Standard issue Mjolnir armor Designed for the vacuum of space, EVAs are widely used, from repairing ships, to combat EVA Armor: Pressurized Suits are a necessity during an EVA operations due to the vacuum of space. In addition, Thruster pack are needed for maneuvering when not tethered to a spacecraft. Combat EVAs pose a significantly greater risk to those performing it, due to the chance of suit decompression in the vacuum if hit by bullets, shrapnel, etc. Civilian welders and technicians perform EVAs in order to repair ships, such as that performed upon the UNSC Gettysburg in the Eridanus system. The UNSC also employs specialized EVA Engineers on their warships such as the UNSC Spirit of Fire. Specialized zero-G vehicles are also used to perform EVA, such as the Open Frame 92/Extra-Vehicular Activity.