What does the symbol in the plan view of the ILS RWY 13 procedure at DSM indicate?

The correct answer indicates the minimum sector altitude within a specified distance, in this case, 25 nautical miles. This altitude is essential for pilots as it outlines the lowest altitude that can be maintained in that sector without risking obstacles. It serves as a safety measure to ensure that aircraft are operating at a height that clears any potential obstructions in the area while also providing adequate terrain clearance.

This symbol in the plan view of the ILS RWY 13 procedure at DSM is particularly important during approaches, as it informs pilots of safe altitudes they should aim to fly at when navigating through the sector. Knowing this altitude helps pilots to remain within safe boundaries during the approach, enhancing safety and situational awareness.

Weather minimums, approach speed guidelines, and maximum safe altitude all pertain to different aspects of flight operations and procedures but do not directly relate to the indication provided by the symbol in the context of its specific function in the ILS approach procedure. Therefore, understanding the role of minimum sector altitude in the context of navigation and safety protocols is key in this scenario.