What is the meaning of one prolonged blast at intervals of not more than two minutes?

One prolonged blast at intervals of not more than two minutes serves the specific purpose of communicating a signal from power-driven vessels that are underway. This sound signal is crucial for navigational safety, as it informs other boats in the area about the presence and movement of the vessel, particularly in situations where visibility may be compromised, such as fog or heavy rain.

Using this signaling method helps to prevent collisions by alerting other boaters to the power-driven vessel's position and intentions. Furthermore, it adheres to the requirements outlined in the International Regulations for Preventing Collisions at Sea (COLREGs), which govern maritime navigation and help ensure safe practices among vessels.

Understanding this signal is an essential part of boating safety education, as it contributes to effective communication on the water and fosters a safer boating environment for everyone.