If a vessel is fitted with a fore and aft whistle with a distance of 110m between them, can both whistles be used for manoeuvring and warning signals?

The ability to use both the fore and aft whistles for maneuvering and warning signals is supported by the rules established in the International Regulations for Preventing Collisions at Sea (COLREGs). According to these regulations, a vessel fitted with both a fore and aft whistle can indeed use both whistles to provide appropriate sound signals, as long as the distance between them is suitable—here, the specified distance of 110 meters can facilitate this.

Using both whistles effectively allows for clearer communication of the vessel's intentions. For instance, in situations where the vessel needs to indicate its maneuvering intentions or warn other vessels, utilizing both whistles can ensure that the signals are heard and understood more effectively, especially in different wind directions or distances from other vessels.

Ultimately, the proper use of both whistles enhances safety at sea, allowing a vessel to indicate its actions and presence more distinctly, thereby contributing to the prevention of collisions and ensuring safer navigation in crowded or constrained waters.