How long is a 'prolonged blast' typically transmitted?

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Learn the Maritime Navigation Rules and Vessel Responsibilities for International and Inland Regulations. Assess your knowledge with multiple choice questions and detailed explanations. Prepare effectively for your maritime certification.

Multiple Choice

How long is a 'prolonged blast' typically transmitted?

Explanation:
In sound signaling, a prolonged blast is defined as lasting four to six seconds. This duration is longer than a short blast, making the signal clearly audible and unmistakable at distance, especially in reduced visibility or noisy conditions. The 4–6 second window provides a clear, standardized interval that distinguishes a deliberate, sustained signal from brief emissions, which helps other vessels correctly interpret the intent.

In sound signaling, a prolonged blast is defined as lasting four to six seconds. This duration is longer than a short blast, making the signal clearly audible and unmistakable at distance, especially in reduced visibility or noisy conditions. The 4–6 second window provides a clear, standardized interval that distinguishes a deliberate, sustained signal from brief emissions, which helps other vessels correctly interpret the intent.

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