Dustybin,
I understand the context of your jab now, and in that context no offense is taken. As an Army sailor we took our fair share of jabs at the Navy. Infact, when I retired from the Army I took command of a Navy research ship. I rigged all the computers on the bridge to play the Army song when they turned on. We all thought it pretty humorus to have an Army officer in command of a Navy ship. If the ship you went on had USNS on the Brow, it had to be a Civilian (Military Sealift Command) ship. Either that or they stole somone brow.
Anyway mate, a quick google search using USS or USNS will list the ships with those designators.
While the different ferries would be nice, what we really want is the environments that they operate in.
And to have them connected in on line environment.
Kevin