Which of the following is true regarding the danger signal?

The danger signal is crucial for ensuring communication between vessels, especially in situations where safety is at risk. In this context, the statement that vessels must be in sight of each other to use the danger signal is accurate because these signals are primarily intended for situations where visual confirmation is possible. This ensures that both vessels understand the intention behind the signal, reducing the likelihood of miscommunication and enhancing safety on the water.

This rule supports effective navigation and safety practices, as the danger signal is designed to alert other vessels to potential hazards. When vessels are in sight of one another, they can respond appropriately to the signal, whether it involves altering course, slowing down, or taking other necessary actions to avoid collisions or other dangerous situations.

Understanding this aspect of the danger signal allows vessel operators to operate more safely and to effectively communicate warnings to others on the water, reinforcing the importance of visibility in maritime navigation.