How often must sound signals be made by a vessel in distress?

When a vessel is in distress, it is important to use sound signals as a means of attracting attention and signaling for assistance. The standard practice under the rules of international navigation, known as the COLREGs (International Regulations for Preventing Collisions at Sea), specifies that sound signals should be made every two minutes. This frequency is paramount because it allows nearby vessels and rescuers to remain alert to the distress situation without causing unnecessary noise that might lead to confusion.

Making sound signals at this interval ensures a balance between effectively communicating the need for help and maintaining a manageable level of auditory signals in the marine environment. This regulation is based on the need for timely and repeated alerts that can prevent further incidents or aid in a faster rescue operation. Sound signals can include the use of a whistle, horn, or any other audible device that can be heard from a distance.