Compare surface radar and air search radar in terms of capabilities and typical uses.

• A. Surface radar tracks ships and coastlines with clutter; air search radar detects aerial contacts at longer ranges and higher altitudes; each has distinct clutter and performance characteristics.
• B. Surface radar detects only land formations; air search radar only detects weather patterns.
• C. Surface radar is faster than air search radar; air search radar operates exclusively at sea level.
• D. Surface radar ignores metallic targets; air search radar ignores non-metallic.

Answer: (A)

Two radar systems are optimized for different targets and clutter environments. Surface radar is tuned to track ships and coastlines, so it focuses on resolving objects at or near the sea surface and must cope with clutter from the water and nearby land. Air search radar is designed to detect airborne contacts at longer ranges and higher altitudes, where the clutter environment and signal conditions differ and where long-range detection and volume scanning are prioritized. Because of these distinct target sets and clutter characteristics, each system exhibits different performance—surface radar emphasizes accurate bearing and range to surface contacts with surface clutter in mind, while air search radar emphasizes long-range detection of aircraft and higher-altitude targets. That combination—surface radar for ships and coastlines with surface clutter, and air search radar for long-range aerial detections at altitude—best matches how these systems are used. The other statements misstate capabilities (for example, surface radar does not detect only land, air search radar is not limited to weather patterns, and both systems are used for detecting metallic targets, not ignoring them), so they don’t fit the described roles.