He scans the horizon, this time for a human face.

The two scan the horizon for a boat or a light.

They could only guess he might be scanning the horizon.

The two men looked at each other, both turning away to scan the horizon.

All eyes scanned the horizon for signs of attack, but none came.

But mother is not here, the little girl thought, her eyes scanning the horizon.

Tom walked back to the open window and scanned the horizon for action.

Her eyes seemed to wander away from him, scanning the horizon.

He stood on the running board, scanning the horizon to the east.

Then, after scanning the horizon on all sides, he realized the truth.