Installation 02, also known as Epsilon Halo to humanity, is one of the other seven Halo Rings. The environment is water-based with rocky outcroppings and large ice floes. In 2552, during the Battle of Installation 05, a signal was sent to this Installation from Installation 05, putting it on standby mode. A readout from Installation 05's Control Room showed that Installation 02 was fully prepared to fire on demand.