Which mandatory IFR reporting point indicates a missed approach?

The mandatory IFR reporting point that indicates a missed approach is identified by the letter M. This designation is crucial for pilots in Instrument Flight Rules (IFR) operations, as it provides clear communication to air traffic control (ATC) regarding the pilot’s intention when executing a missed approach procedure.

When pilots reach the missed approach point during an approach and determine that they cannot safely land, they need to communicate this to ATC. The use of 'M' as a reporting point helps ATC understand that an approach is not successful, allowing them to provide further instructions and ensure the safety and efficiency of air traffic in the area.

The other designations, while they may represent different types of reporting points or intentions, do not specifically indicate a missed approach. The unique designation of 'M' significantly aids in the clarity of communication in IFR operations, especially in busy airspace.