What is the minimum altitude descent procedure if cleared for the S-ILS 9 approach?

The minimum altitude descent procedure when cleared for the S-ILS 9 approach involves descending and maintaining 3,000 feet to the JASER intersection. This is critical for ensuring safe vertical separation from other traffic and terrain, as it provides a consistent altitude to navigate before making the final descent towards the runway.

The procedure mandates maintaining a specific altitude until reaching the designated fix (JASER INT), which is essential to stay within the protected airspace and to allow for the transition into the glideslope interception phase of the approach. By remaining at this altitude, pilots can safely manage their descent and prepare for the subsequent steps in the approach procedure.

Understanding this altitude is vital for flight safety, as it reflects the need to adhere to published approach procedures that have been designed to mitigate risks during the transition from the enroute phase to landing. The other choices may suggest descending prematurely or not adhering to the prescribed altitudes, which could lead to potential safety issues such as altitude busts or conflicts with other aircraft.