What search pattern covers one end of an area first?

• A. Creeping Line
• B. Expanding Square
• C. Circular Search
• D. Grid Search

Answer: (A)

When you want to guarantee coverage starting from a boundary, the creeping line search is the pattern to use. It involves a line of searchers or sensors moving along the length of the search area, sweeping in successive passes. Each pass overlaps the last, so the area is checked from one edge inward, ensuring nothing along that edge is missed before you move deeper into the area. This edge-first progression is the hallmark of this pattern.

Expanding square starts at a point and grows outward, so it doesn’t start from an edge. Circular search concentrates on a central point and radiates outward, not favoring an edge. Grid search covers the area with intersecting lanes across the whole region, which can be thorough but isn’t focused on starting from one end.