Nevertheless, their vision is quite sufficient to detect approaching humans or other large animals from some distance.

This large swarm was detected approaching an inhabited region of space in our galaxy.

Suddenly, another spaceship is detected approaching the station.

Initially radar was used for airspace surveillance to detect approaching hostile aircraft.

Most species of birds are able to detect approaching predators during unihemispheric slow-wave sleep.

At 22:55, a target was detected approaching Bentwaters from the east at a speed estimated around 2000-4000 mph.

Yet no such vessel was detected approaching.

If traffic lights are used they should have embedded loops to detect approaching cyclists and should give them longer green phases.

After Carter expresses concern that his victory was too easy, a second Hawk squadron is detected approaching from the opposite direction.

His keen ears had detected approaching footsteps.