Local grid Pz67-3383 was a United Nations Space Command communications network established on the Forerunner construct, Installation 00. It was used for communication during the end of the Battle of Installation 00 between the UNSC frigate Forward Unto Dawn and a Pelican Dropship containing John-117, Cortana and Thel 'Vadam. Local grid Pz67-3383 allowed for audiovisual communication.