If the ground controllers want to they can take control of the space craft at any time.

The line of advance was now clear to the British ground controllers.

There was no further communication between Flight 954 and the ground controller.

Ground controllers here in Houston said the failure would have no effect on the flight.

The ground controller on duty, who was 23 years old, was new.

On April 5, it came within 200 yards before ground controllers called off the docking.

The weather was poor and German ground controllers ordered the fighters back to base.

The ground controller allowed the workers to dry the runway during heavy rain and fell asleep on the job.

They knew they had to make the intercept without any help from a ground controller.

This can cause spacecraft to lose their orientation, which is critical if ground controllers are to maintain control.