EVA

Extra-vehicular activity (EVA) is any activity done by an astronaut outside of a spacecraft beyond the confines of an atmosphere. The term most commonly applies to a spacewalk made outside a spacecraft in space, but it can also apply to surface exploration on objects without an atmosphere.

EVAs may be either tethered (the astronaut is connected to the spacecraft; atmospheric gases and electrical power can be supplied through an umbilical cable; no propulsion is needed to return to the spacecraft), or untethered. Untethered spacewalks are the ones most commonly used, with the EVA suit essentially being a one-being spacecraft, with some models even capable of going Faster than light.

Technically, all Battle Suits are EVA Capable. There are additional models of EVA Suits that are designed for construction and repair work, and some speciallized models for use by exploration teams.

"Going EVA without a suit" is an expression that means going into a situation completely unprepared. It can also refer to a method of execution on spacecraft in transit where the condemed individual is expeled from an airdock without an EVA Suit.