[Suicide Junkie]

Hey, whatever you want is fine. Just slip into the "vehiclesize.txt" and change the 2-letter code.

Thing is, DS is used for the ship size, and you can put whatever you feel like on it. Make it a carrier, a supply ship, an artillery piece, a luxury liner.
It still has the same code.
If you want to have the codes relate to what they do, change your "designtypes.txt" to have "DD - Basic Destroyer" and "DE - Destroyer escort" instead of "attack ship"

I don't really care about the codes, but I ususally have only a small fleet of really expensive, legendary kickass ships, so I know each one by name.