What is a key reason for boarding officers to be familiar with navigational rules?

Boarding officers need to be familiar with navigational rules primarily to ensure safe navigation and avoid collisions at sea. Understanding these rules allows officers to assess whether vessels are operating in compliance with established maritime regulations, which is crucial for maintaining safety on the water. By knowing the rules, boarding officers can identify potential hazards and enforce regulations that enhance navigational safety, thus preventing incidents that could lead to accidents, injuries, or loss of life.

While educating the public about maritime laws, assisting in commercial shipping routes, and monitoring fishing activities are important roles, they do not directly address the primary responsibility of ensuring safe navigation on the waterways. Familiarity with navigational rules is fundamental for boarding officers as they work to enforce compliance and promote safety, ultimately protecting both maritime personnel and the environment.