WordNet
Usage examples of "warning signal".
But before Hunter was able to wrestle the big plane back down to two hundred feet, the B-l's radar warning signal began to howl both in the sub's command center and in the airplane cockpit.
He was just reaching for another pill when a light blinked from the people up on the flight deck- there was nothing much to do while in orbit and a warning signal was a rarity.
Shuddering under extreme deceleration, the thinking-machine fleet would arrive not long after the warning signal reached the capital world.