Australia CASA Instrument Proficiency Practice Exam

When two navaids are available at the destination, the correct approach is to use independent systems. This means that pilots should not rely on just one navigation aid for their approach or landing, as having multiple navaids provides a layer of redundancy that enhances safety and situational awareness. Utilizing independent systems can help pilot in cross-checking and confirming positional information, which is especially crucial in adverse conditions or when navigating through complex airspace.

When each navaid operates independently, it reduces the risk of mistakes due to potential failures in one system. This redundancy is a key aspect of ensuring reliability and accuracy during critical phases of flight, like approach and landing.

The aspect of requiring an alternate is contingent on various factors such as weather conditions, not simply the presence of navaids at the destination. Only one system may be sufficient in some scenarios; however, the recommendation is to employ independent navigation aids to maintain safety. Additionally, the weather is always a critical consideration in flight planning and cannot be disregarded, as it impacts overall flight safety and navigational decisions.