At what point should a pilot execute the missed approach for the LNAV approach at LBF?

The missed approach point (MAP) for an LNAV approach is defined by the specific waypoint designated in the approach procedure. In the case of the LNAV approach at LBF, the pilot should execute the missed approach when reaching the RWY 30 waypoint. This waypoint is critical because it indicates the position at which the pilot must assess the situation and determine if a missed approach is necessary due to insufficient visual references or any other factors that would prevent a successful landing.

Additionally, the procedure for LNAV approaches relies on accurately following the published lateral navigation paths. Reaching the identified waypoint allows the pilot to adhere to the prescribed missed approach procedures outlined in the approach chart. Hence, confirming the execution at this waypoint aligns with the specific guidance and ensures compliance with aviation regulations and best practices.

The other potential points, while relevant in different contexts, do not align with the defined procedure for executing the missed approach in this scenario. For instance, the MAP is not a generalized altitude or distance from the runway but rather a specific navigational reference.