What is the definition of "swing circle"?

The concept of the "swing circle" is tied to the behavior of a vessel at anchor. It refers specifically to the area around the vessel while at anchor, which is determined by the length of the anchor line and the vessel's overall length. When a vessel swings on its anchor due to wind or current, its swing circle is essentially the radius traced out by the vessel's pivot point at the anchor.

The distance from the anchor to the GPS antenna is not related to how the vessel behaves when anchored; instead, it pertains to a specific measurement that does not define the entire area around the vessel. Understanding the swing circle is crucial for safe anchoring, as it helps to avoid collisions with nearby vessels or hazards, ensuring sufficient room for the vessel to swing without interference.