During ascent, immediately after separation from the Descent Module, this module temporarily enters a pre-programmed "auto-pilot" routine, which places it into a stable orbit. The LK Lander Core has this same feature.
- When maneuvering by itself in the launch stage, it can gain tremendous speeds using the main engine. This is likely because this engine is needed to counteract the planet's/moon's gravity
- This part can take pictures, and was used to do so in Mission 11