What is the flashing sequence of a fairway buoy?

• A. 1 short every 4 sec
• B. short/long every 6 sec
• C. 2 short, 1 long every 6-10 sec
• D. 9 short every 15 sec

Answer: (B)

The flashing sequence of a fairway buoy is characterized by a short flash followed by a long flash, creating a specific pattern that helps mariners identify the buoy's purpose and its location in relation to safe navigation. This sequence, known as a "short/long" flash pattern, occurs every 6 seconds, which is designed to be easily recognizable for visual navigation.

Mariners use this pattern as a navigational aid, distinguishing fairway buoys from other types, such as channel markers or harbor entrances. The consistency in the flashing interval supports safe navigation, particularly in poorer visibility conditions, allowing boaters to maintain awareness of their position and the navigable route.

The other options present sequences that relate to different types of buoys or aids to navigation, which do not apply to the specific identification of fairway buoys. Understanding these sequences is essential for safe boating practices, enabling operators to accurately interpret the signs along waterways.