What type of sound signal is used during distress situations?

In distress situations, the correct sound signal to use is the continuous sound of a foghorn. This signal is universally recognized as an indication that a vessel is in need of assistance. When a continuous sound is emitted, it serves as an effective means to attract attention and alert other vessels in the vicinity to the fact that help is required.

The key aspect of the continuous foghorn sound is its ability to be perceived over great distances and through various weather conditions, making it an appropriate choice for emergency signaling. This type of sound is intended to be distinct and easily identifiable, ensuring that other mariners can recognize the urgency of the situation quickly.

On the other hand, intermittent blasts followed by silence may indicate a variety of different maneuvers or situations, rather than a clear distress signal. Long and short sequences according to Morse code are typically used for communication but not specifically designated for distress signaling in the maritime context. High-pitched alarm sounds could serve various purposes but do not carry the established recognition associated with the continuous foghorn signal in emergencies.