The Bus is officially called a CXD-23, rebuilt by Stark's El Redondo people.
As for a 'Carrier fleet, again, this was implied in the fact that there was a pennant number on the one we saw in Avengers.
Just seeing that "64" implied there'd always
been more than one of those boats around.
And for Cinema'Verse purposes, the Triskelion looks to be on the Virginia side of the Potomac as opposed to the "Ultimate'Verse" edition being initially in the NYC region.