Question 137Navigation General

The correct answer is D) westward of the buoy. The symbol "YBY" near a charted buoy indicates that the buoy is a special-purpose buoy, which in this case means that the buoy must be passed westward. This is in accordance with the International Association of Lighthouse Authorities (IALA) Buoyage System, which is the standard used for maritime navigation aids in the English Channel and other parts of the world. The other answer choices are incorrect because passing the buoy in any other direction (northward, eastward, or southward) would not align with the IALA Buoyage System requirements for this type of special-purpose buoy.