Instrument GL:6 – Holding and Instrument Approaches Practice Test

The Minimum Safe Altitude (MSA) is an important aspect of instrument flight procedures, particularly during approaches. It refers to the lowest altitude that a pilot can safely fly while still ensuring adequate terrain and obstacle clearance in a specific airspace. For the RNAV (GPS) X RWY 28L approach, the MSA is determined based on the published approach chart.

The correct choice indicates that the MSA is set at 5,800 feet MSL. This altitude ensures a safety margin above obstacles and terrain in the approach area, allowing for safe maneuvering during the approach phase of flight. The altitude is typically established based on the maximum elevation figures and any relevant obstructions within the designated sector of the approach.

Choosing the MSA, which is 5,800 feet, also reflects the necessary safety considerations and regulatory compliance for conducting an RNAV approach, where a precise approach path is defined and terrain awareness is critical to ensuring safe operations while transitioning to landing. Understanding and adhering to the MSA helps to prevent accidents related to obstacle strikes or controlled flight into terrain during the approach.