Question 69 FCP01 - First Class Pilot

The Correct Answer is B **Why option B ("yellow") is correct:** The four standard light colors used by maritime aids to navigation (such as buoys, lighthouses, and beacons) are internationally recognized to convey specific information to mariners. These four standard colors are **red, green, white, and yellow** (sometimes referred to as amber or orange-yellow, but standardized as 'yellow' for navigational aids). Yellow lights are primarily used for special purpose buoys (e.g., markers for dredging, limits of traffic separation schemes, or offshore research areas) and have distinct meaning separate from the red, green, and white channel markers. **Why the other options are incorrect:** * **A) orange:** While orange is visually similar to the standard yellow light color, the official standardized color designated by the International Association of Marine Aids to Navigation and Lighthouse Authorities (IALA) for these specific aids is **yellow**. Orange, by itself, is not one of the four principal, universally standardized colors used for primary marking light signals. * **C) blue:** Blue lights are generally reserved for very specific, localized, or private use (such as defining safe mooring areas or marking police/emergency vessels) and are not one of the four standard colors used for defining navigational channels or general hazard marking in the IALA system. * **D) purple:** Purple is not used as a standard light color for aids to navigation. It lacks the visibility and distinctiveness required for safe navigation signaling.