Ancient control chair
Powered by an entire Zero Point Module, control chairs are chiefly responsible for defense, launching Ancient drone weapons from storage portals. They are also capable of displaying various charts, cross-referencing the desired chart from the user's mind with the file stored in the chair's computer. Control chairs are also believed to be able to network with Puddle Jumpers, allowing the user in the chair to remotely pilot them for kamikaze missions and the like.
The device is not simple to operate. In fact, it requires a considerable amount of concentration for some who possess the Ancient gene. For others, using the unit is intuitive. Those with Dr. Carson Beckett's Ancient gene therapy can also operate the technology.
In the Milky Way Galaxy, control chairs have been found at Taonas on Proclarush and Atlantus outpost on Earth. For the Pegasus Galaxy, a chair is based in a tower of Atlantis, but many likely lie at other outposts there. Other Ancient outposts, such as the one on the Dorandan homeworld, do not appear to have control chairs.
Lost City, Part 2 - O'Neill uses the Ancient control chair at Atlantus outpost to annihilate Anubis's forces in orbit.
Rising, Part 1 - Sheppard rests in Atlantus's Ancient control chair and activates it, forcing Weir to petition O'Neill that he join Atlantis expedition as he is the sole natural they have found in the personnel.
The Siege, Part 1 - Drs. McKay and Beckett find Sheppard's availability is limited and petition Dr. Kusanagi to sit in the chair and be their guinea pig.
The Siege, Part 2 - Sheppard uses the control chair to mount an additional assault on incoming Wraith darts, until the chair depletes Atlantis's inventory of drones.
The Tower - Sheppard encounters a ruler who uses an Ancient control chair to fire drones on the Wraith -- and any citizen below -- who wish to question his authority.
First Strike - In order to escape the Asuran satellite attacking Atlantis Sheppard uses the control chair to first submerge the city then launch it into space.
Lifeline - At the end of a long space journey Sheppard uses the chair to land the city on a new planet.
Vegas - In an alternate reality, Dr. McKay shows Sheppard the control chair and explains to him how it works. Later a Wraith sends a sub-space and sub-dimensional signal to other Wraith regarding the position of Earth and it's control chair.
Enemy At The Gate - In a pre-emptive attack Wraith darts destroy the Antarctic control chair which was recently relocated to Area 51, and clearing the way for a Wraith super hive to attack a defenseless Earth.