Which statement about B-RNAV is correct?

The correct answer emphasizes the track-keeping accuracy required for B-RNAV, which stipulates that the aircraft must maintain a certain level of precision during flight operations. Specifically, it mandates that the total system error must not exceed 5 nautical miles for 95% of the flight time. This accuracy is essential for ensuring safe navigation within the controlled airspace, especially where air traffic density is high, and precise track guidance is necessary for maintaining orderly traffic.

B-RNAV, or Basic Area Navigation, is part of a navigation specification that has defined requirements for performance and operational procedures. The requirement of maintaining a track-keeping accuracy of not more than 5 NM for 95% of the flight ensures that pilots operate the aircraft within safe limits, facilitating effective air traffic management even in complex airspace scenarios.

In contrast, other statements may not portray the complete scope or requirements of B-RNAV. For instance, it is not limited to terminal areas (TMAs), as B-RNAV can be used in various phases of flight beyond just TMAs. Likewise, while RNP1 (Required Navigation Performance 1) is relevant to certain operations, it is not a direct requirement for B-RNAV specifically. Similarly, the aspect of altitude limitations is broader than