How long is considered a prolonged blast?

A prolonged blast on a whistle or horn is typically defined as a signal that lasts a certain duration to convey a specific message in maritime communication. A blast lasting 4-6 seconds is recognized as prolonged because it is long enough to be distinctly heard and understood, serving its purpose effectively in situations where you need to alert others, such as in low visibility conditions or during navigational challenges.

The duration of 4-6 seconds strikes an optimal balance, allowing other vessels or individuals to clearly perceive the signal while also distinguishing it from shorter blasts that may indicate different intentions or urgency levels. Understanding this duration is crucial for maintaining safety and clear communication in maritime operations. Other options fall outside the established timeframe for what constitutes a prolonged signal, either being too short to ensure clarity or falling into different signaling categories.