Answer: The message will not emerge beyond the horizon
Explanation:
Although sound travel wide in an environment that's open and wide but they are occasions where sound is limited to move beyond a particular range, this is due to some obstacles that hinder the sound from travelling from the point of the sound to wherever it needs to go, as this obstacles limit them. The starship crew wants to send said a message to the other ships to avoid their area, the horizon they find themselves won't permit the sound to leave it shores.