What is true about the accessibility of marine traffic data?

The accessibility of marine traffic data significantly enhances situational awareness for mariners. This data provides real-time information about the positions, movements, and behaviors of vessels within a given marine area, allowing navigators to make informed decisions to ensure safety and efficiency while navigating. By having access to this information, mariners can better anticipate the actions of other vessels, navigate around potential hazards, and avoid collisions, making their journeys safer.

In contrast, the other options do not accurately represent the nature of marine traffic data. While some data may be updated less frequently depending on the source, it is generally not rare; it is usually updated in real time. Marine traffic data cannot be considered always accurate due to factors such as equipment malfunctions, system errors, or inaccurate reporting. Additionally, marine traffic data is continuously available and not restricted to specific seasons, allowing for year-round navigation support.