Radius SURPIC is defined by

Radius SURPIC is defined by

• A. A radius from the distress position
• B. A rectangle defined by NW and SE corners
• C. A line from the distress position to the nearest vessel
• D. A fixed time window from the distress event

Answer: (A)

Radius around the distress position is used because SURPIC treats the distress location as the anchor for the search area. As time passes, a survivor’s possible location expands in all directions due to wind and currents, so a circular boundary centered on where the distress was reported best captures the range of places the person could be. This symmetric, center-based approach makes it straightforward to model uncertainty and plan searches in all directions from the last known point. The other options don’t fit: a rectangle would fixate on a box that isn’t tied to the actual distress point, a line to the nearest vessel describes a path rather than an area to search, and a fixed time window focuses on duration rather than where to search.

Radius around the distress position is used because SURPIC treats the distress location as the anchor for the search area. As time passes, a survivor’s possible location expands in all directions due to wind and currents, so a circular boundary centered on where the distress was reported best captures the range of places the person could be. This symmetric, center-based approach makes it straightforward to model uncertainty and plan searches in all directions from the last known point. The other options don’t fit: a rectangle would fixate on a box that isn’t tied to the actual distress point, a line to the nearest vessel describes a path rather than an area to search, and a fixed time window focuses on duration rather than where to search.