From Halopedia, the Halo wiki
Odin's Eye acts as a Faraday cage, preventing any electronic signal from getting in or out, making the room one of the most secure places in the galaxy. The Cage has been described as circular with a round, black conference table in the center. To enter the Cage, a bio-scanner confirms one's identity and, upon confirmation, opens the entrance. There is no visible door to enter Odin's Eye; Kurt Ambrose once noted that there was no crease where the two halves of the door met.
The SPARTAN-III program
Odin's Eye held several significant meetings throughout its history; of which three involved the SPARTAN-III program. The meeting creation of the Spartan-IIIs involved several high ranking officers: Vice Admiral Margaret Parangosky, Rear Admiral Ned Rich, Captain Aaron G. Gibson, and Colonel James Ackerson. This group of officers decided to then "trade lives for time" by creating the relatively cheaper Spartan-IIIs compared to the SPARTAN-IIs. Between the years of 2531 through 2552,[note 1] Odin's Eye held more meetings between the heads of the SPARTAN-III program which then included LCDR Kurt Ambrose. These meetings included discussions of the successes of Alpha Company and the formation of Beta Company.
List of appearances