Which list includes all basic functional requirements of the RNAV and RNP specifications?

The basic functional requirements of the RNAV (Area Navigation) and RNP (Required Navigation Performance) specifications are focused on providing pilots with essential navigational information to ensure safe and accurate flight operations. Among the options presented, the most comprehensive choice accurately reflects these requirements.

The correct answer incorporates features that are crucial for effective navigation, such as continuous indication of lateral deviation and distance to the active waypoint. Continuous lateral deviation information helps pilots maintain the desired flight path, while knowing the distance to an active waypoint is fundamental for effective route management.

In contrast, other options either miss key components or lack completeness. For instance, the features that include vital aspects such as guidance systems (GS) or timing to the active waypoint and failure indications are pivotal in modern navigation systems. These elements help ensure that the aircraft is operating within specified navigation tolerances and alert the crew of any potential issues. Therefore, the encompassed requirements in the correct answer provide essential information for safe and effective navigation.