BC-304 "ILIAD"
DAEDALUS-CLASS BATTLECRUISER

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The Daedalus-class battlecruiser is a fictional starship in the science fiction television series Stargate SG-1 and Stargate Atlantis. Also referred to as a Deep Space Carrier and a 304, the Daedalus class is the second generation of Earth battlecruisers and is designed to combat enemy ships, such as the Goa'uld Ha'tak-class mothership. It succeeds the Prometheus as the main vessel operated by the United States Air Force and its allies on the two series.

Five Daedalus battlecruisers have been built and four are in active service, including the Daedalus, the USS Odyssey, the USS Apollo, and the Iliad. The Russian Air Force-operated Korolev was destroyed during the Battle of P3Y-229.
 


 

TECHNOLOGY

The Daedalus class is equipped with much of the same advanced alien technology as the Prometheus, only all integrated into the original design prior to construction, as opposed to being "tacked on after the fact", as Lt. Col. Samantha Carter puts it, as was the case with the Prometheus.

ASGARD

The Daedalus class contains a great deal of Asgard technology, notably its intergalactic hyperdrive, shields and beaming technology. The Odyssey is also equipped with energy weapons, an Asgard computer core, and other technologies, which Samantha Carter describes as "truly amazing". In addition, the Daedalus itself uses an Asgard engineer named Hermiod, who is assigned to oversee integrated technology, until the Asgard race commits suicide due to a genetic disorder.
 
General Characteristics
Class Daedalus
Registry 304
Fighters 16 F-302 Fighters
Armaments
 		 Railguns
Mk 3 and 8 Nuclear ordinance
Defense
 		 Asgard Shields
Trinium Hull
Propulsion Asgard Hyperdrive
Power Naqahdah Generators

GOA'ULD / ANCIENT

The Daedalus class ships also have the same ring transporters as Goa'uld vessels, which are known ultimately to be an Ancient creation. These rings are compatible with rings onboard Ori motherships as well as traditional Goa'uld emplacements. When temporarily genetically enhanced by Lantian technology, Rodney McKay wrote a formula on how to enhance the shields on the Daedalus, it is unknown if it was ever used.
 

TACTICAL SYSTEMS
The Daedalus class carries numerous Mark III and Mark VIII tactical nuclear warheads and a number of railguns. Generally speaking, the primary armament used by the Daedalus-class vessels is the missile complement which is fired using vertical launching systems, with all missile emplacements appearing at the bow of the ship; only the Odyssey has been seen with ventral hull emplacements. Unlike conventional vertical launch systems, it is possible to access the loaded missiles from inside the ship, to swap their warheads, or entire missiles. In Stargate Atlantis season three's "No Man's Land", Colonel Caldwell orders the safety protocols to be disabled so that it is possible for them to fire all their Mk. III nuclear missiles the moment they exit hyperspace to increase the chance of a missile achieving a direct hit and not being intercepted by the Wraith Darts.

In addition to a thick armor hull that is capable of withstanding brief but intense fire from a Wraith Hive-Ship, the Daedalus class vessels are fitted with advanced Asgard shielding that can defend the ship from incoming hostile fire.

There is no Asgard weaponry fitted to any Daedalus-class vessels prior to the Stargate SG-1 finale episode, "Unending", with the Asgard previously going so far as to safeguard their beaming technology by preventing its use as a weapons delivery system.
 

During the series finale, however, the Odyssey is heavily upgraded with the latest Asgard technology, including an Asgard computer core and energy weapons capable of successfully destroying an Ori mothership with several direct hits.
 
DESIGN
As seen in Stargate Atlantis, the Daedalus has notable physical differences from the Prometheus. It is sleeker and lacks the large aft tower. The Daedalus-class also has four additional engine emplacements on each side, making the rearmost part of the ship wider than that of the Prometheus. There is a large square structure on the ship's bow the purpose of which is unknown. F-302 bays are located on both sides of the ship, below and out from the main hull along the rear.

The Daedalus' shields are also capable of standing up to multiple Wraith Hive-Ships or Goa'uld motherships in combat.
   
HANGER BAY
The Daedalus class has a hangar bay on either side, but all the F-302s are in the starboard hangar. The Daedalus is capable of carrying up to 16 F-302s, but so far it has only been seen carrying eight so that the other hangar can be used for various needs. The hangars come with doors and shields to prevent decompression and expulsion into space.
 
SHIPS OF THE LINE
The USAF operated Daedalus (Hull-marked 02) first appears in the Stargate Atlantis episode "The Siege, Part 3", commanded by Colonel Steven Caldwell. The Daedalus plays an instrumental role in defending Atlantis, and subsequently serves as an intergalactic ferry between Earth and Atlantis.

USS Odyssey first appears in the Stargate SG-1 episode "Off the Grid", and becomes Earth's primary-defense when the Prometheus is destroyed in "Ethon". Odyssey is commanded by Colonel Paul Emerson from "Off the Grid" till "Company of Thieves" when he is killed in the line of duty. The Stargate SG-1 episode "Family Ties" reveals Odyssey's succeeding commander is Colonel Davidson.

The Russian Daedalus class vessel Korolev appears in the season nine finale, "Camelot", under the command of Colonel Chekov. The Korolev is destroyed in battle by two Ori mothership's.

Appearing in the Stargate Atlantis season three finale, "First Strike", the Apollo, commanded by Colonel Abe Ellis, is used in a preemptive attack against the Asurans.

The map color behind the Colonel's chair and the lighting on each of the ships appears to be color coded. The Prometheus is white, the Daedalus is green, the Odyssey is orange, the Korolev is purple and the Apollo is Blue/Indigo.

The USS Iliad, was constructed as the first Daedalus class ship fully utilizing both Ancient and Asgard technologies. The Iliad serves as a internet based group for the SG-Operations fan group and is commanded by Maj. Carl Bennett. 

Name Hull number Base of Operation Status Commander
Daedalus 02 Atlantis Base / USA Active Col. Steven Caldwell
Odyssey 03 USA Active Col. Davidson
Korolev 04 Russia Destroyed Col. Chekov
Apollo 05 USA Active Col. Abe Ellis
Iliad 06 USA Active Maj. Carl Bennett

The Asgard Legacy

The Odyssey visits the Asgard home planet Orilla in the Stargate SG-1 finale episode "Unending" at the behest of the Asgard. Thor explains that the Asgard are giving the Tau'ri all of the knowledge of the Asgard, as a disease they have contracted is causing their bodies to degrade rapidly; consequently, the Asgard will soon become extinct. As the Asgard finish the upgrades to the Odyssey, several Ori motherships exit hyperspace nearby. The Asgard return to Orilla and as their last act destroy the planet, leaving the Odyssey as their legacy. Soon after the planet's destruction, the Odyssey has no choice but to fight, and, after a number of hits with its new Asgard weaponry, successfully destroys an Ori mothership.
 

Bomb bay
The Apollo and Iliad are equipped with a bomb bay with an attached observation and control deck. From this bay, it can deliver such payloads as the Horizon Weapons System, which contains six Mark IX "Gatebuster" warheads and 4 decoy warheads.

ILIAD
Built following the Asgard's departure with significant use of both Asgard and Ancient technologies.  The overall mission of the BC-304 Iliad is to support the SGC and SG-SOC in the defense of earth. The Iliad will also explore new worlds and try to return with new technologies for research and future development for the defense of earth. The the Iliad is under the command of SGC and sometimes tasked with supporting the functions of the SGSOC's special operations requirements. Once deployed its units will coordinate with the local SGC and/or SGSOC commanders to accomplish the overall mission objectives and goals.