In an Expanding square search, which statement is true?

In an Expanding square search, which statement is true?

• A. Track spacing equals sweep width
• B. Track spacing is half sweep width
• C. Track spacing equals twice sweep width
• D. Track spacing is unrelated to sweep width

Answer: (A)

In an expanding square search, the distance between successive legs of the pattern, known as track spacing, is set to the sweep width. The sweep width represents the effective detection width of a pass, so when track spacing equals the sweep width, each leg just touches the previous one. This creates contiguous coverage with no gaps as the square expands outward. If the spacing were larger, gaps could be left unsearched; if it were smaller, there would be overlapping coverage but not necessary for complete coverage. That’s why having track spacing equal to the sweep width is the best choice.

In an expanding square search, the distance between successive legs of the pattern, known as track spacing, is set to the sweep width. The sweep width represents the effective detection width of a pass, so when track spacing equals the sweep width, each leg just touches the previous one. This creates contiguous coverage with no gaps as the square expands outward. If the spacing were larger, gaps could be left unsearched; if it were smaller, there would be overlapping coverage but not necessary for complete coverage. That’s why having track spacing equal to the sweep width is the best choice.