Adriatic
From Battlestar Wiki, the free, open content Battlestar Galactica encyclopedia and episode guide
The Adriatic is a ship of unknown class, but is the first ship other than the Galactica and its Vipers that is known to the audience to have weapons. It is armed with ship-to-ship missiles of a limited range.
This ship, or at least a majority of her crew, were part of Roslin's fleet.
It was in weapon's range of Kara Thrace and her party's stolen Cylon Heavy Raider when it returned from Caprica, though it did not fire. (Home, Part I)
Notes
The name of the Adriatic is yet another naming anomoly, as it appears to be named after the Adriatic Sea, an arm of the Mediterranean Sea that seprates Italy from the Balkan peninsula on Earth.