When the glide slope fails during the approach to DSM and cleared for the LOC RWY 13, what altitude minimum applies?

When the glide slope fails during an approach, and you're cleared for the Localizer (LOC) approach to runway 13 at DSM (Des Moines International Airport), the Minimum Descent Altitude (MDA) for the LOC approach becomes crucial.

In this scenario, the correct altitude minimum of 1,380 feet MSL reflects the published minimum for the LOC approach without the glide slope assistance. The LOC approach allows a pilot to maintain lateral guidance aligned with the runway, but without the vertical guidance provided by the glide slope, the pilot must rely on the MDA to ensure a safe approach and landing.

This specific altitude of 1,380 feet is determined by the approach plates published for the LOC RWY 13, which detail the minimums for different conditions, including when the glide slope is inoperative. Following the procedures set by the FAA and ensuring adherence to the specified altitudes is critical for maintaining safety during an instrument approach.

In contrast, the other altitude options do not correspond to the MDA for the LOC approach, either being too high for the stage of the approach or not being applicable minimums for the specific runway approach in question. It’s essential for pilots to refer to the appropriate approach plates to fully understand the recommended alt