Reaction Control Thrusters
From OCE Space Simulation
The Reaction Control Thrusters better known as RCS thrusters are small thrusters located on all sides of the Habitat and Ayse. These thrusters are used for very fine adjustment of movement in space as well as turning. The RCS Thrusters in the Orbit software uses a variation of a Vernier Thruster.
How They Work
The RCS Thrusters use compressed gas which comes from the byproducts of the fusion reactions in the Reactor. The gas is then compressed in a storage tank until it is needed. The RCS gas tanks hold enough gas for ~106 uses without being charged.