The Zeta-Shield blocks Zeta-Beam traffic. If used on a global scale, it means interplanetary transport is blocked. Transport within the shielded area remains possible.[1]
The shield does not stop space craft or boom tubes.[2]
At the Erdel Initiative in STAR Labs' Taos facility, Zeta Squad returned from their expedition to Rann and reported to Captain Atom, Nightwing, Wonder Woman and John Stewart about the mission, including the Zeta-Shield technology specifications they brought back. Adam Strange assured Captain Atom that Justice League's Zeta-Tubes would be unaffected as the shield would operate above the Watchtower's orbit.[1]
At the Erdel Initiative, Adam Strange and Eduardo Dorado Sr. were making the final preparations for the Zeta-Shield. Strange contacted the Watchtower, telling the League that the shield satellites wre in place.[2]
