While scanning, one technique is to scan in small steps of about ___ and have the slightly overlap.

While scanning, one technique is to scan in small steps of about ___ and have the slightly overlap.

• A. 5 deg
• B. 10 deg
• C. 15 deg
• D. 20 deg

Answer: (C)

Scanning effectively relies on breaking the field into overlapping sweeps so nothing slips through the gaps. A sweep width of about fifteen degrees provides a practical balance: it covers a good amount of area efficiently while still overlapping with the next sweep enough to catch objects near the edge. If you use smaller steps like five or ten degrees, you’ll spend more time scanning and fatigue can creep in, reducing overall effectiveness. If you use a larger step like twenty degrees, the gaps between sweeps become bigger and you risk missing something that sits between passes. So fifteen degrees is the best choice for maintaining continuous, reliable coverage with a reasonable pace.

Scanning effectively relies on breaking the field into overlapping sweeps so nothing slips through the gaps. A sweep width of about fifteen degrees provides a practical balance: it covers a good amount of area efficiently while still overlapping with the next sweep enough to catch objects near the edge. If you use smaller steps like five or ten degrees, you’ll spend more time scanning and fatigue can creep in, reducing overall effectiveness. If you use a larger step like twenty degrees, the gaps between sweeps become bigger and you risk missing something that sits between passes. So fifteen degrees is the best choice for maintaining continuous, reliable coverage with a reasonable pace.