What does the term 'short blast' mean?

The term 'short blast' refers to a sound signal that is typically characterized by its duration. In maritime communication, especially under the International Regulations for Preventing Collisions at Sea (COLREGs), a short blast is defined as a sound lasting between 1 to 2 seconds. This duration is critical for ensuring that signals are clearly understood and can convey the appropriate information in navigational contexts. Short blasts are used for signaling intentions, such as when a vessel is maneuvering or communicating with other vessels nearby. The established time frame ensures that all vessels can interpret the signals uniformly, enhancing safety and facilitating effective communication on the water. This understanding is crucial for officers of the watch when operating in busy maritime environments.