What duration characterizes a short blast?

A short blast is characterized by a duration of about one second. In marine navigation, the use of sound signals, such as blasts on a horn or whistle, is essential for communicating the intentions of vessels and ensuring safety on the water. A short blast of one second serves a specific purpose in signaling, helping to avoid collisions and providing clear communication between boats.

The other durations mentioned, such as 4-6 seconds, less than half a second, and 1-3 seconds, refer to different types of sound signals. For instance, longer blasts or specific signaling patterns define other communication standards that are not aligned with the established definition of a short blast. This distinction is crucial for boat operators to understand so they can communicate effectively while navigating shared waterways.