What altitude minimum applies when cleared for LOC RWY 13 after glide slope failure at DSM?

When a flight is cleared for an approach to an airport using a Localizer (LOC) approach, the altitude minimum also depends on whether or not the glide slope is operational. In the case of a glide slope failure, the pilot must revert to the minimum altitude specified for the localizer approach, as the glide slope component is not functional.

For the LOC approach to Runway 13 at Des Moines International Airport (DSM), the appropriate altitude minimum that must be adhered to is typically defined in the approach procedure charts. When the glide slope is not available, the minimum safe altitude can often be found in the approach plates, which would be 1,380 feet in this scenario.

This minimum altitude ensures that the aircraft remains clear of terrain and obstacles in the final approach segment, thereby establishing a safe altitude for continued approach when glide slope information is not present. The other altitudes provided in the options would not be correct for this specific situation, as they do not align with the specific localizer approach requirements for DSM under glide slope failure conditions.