What is the recommended evacuation signal sequence according to RVC 37021 Structure Fire Policy?

The recommended evacuation signal sequence, as outlined in the RVC 37021 Structure Fire Policy, emphasizes the need for clear and distinct communication to ensure the safety of all personnel during an emergency. The sequence of repeated short blasts for ten seconds followed by ten seconds of silence provides a recognizable and consistent alert for individuals to evacuate the area.

This approach allows for both recognition and responsiveness, as the repetitive nature of the short blasts draws attention while the silence indicates a pause for assessment or action. Using a specific time interval helps to standardize the signal, making it easier for everyone to respond appropriately, regardless of their location or the level of distraction that may be present during a critical situation.

In contrast, other options might not provide the urgency or clarity needed in an emergency, or they may not establish a clear timeframe that personnel can easily recognize and react to. Thus, the chosen answer emphasizes the importance of effective communication in evacuation protocols.