What is the duration of a prolong blast?

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Study for the Maritime Navigation Rules and Vessel Responsibilities Exam. Study with multiple choice questions including hints and explanations. Prepare effectively for your exam with us!

Multiple Choice

What is the duration of a prolong blast?

Explanation:
In sound signaling under the regulations, a prolonged blast is the long signal used to communicate intent or warn other vessels. It should last four to six seconds. This duration is long enough to be clearly distinguished from a short blast (about one second) and from a rapid sequence of short blasts, making the message unmistakable at sea. The four-to-six-second length is the standard, so it’s not a quick 1–2 seconds, nor a very long 8–10 seconds.

In sound signaling under the regulations, a prolonged blast is the long signal used to communicate intent or warn other vessels. It should last four to six seconds. This duration is long enough to be clearly distinguished from a short blast (about one second) and from a rapid sequence of short blasts, making the message unmistakable at sea. The four-to-six-second length is the standard, so it’s not a quick 1–2 seconds, nor a very long 8–10 seconds.

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