What does Rule 35 relate to?

Rule 35 pertains specifically to sound signals in restricted visibility. This rule comes into play in situations where visibility is severely limited, such as fog, rain, or darkness. It outlines the requirements for vessels to use specific sound signals to indicate their presence and intentions to other vessels, thereby enhancing safety and minimizing the risk of collisions in conditions where visual signals may not be effective.

Understanding this rule is essential for navigators, as it helps ensure that all vessels can communicate their movements and assess the presence of nearby boats, even when they cannot see one another. The use of these sound signals, such as foghorns or whistle signals, serves as a critical safety measure in maritime navigation during periods of reduced visibility.