The astronomers detected faint radio signals coming from a distant galaxy.

The sailors practiced using semaphore signals to send messages between ships at night.

The crew noticed several danger-signals flashing on the console and prepared to evacuate.

The starting signals were delayed by the thunderstorm, leaving the runners uncertain when to begin.

The starter signals malfunctioned just before the main event, creating confusion among the athletes.

The train driver checked the home signals before entering the platform.

The engineer relied on the cab signals to maintain safe speeds through the tunnel.

The coach taught the team several somersault signals to coordinate their routine.

Whenever he speaks about charity, he virtue signals to gain approval from his followers.

During the drought, price signals encouraged farmers to shift to drought-resistant crops.