She still hadn't figured out the purpose of most of the horn signals.

Finally, a set of horn signals echoed through the afternoon, and the outriders urged their mounts forward.

They are accompanied by an audible in-cab horn signal.

The second set of horn signals bugled across the field.

At the time of the horn signal, the ferry had already turned to port, beginning to cross the river, and was less than a quarter-mile away.

Auletta apparently never sighted the Frosta, nor did he hear the radio calls or horn signals.

Some time in the afternoon, they heard several horn signals far behind, but they did not know what it meant.

A great yell from before them; more horn signals.

Over the pounding blood in her ears, Paks heard horn signals and the clamor of combat.

Then a horn signal floated across the air, and she froze.