Which statement best describes Major ATON structures?

• A. Are simple as wooden posts with no engineering
• B. Are complex in design and construction and usually require significant engineering effort, including geotechnical and hydrographic site analysis
• C. Are always unlit
• D. Are always on water lines

Answer: (B)

Major ATON structures are built to be robust and reliable in demanding marine environments. Their design involves significant engineering because they must withstand waves, wind, ice, and currents over long lifetimes. Before construction, geotechnical analysis determines the soil conditions and bearing capacity where the foundation will sit, guiding whether piles, caissons, or gravity foundations are used. Hydrographic site analysis maps water depths, tides, currents, seabed features, and sediment movement to ensure proper placement, scour protection, and safe installation. This combination of soil and water analysis, plus the structural design, makes these structures complex and engineering-intensive. They are often lit and may include fog signals and other aids, and they can be located on land, on rocky shores, or offshore—so they aren’t simply simple posts or restricted to a single location like water lines.