Attached to the top of his Portable Life Support System (PLSS) backpack, the OPS was worn to supply his spacesuit with oxygen in the case of a failure in the suit or PLSS or if an emergency EVA (extravehicular activity, or spacewalk) had been needed. In fact, Apollo 15 command module...
Four hours would be sent in surface operations on the first landing. The cosmonaut would exit the LK to the lunar surface. The space suit was limited to 1.5 hours on the surface at a time. The first Soviet space walk was to consist of: planting the flag; deployment of a very limited ...