A ship's horn is a loud signaling device used on vessels to communicate with other ships and alert nearby boats of their presence. It is especially important in foggy or low-visibility conditions, helping to prevent collisions. The horn can produce various sounds, each with specific meanings, such as warning or signaling intentions. Typically powered by air or electricity, a ship's horn is an essential safety feature. It is often regulated by maritime laws, which dictate how and when it should be used. The sound of the horn can travel long distances over water, making it an effective means of communication at sea.