Alien ship

The ship is a similar size to the Daedalus and seem to be used by an enemy of Earth in an alternate reality.

Overview
The ships seem to be of a similar size to the Daedalus class ship. It possesses high yield energy weapons capable of depleting Atlantis's shields fairly quickly. Little is known about its defensive capabilities except it can survive 3 hits from Asgard plasma beam weapons. It can carry as little as 12 fighters. The rest of the ships systems are unknown.

History
A ship was encountered in an alternate reality when Shepherd team get stranded on board the Daedalus, jumping through realities. The ship was firing down on Atlantis and the Daedalus fired back with it's beam weapons. The ships weapons systems were down but launched it fighters. Before the Daedalus could be seriously damaged, the Daedalus jumped away. The Daedalus later returned to this reality, and the ship launched its fighters again. With the help of that universes Atlantis, the Daedalus was able to destroy the fighters. It is unknown what became of the ship. This ship has never been encountered by the normal universe's Atlantis expedition.