How long does a short blast sound signal last?

A short blast sound signal typically lasts about one second. This signal is part of the standard communication protocol used by boat operators to indicate specific maneuvers or intentions while on the water. Understanding the duration of sound signals is crucial for safety and effective communication among vessels, as it helps to convey messages in a clear and concise manner without confusion.

The other durations mentioned in the options would not accurately represent a short blast; for instance, a two-second or three-second signal could be interpreted as a medium or long blast, which serves different communication purposes in maritime contexts. Therefore, recognizing that a short blast is about one second long is important in adhering to the established rules of navigation and improving safety on the water.