For RNAV approaches, which minimums should always be used?

When conducting RNAV (Area Navigation) approaches, it is essential to use LNAV (Lateral Navigation) minimums as the standard guidance for safe operation. LNAV minimums represent the minimum visibility and altitude criteria established for approaches using lateral navigation systems, ensuring that the flight crew can reliably navigate through the approach procedure. These minimums provide a defined low altitude that helps maintain safe vertical separation from terrain and obstacles in the approach area, enabling pilots to safely execute the final phases of the flight.

While standard minimums often provide general guidance for various types of operations, and visual minimums apply when the pilot can see and navigate visually to the runway or landing area, they do not specifically address the considerations necessary for RNAV approaches. Approach minimums, while somewhat related, refer to the specific altitudes and visibility criteria for an approach procedure but do not capture the unique requirements of lateral navigation systems. Therefore, using LNAV minimums ensures compliance with the specific standards necessary for safely executing RNAV procedures.