MWAS scan type used to survey a broad area at a selected range and bearing from the aircraft is which?

• A. Arc
• B. Spot
• C. Sector search
• D. Bar scan

Answer: (A)

The setup here is about how radar or sensor scans cover space. An arc scan keeps the range to the target area fixed at a chosen distance from the aircraft and sweeps across bearings, tracing out an arc. This pattern is ideal for surveying a broad area quickly while maintaining a constant distance from the observer, so you get wide angular coverage without moving farther or closer to the scene.

Other patterns don’t match that same combination. A bar scan moves along a straight line by changing range while keeping a bearing fixed, which is different from sweeping an arc at a constant distance. A sector search covers a wedge of bearings but typically involves varying range as it sweeps, not holding a single selected range. A spot search concentrates on a single point rather than broad angular coverage.