Complex sentence: In the Control Center the data were displayed on boards on each side of a map of the world showing the position of the spacecraft, its ground track and the place it would land at an emergency within the next 30 minutes.
Split into simpler sentences: In the Control Center the data were displayed on boards on each side of a map of the world. The map showed the position of the spacecraft, its ground track and the place it would land at an emergency within the next 30 minutes.