How long does a short blast last?

A short blast lasts approximately 1 second. This duration is standardized in the COLREGs rules to ensure clear communication between vessels navigating in close proximity to one another. The use of blasts, whether in the context of signaling intentions, warning, or other maritime communications, needs to be consistent so that all mariners can interpret the signals accurately and respond appropriately. The duration ensures it is succinct enough to convey a message without causing confusion, thus maintaining safety on the water. A short blast is generally used to indicate an intention to change direction or for other similar nautical communications, making its brief duration essential to effective communication.