that lined up at the Democrat convention. Therefore 'served with' by necessity means more than 'on his boat,' in their own usage of their rhetoric.