The correct answer is that the horizontal field of vision should extend to at least 60 degrees to each side from the bridge. This requirement is grounded in maritime safety regulations and is designed to ensure that navigators have a sufficiently wide field of view to effectively monitor their surroundings for navigational hazards, other vessels, and obstructions.
A horizontal field of vision of 60 degrees to each side provides navigators with a comprehensive perspective, enabling them to react promptly to changing conditions and potential threats. This capability is crucial, especially in busy shipping lanes or crowded ports, where the ability to detect other vessels and hazards can prevent accidents and ensure safe navigation.
This standard emphasizes the importance of visibility in maritime operations, considering both day and nighttime conditions. While it’s beneficial for a vessel’s bridge to have an even wider field of vision, the regulatory minimum is established at 60 degrees to maintain effective situational awareness and enhance safety on the water.