working and maneuvering around in space is very difficult due to the lack of gravity, so practicing without it is very important. We suspend you horizontally in a harness so that your feet and body are immobilized while your head, arms, and hands still have complete range of motion. We suspend you 2-3 feet off the ground inside a cylindrical tank that is lined with grab bars and a tethering rail.
while you are suspended inside the tank there is always a slight positive pull against you, away from the wall. If at any time you let go of the wall while you are untethered, you will float away from the wall. Practice communications while you work through repair projects located every few feet.