It was, in effect, a radio beacon on which enemy missiles could home.
Remember to fly high and follow your radio beacon carefully.
All the while the radio beacon signal was buzzing loudly in his ears.
The strong steady draft guided them like a radio beacon, leading them to their only faint hope of escape and life.
He continued to climb, to watch his instruments, to listen to the radio beacon.
But he thought of the invaluable help this radio beacon must be to the mail pilots in the fog.
He flew on, listening carefully to the buzz of the radio beacon, and intent upon his task.
For some time Jimmy rode with only the roar of his own engine and the buzzing of the radio beacon reaching his ears.
On he flew, following the radio beacon intently, watching his time, calculating his position.