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Transportation rings, also called ring transporters, transport rings or simply rings, are a form of transport used by a number of species, but they were originally designed and built by the Ancients before their invention of beam transporters.
Transportation rings are similar in function to Stargates, but only transport matter across planetary distances, either on the planet itself or to ships in orbit. When activated, a number of rings rise from the floor or drop from the ceiling, surrounding the object and converting it to energy. The matter stream is then transmitted to a similar set of rings (or the rings themselves simply move where desired) which reassemble the object. In order to prevent damage to people or objects during reassembly, the matter at the destination is swapped with the matter at the departure point.
The rings were designed by the Ancients, but are used by the Goa'uld, Tok'ra, Tau'ri, and Ori. Ori rings have a slightly different design, but are compatible with other types of rings. The Ancients themselves appear to have abandoned the use of ring transporters after Atlantis reached the Pegasus galaxy. The transporters found in Atlantis function on a similar principle, however, suggesting the technology was based on the rings. After the Ancients returned to Earth from Atlantis, they began to use beam transporters. (SG1: "Lost City, Part 2", "Avalon, Part 1", "Origin", "Beachhead")
Design and usageEdit
Transportation rings consist of several rings that levitate slightly off the ground and stack on top of each other during operation. Almost all Goa'uld transporters have five rings, except for the one installed in the gate room in the Abydos pyramid, which had nine. (Stargate)
Most Transportation rings are identical (apart from the Ori rings) and are thought to be mass-produced by the Goa'uld in staggering numbers. Each ring transporter platform weighs 12.9 tons, but it is not clear what components are included in the term "platform." Earth's Naquadah generators are capable of powering Transportation rings. (SG1: "The Other Guys")
The rings are roughly half the diameter of a Stargate and function under similar principles. The rings move to surround an object or person being transported from a holding platform, which is a cylindrical chamber, contained in either a ceiling compartment or rising up from the floor. They only transport matter from within their perimeter to the perimeter of other rings.
If a pair of rings is transporting and the rings have not yet returned to storage, energy buildup in one ring set will transfer into the paired set, resulting in the destruction of any still-active rings, as proven when the bottom ring of a ceiling-mounted set in an escape tunnel exploded when a bomb destroyed Setesh's base. (SG1: "Seth")
All matter the rings contain when they are activated is dematerialized and teleported via matter stream to another set of rings in a different location where it is then rematerialized. A unique feature of the Transportation rings is that it "swaps" matter between the two locations. If there is a person or object within the receiving set of rings, the rings simply exchange the two simultaneously. This is a safety measure to prevent transmitted matter from "fusing" with ambient matter – an occurrence that would damage inanimate objects and kill organic life even if were merely atmospheric gases in the way. It also makes possible a method of covert escape from an area – if one is under the rings as they come down, one will be transported out while an enemy happens to be transporting in. The rings, unlike Stargates, make no distinction between whole objects; matter is transported regardless of whether or not the entire object is within the confines of the rings. One of Ra's guards was killed when he was pinned head-first beneath an active set of rings. (Stargate)
A set of rings can descend a short distance from a ship hovering above a planet's surface to the ground, a technique commonly used for entering and exiting Tel'taks. When SG-1 used a Tel'tak's rings to enter an Ancient facility on Proclarush Taonas the rings physically smashed through a thin layer of solidified lava to reach their destination. (SG1: "Lost City, Part 2")
They can be activated by a ring remote worn on the arm or hand by Goa'uld and their Jaffa, or controlled by a remote panel located somewhere near a ring platform. Ring platforms are sometimes extremely well camouflaged, with the rings appearing to emerge from ordinary floors. (SG1: "The Tok'ra, Part 1", "Seth")
Storage and mobile ringsEdit
After a completed transport, the rings move back into their storage platform and deactivate. The rings themselves do not transport. Some ring platforms are portable, and can be moved when they are inactive.
Transportation rings are also sometimes used to enter and exit from spacecraft, with one set of rings inside the craft and another set of rings mounted outside the hull. This is commonly seen with the Goa'uld Tel'tak cargo ships and Al'kesh, but the Earth ship Prometheus also uses them in this way. (SG1: "Children of the Gods", "Memento")
A Tel'tak's Transportation rings was used to transport a Kull Warrior outside while it was in flight in a planet's atmosphere and once the Kull Warrior had rematerialized outside the hull, the external rings fell away from the craft along with him. (SG1: "Evolution, Part 2")
Transported matter passes between sets of rings in a matter stream that can be detected by a ship's sensors. It is possible to intercept a matter stream that is in transport by interposing a set of mobile rings (like those in a Goa'uld shuttlecraft) between the sending rings and the planned receiving rings. However, such an intercept requires that the entire matter stream be captured by the intercepting rings (i.e. the intercepting craft must be still); otherwise, the transported people will not be able to fully reintegrate and will die. (SG1: "The Devil You Know")
Ori ring transporterEdit
The Priors of the Ori apparently also use Transportation rings. The ring platform, like its Ancient counterpart, consists of five rings, however the Ori version's rings themselves are smoother, luminescent on the inside and adorned with unknown symbols. (SG1: "Line in the Sand")
During the Battle of P3Y-229, Dr. Daniel Jackson was able to beam over to an Ori warship using an Ancient Ring Transporter, indicating that the differences in the two systems are merely cosmetic. However, in order to penetrate the shields of the ship to do so, he had to use the rings while the warship was firing on the Korolev. SG-1 later tried to use the rings aboard a Ha'tak to send a bomb to destroy a warship, but while the bomb apparently arrived, it never went off. (SG1: "Flesh and Blood")
Several months later, a portable transporter was deployed on a planet that did not have one to allow military forces from an orbiting ship to be beamed onto the planet. It consists of a ring-shaped platform which is carried by an Ori fighter and simply "dropped" where desired. (SG1: "Line in the Sand")
There are also some similarities between Transportation rings and the transportation booths in Atlantis, including similar flashes of light upon transportation and swapping of the contents of the pair of devices when operated at the same time. The actual beam sound is also the same. Considering that the Ancients invented both, it is conjectured that the technologies are related. It also makes sense that the two devices are compatible allowing rings or transporters from orbiting ships to connect with Atlantis, although it has never been shown. The Ancients also invented the advanced beam transporters much later which do not require platforms.
The Asgard also have an arguably more advanced transport system than the Rings which does not require the use of the platforms. The Tau'ri call it an Asgard "beam" or "beam transporter", possibly referencing Star Trek; it was installed on both the Prometheus and on Daedalus-class battlecruisers. It requires either the use of Asgard sensors or a radio signal from the object to be transported in order to acquire a target. Thor's Hammer appears to use similar technology to transport Goa'uld and/or Jaffa to an underground trap. Unlike rings, however, Asgard transporters cannot penetrate the user's own shields nor those of friendly vessels, nor can the Asgard sensors detect the positioning signals sent out by ring platforms. (SG1: "Avalon, Part 1")
The Sodan tribe transport obelisk (Called the Eye of the Gods by the Sodan) also has a similar visual effect. These were also built by Ancients and were used by the Sodan (along with their wrist personal cloaks) to avoid Goa'uld detection and extermination for a thousand years. The obelisk is activated by typing certain symbols in a precise order. One does not have to be touching the obelisk in order to be transported as evidenced by Teal'c not touching the obelisk. (SG1: "Arthur's Mantle")
Another type of transport obelisk was built and used by the Ancient Morgan Le Fay to transport a group through an active wormhole to avoid detection while building the Sangraal. Her version had no user input required and had blue/green crystals visible on the exterior. (SG1: "The Quest, Part 2")