X-303
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SGPrometheus.jpg
The X-303 is a fictional spacecraft in the science-fiction television show, Stargate SG-1. The X-303 is Earth's first capital starship. Although small compared to a Goa'uld Ha'tak mothership, it is a large battlecruiser nonetheless. Despite some difference of opinion (Colonel O'Neill wanted to name the ship Enterprise), the prototype was finally named the Prometheus. Although Prometheus is the first commissioned ship of her class, the X-303 series has gone into production as the BC-303. The BC-303 is designed to carry up to 8 F-302s for long-range duty. Both the F-302 and BC-303 are capable of hyperspace travel. Prometheus has a sister ship named Daedalus. As part of an agreement regarding the use of the Russian stargate (following the loss of the American stargate), Russia has received the plans for both the X-302 and the X-303.
Prometheus
The prototype of the X-303 series, Prometheus was hijacked before completion by rogue NID agents demanding the release of Colonel Frank Simmons and the Goa'uld infested Adrian Conrad. SG-1 managed to reclaim control of the ship, and were enlisted by the Asgard to help them trap the Replicators within a time dilation bubble. The Asgard thanked Earth by fitting advanced systems onboard the X-303.
The ship was subsequently finished and began a shakedown cruise. A problem with the hyperdrive engines forced the crew to eject the reactor into space, stranding the ship on an alien world.
Prometheus remained there until she was fitted with the hyperdrive taken from a captured Al'kesh bomber. Unfortunately this meant that the ship was underpowered, since the Al'kesh reactor couldn't generate the power needed to fully operate Prometheus. She returned to Earth, but was attacked by an unknown alien ship en route and suffered damage while hiding from it inside a corrosive nebula. The damage was repairable, however.
Prometheus served in the defense of Earth from Anubis's forces, and was almost destroyed before the Ancient weapons found in the Antarctic outpost were activated.
The ship is operated by the U.S. Air Force, and its crew consists of Air Force personnel. Operationally Prometheus (and her following sister ships) are under the Pentagon's "Office of Homeworld Security".
Three officers have been shown in command of Prometheus: Col. William Ronson (Seasons 6 and 7), Major General George Hammond (both parts of "The Lost City") and Col. Lionel Pendergast (season 8).
The Prometheus uses Asgard technology in its hyperdrive engine and in its weapons and shields (There may be other uses of Asgard technology installed). This technology was fitted by the Asgard in return for Earth's help in fighting the replicators. It also relies on some Goa'uld technology the most notable being the transport rings, based on the Ancient's Stargate design.