Lowering the altitude selection in OP menu #2 ACQ MODE (RPM)/ ANT DIR provides how many degrees of elevation search coverage?

When you lower the altitude selection in the Operational Menu #2 Acquisition Mode (RPM) or Antenna Direction, you are adjusting the radar system's search coverage. The correct answer indicates that lowering the altitude provides 5 degrees of elevation search coverage.

This adjustment is significant because it determines the vertical extent of the radar’s search capabilities. A 5-degree angle means that the radar system can effectively scan a relatively narrow vertical slice of airspace, which can be essential for precise tracking and targeting of aerial threats. Such fine control over the elevation search enhances the system's ability to detect low-flying objects or those operating at specific altitudes, thus improving overall operational effectiveness in air defense scenarios.

Understanding this parameter is crucial for operators as it influences how the radar interacts with the intended aerial targets while managing the resources and capabilities of the air defense system effectively.