MWAS scan type used to detect moving surface vessels in a particular area or point on the map is which?

• A. Arc
• B. Spot
• C. Sector search
• D. Rolling box

Answer: (B)

Focusing on a single point on the map to rapidly confirm the presence of a moving surface vessel is best achieved with a fixed-point, high-dwell-time scan. This approach directs the radar beam to that exact coordinate and holds it there long enough to gather a solid return if a vessel is present. The concentration of energy and the extended dwell time at that spot maximize detection speed and reliability for a known location, which is exactly what you need when monitoring a specific area or point of interest.

Other scanning patterns sweep larger areas, so the energy is spread across a broader region and the dwell time at any one location is reduced. That makes them slower for confirming a vessel at a precise point, though they’re useful for initial searches over wider areas. A method that moves a scanning window to follow movement is more about tracking than instant spot detection, so it isn’t as effective when you want quick confirmation at a particular coordinate.

So, for detecting moving surface vessels at a particular area or point on the map, a spot scan is the best choice.