What is considered "SPECIAL CIRCUMSTANCES" in maritime navigation?

In maritime navigation, "SPECIAL CIRCUMSTANCES" refers to situations that require extra caution or attentiveness from mariners. When more than two vessels are approaching, this could signify a congested area where navigation becomes more complex. The presence of multiple vessels increases the likelihood of close encounters, necessitating enhanced communication and navigation strategies to avoid collisions and ensure safety.

Navigating in a situation with several approaching vessels means that mariners must be particularly vigilant about their maneuvering, the intentions of other vessels, and any regulations that may apply to such close quarters. The awareness of multiple other vessels can also imply the need for making timely decisions and adapting to changing conditions on the water.

In contrast, situations with no vessels nearby or only a single vessel present do not entail the same level of risk and do not qualify as "SPECIAL CIRCUMSTANCES." Similarly, while an anchored vessel does present considerations, it does not raise the same immediate concerns regarding navigation safety as a group of approaching vessels does. Thus, the approach of more than two vessels is recognized as a special circumstance due to the complexities it introduces.