|Max. warp:||warp 9.99 (theoretical)|
|Armaments:|| 12 Type-10 phaser arrays|
3 Photon torpedo launchers
While the USS Voyager (NCC-74656) was in the Delta Quadrant, the crew discovered a new type of propulsion technology, dubbed the Quantum slipstream drive. Starfleet Command, in agreement with the Federation Council, concluded that a new class of starship was needed. Hence the Cosmos-class starship; Similar in size of two Nebula-class starship.
In 2380, Admiral John Hayes was aboard the USS Guanine (NX-88708), the Cosmos-class prototype, when there was a malfunction during the ship's Quantum slipstream drive testing trials. Commander Taylor Ferguson, the ship's executive officer, Admiral Hayes, and the entire engineering crew died in the explosion. ("The Teacher")