What is the minimum altitude to cross RAMKE intersection during the S-LDA RWY 6 approach at ROA?

The minimum altitude to cross the RAMKE intersection during the S-LDA RWY 6 approach at ROA is 4,300 feet MSL. This altitude is established to ensure safe clearance over any obstacles in the vicinity and to maintain appropriate separation during the approach.

In the context of precision approaches like the S-LDA (Straight-in Localizer with Vertical Guidance), crossing altitudes are critical for maintaining the correct glide path and ensuring safe operation in potentially complex airspace. The 4,300 feet MSL provides the necessary vertical clearance as the aircraft transitions through various phases of the approach, thereby enhancing safety and operational efficiency.

Choosing an altitude lower than this could result in inadequate clearance over obstacles or terrain, which is why it is crucial to adhere to published altitude restrictions during approaches. Understanding these minima ensures that pilots can operate within safe parameters, therefore improving overall flight safety.