This would leave an innocuous record in the automatic signal logging system.

As they approached the exit it swung up in response to some automatic signal.

But, having sent off its automatic signal, the ship lay dead in space.

And we got no idea which way she went, or why her ground car isn't broadcasting an automatic positional signal.

The top light has the same meaning as that of an automatic signal.

If it ran out of gas, the car would transmit an automatic signal.

Borth must have caught an automatic signal from the moving floor.

At such times, warned by an automatic signal from the opening door, she was to take her place in the tomb.

However he had no control over automatic signals, and was not able to stop the fourth train.

Despite the automatic signal from the Enterprise computer, very little extra energy was fed to the shields at the impact point.