Question 528Navigation General

The correct answer is D) All of the above. Mariners are informed of defects or changes in aids to navigation through various means, including Local Notice to Mariners, marine broadcasts, and the Weekly Notice to Mariners. These sources provide up-to-date information to ensure the safety of navigation. Local Notices cover a specific geographic area, while marine broadcasts and the Weekly Notice provide information at the regional and national level, respectively. Relying on all these sources ensures mariners have comprehensive and timely knowledge of any changes or issues with navigational aids.