Actually Somali, I believe that this is a relative easy topic as, as you have said, have good lists. I was originally going to do Star Trek characters which would have been much more confusing.
ANOTHER RULE - If there is more ship with the same name it can only be used once (this includes ship-A, ship-B). For example after the 'Defiant' was destroyed another ship was given the name.
Also I hope you guys realise that the rule I mentioned about using 'U.S.S' also refers to terms like 'IKS' (Klingon ships)