Astronaut Russell L. Schweickart, Apollo 9 prime crew lunar module pilot, participates in a Countdown Demonstration Test. He is wearing an Extravehicular Mobility Unit, or EMU. In addition to the spacesuit and bubble helmet, the EMU also includes a Remote Control Unit on his chest, a Portable Life-Support System backpack and an Oxygen Purge System.
NASA
Astronaut Russell L. Schweickart, Apollo 9 prime crew lunar module pilot, participates in a Countdown Demonstration Test. He is wearing an Extravehicular Mobility Unit, or EMU. In addition to the spacesuit and bubble helmet, the EMU also includes a Remote Control Unit on his chest, a Portable Life-Support System backpack and an Oxygen Purge System. This equipment was completely independent of the spacecraft during Schweickart’s spacewalk. He was secured only by a tether line.
Image Credit: NASA