The enormous Macross Frontier Colony Fleet consists of the N.U.N.S.Battle 25 attached to the front of the massive Island 1 city ship, which is some 15 kilometers long (much larger than City 7 from Macross 7, which was some 6 kilometers in length).
Nearly half of the 10 million residents of the Macross Frontier fleet reside in Island 1 under a dome some 2,000 meters in altitude. The ground levels feature metro areas, hills, rivers, and oceans. Sky city is located on the ceiling of the dome while there are several levels underground with residential zones and storage space, gravity generators, propulsion systems, and so on. The shell remains up normally but is closed during battles and space folds.
A large cluster of other, smaller domed Islands are also attached directly to the Macross Frontier in two large chains trailing behind the Island 1.
Island 3 is noted to contain an agricultural area, the Zentradi mall Folmo and an alien lifeform research laboratory.
In times of crisis, the individual Islands have defensive shutters that envelope the dome to protect those inside.
