The minimum safe altitude (MSA) for the VOR/DME or GPS-A at 7D3 is centered on which position?

The minimum safe altitude (MSA) for the VOR/DME or GPS-A approach at an airport is determined based on the location of the VOR or DME that the approach is centered around. In this case, the correct answer indicates that the MSA is centered on the WHITE CLOUD VOR/DME.

When conducting instrument approaches, MSAs are often established to ensure that aircraft remain at a safe altitude above terrain and obstacles in the vicinity of the approach navigation aid. The MSA provides a buffer that increases safety margins while navigating through potentially challenging environments, especially in areas where terrain varies significantly.

In practice, pilots interpret the MSA on approach charts to identify safe altitudes that are applicable to certain navigation aids. In this scenario, the WHITE CLOUD VOR/DME serves as the reference point, and thus the MSA is established accordingly.

Understanding the MSA's dependence on the location of the VOR/DME helps pilots in maintaining awareness of their altitude relative to the terrain as they approach the airport. This reinforces the importance of being familiar with the specifics of approach charts and the related VOR/DME data to ensure safe navigation during instrument approaches.