Here's also a pic of Galacitca blueprint from the BSG rpg games I've found.
http://media.battlestarwiki.org/images/ ... prints.png
I was looking over this image before while researching for my own edification. General quarters isn't a place. It's a battle condition of readiness. So this image is suspect. Also, the RPG even has the Cyrannus star system wrong. See the official picture in the link below.
http://io9.com/5742034/a-detailed-map-o ... e-colonies
As for the Atlantia, there seems to be no information as to class. However, it's a good guess that she is either a standard hull of the same class as Valkyrie or one of the modified versions as seen in Razor. I am pointing this out as the result of the attack around Caprica showed many Valkyrie type hulls. also, if it wasn't stated directly, it was certainly implied that the Galactica was the last of her hull type in service.