What is the duration of a prolonged blast?

The correct duration of a prolonged blast is indeed 4 to 6 seconds. Understanding the definition of a prolonged blast is important for effective communication, especially in situations requiring distress signals.

In maritime contexts, a prolonged blast is a sound signal that typically indicates a situation where a vessel is in distress or is warning other vessels of their presence. This signaling is vital for safety at sea, providing a standardized method for vessels to communicate critical information, particularly in low visibility conditions or emergencies.

The selection of 4 to 6 seconds as the duration aligns with the guidelines set out in the COLREGs (International Regulations for Preventing Collisions at Sea), which detail the appropriate sound signals to be used by vessels. Knowing the correct timing for such signals ensures that messages are conveyed clearly and effectively, minimizing misunderstandings between ships.

Understanding the duration and proper use of prolonged blasts is essential for mariners to uphold safety and get appropriate assistance when needed.