At what minimum altitude should you cross RAMKE intersection during the S-LDA RWY 6 approach at ROA?

The correct minimum altitude to cross the RAMKE intersection during the S-LDA RWY 6 approach at ROA is 4,300 MSL. This altitude is specified in the approach procedures to ensure safe terrain clearance and to meet the required vertical navigation performance as the aircraft transitions from en route to the approach phase.

Crossing RAMKE at this altitude allows pilots to adequately prepare for the subsequent segments of the approach while observing standard obstacle clearance criteria. It’s important for aircraft flying this route to maintain this altitude to avoid terrain or obstacles that may infringe on the safe airspace corridor during the approach phase.

Other altitudes mentioned in the options do not meet the specified requirements for safe operations or may not comply with the published minimums for the S-LDA approach. Therefore, flying at 4,300 MSL ensures compliance with the approach procedure, prioritizing safety as the aircraft approaches its destination.