The Covenant also created special methane chambers for Unggoy when they are not in battle. There is a main chamber for the Unggoy to reside in and a smaller chamber in front where the Unggoy can change into and out of their suits. These structures often have posted guards and airlocks at their entrances. A number of different types of methane chamber exist: the atmosphere pit, a more temporary version, and the Methane Suite, a ship-board variant.