What pattern is used to search a small area when some doubt exists about the distress position?

• A. Expanding Square
• B. Circular
• C. Sector
• D. Grid

Answer: (A)

Expanding square search targets a small area around the last known point and then widens the coverage in a square spiral. This pattern is ideal when you have some doubt about the distress position: you concentrate initial effort near where the subject was last seen or where last known data places them, and you methodically expand outward to increase the search radius if the target isn’t found. The square-spiral approach keeps coverage organized and minimizes gaps close to the origin, which is where the target is most likely to be if uncertainty is present.

A circular pattern is chosen when you have a known distance from the last point and want to cover all directions at that radius. A sector pattern is used when there’s directional information or bias to search along a particular bearing. A grid is better for large areas with little precise information, providing uniform coverage over a broad region.