What does the presence of seasonal buoys signify to mariners?

The presence of seasonal buoys is indicative of temporary conditions that are specifically related to the seasons. These buoys are employed by mariners to provide timely navigational information reflecting changes in the waterway that occur at particular times of the year, such as variations in current, water levels, or navigable channels that may be affected by seasonal elements.

Mariners rely on these seasonal buoys to adapt their navigation strategies according to the prevailing conditions that might not be present throughout the entire year. This can include marking areas that may become hazardous or inaccessible during certain seasons due to factors like ice formation, changing tides, or flora and fauna migrations. Therefore, understanding that these buoys denote conditions that are not permanent helps mariners make informed decisions for safer navigation during different times of the year.