Sigma Supreme

Sigma Supreme is an Autobot from the Animated continuity family.

Sigma Supreme was the last of the Omega Sentinel weapons developed under Project Omega. He was wounded during the Battle for Iacon, and placed in emergency stasis by Perceptor. He now serves as the flagship of Autobot navy under the name Steelhaven, and has been enhanced with a Vanguard Booster module. He is bonded to Ultra Magnus, who serves as his captain.

Fiction

Animated cartoon

First Cybertronian ship in history that hasn't violently crashed upon entry into Earth's atmosphere.

The ship was first spotted as it streaked across the Detroit skyline and landed. On orders from Ultra Magnus, Sentinel Prime activated the ship's forcefield to quarantine it against the organics of Earth. However as Cybertronian technology its forcefield was no match for Sari Sumdac's AllSpark Key, which permitted the tiny organic to enter and scare the bajoobies out of Jazz. The Elite Guard

After the revelation that Detroit was host to numerous scattered AllSpark fragments, Ultra Magnus stayed on board, ready to report any "supposed" Decepticon activity directly to Cybertron Command. Optimus and Sentinel reported to Magnus about the reported Decepticon activity, which itself was a trick by the Headmaster to get Sentinel's body, though Optimus stretched the truth on his behalf. The Return of the Headmaster Soon Magnus received a report from his agent Ironhide who was stationed on the rim of the galaxy. Ironhide, while under heavy fire, informed Magnus that the Decepticons were growing bolder and attacking remote Autobot colonies and space bridges. Magnus made preparations for the ship to leave Earth. The ship's forcefields were shown not to penetrate below the ground, which allowed the cloaked Decepticons to tunnel beneath it and steal the ship's subspace transmitter. After finding out that Optimus was telling the truth about the Decepticons, the Elite Guard flew the ship back to Cybertron to defend it from the 'Cons. Mission Accomplished

On its way back to Cybertron, the Decepticon captive Starscream broke out of the vessel and headed back for Earth. Due to the theft of the transmitter, the Elite Guard were unable to contact the Autobots on Earth about it until they landed on Cybertron. A Fistful of Energon

During the Decepticon Uprisings, the Steelhaven attempted to reinforce Team Athenia but arrived too late to prevent their defeat. When the Steelhaven arrived at space bridge 687-030, the Decepticons were ordered to retreat by Megatron. TransWarped

Sentinel, Jazz, Jetfire, and Jetstorm took the Steelhaven to Earth in pursuit of the fugitive Wasp. Where Is Thy Sting? While on Earth, the Autobots began incarcerating several of Megatron's lieutenants that Sentinel had hired Lockdown to round up. The crew learned of the attack on Ultra Magnus, Five Servos of Doom and when Wasp had been dealt with, Sentinel departed Earth to head back to Cybertron. Predacons Rising Thanks to Sentinel steering the ship through an energy cloud in his haste to get home, Swindle was revived and freed the other prisoners. Lugnut led an uprising against the Elite Guard, and Sentinel was only just able to signal Optimus for help before getting captured. Optimus was sent aboard the ship and the ensuing battle spilled out into space once Lugnut poked a hole in the Steelhaven. While Lugnut was lost in space, Blitzwing, Sunstorm, and Ramjet were recaptured by Optimus and Jazz. As thanks for his help, Sentinel took the Steelhaven back to Earth to drop off Optimus before returning to Cybertron. Decepticon Air

Notes

• Derrick J. Wyatt stated that the ship kinda does look like Omega Supreme on purpose; Transformers Animated: The AllSpark Almanac II revealed the Steelhaven was really the Omega Sentinel Sigma Supreme, whose dying form was placed in stasis like Omega.
• As noted by Derrick J. Wyatt in an interview at TFcon 2009, "Steelhaven" was a name coined by fans for the ship (after the Generation 1 craft of the same name) that had been passed around on Twitter. True to form, the name was later canonized by The AllSpark Almanac.
• The layout of the Steelhaven looks similar to that of the Autobot shuttle seen in The Transformers: The Movie.