Atmosphere pits are Covenant structures filled with methane. Typically deployed on Covenant bases or military camps in the field, they are designed to allow Unggoy to have a space to live without being hooked up to their methane tanks. Essentially similar in purpose to the starship-based methane suite, atmosphere pits come in different shapes and types, including a dome-shaped tent made from a flimsy white material, allowing the pit to be easily erected and collapsed in the field, and a cylindrical, tank-like structure. They are equipped with airlocks to keep the methane inside.
List of appearances