Does the duration of sound signals during fog maneuvers have a specific guideline?

The notion that there are specific guidelines regarding the duration of sound signals during fog maneuvers is inaccurate, making the statement false. The International Regulations for Preventing Collisions at Sea (COLREGs) do provide general rules regarding the use of sound signals in restricted visibility; however, they do not prescribe a set duration for these signals.

Instead, the regulations emphasize that vessels must use sound signals in addition to maintaining a proper lookout and making safe speed decisions. When navigating in fog, it's crucial for vessels to communicate their presence to others, but the specifics of signal duration can vary based on the situation and are not explicitly defined in maritime regulations. This flexibility allows mariners to employ best practices suited to their specific circumstances while still adhering to safety protocols. Therefore, the answer that asserts there are strict guidelines regarding duration is indeed false.