In case of an emergency, what is the standard VHF frequency to report to?

The standard VHF frequency to report emergencies is 121.5 MHz, which is designated as the international distress frequency. This frequency is monitored by air traffic control and various ground stations, making it the most reliable option for pilots in distress. It is essential for communication with rescue services and other aircraft in the vicinity during an emergency situation. This frequency is widely recognized and used globally, ensuring that pilots can seek help and improve their chances of receiving timely assistance when facing critical situations.

The other frequencies listed serve different purposes. For instance, 123.3 MHz is often used for flight service stations or as an advisory frequency, while 118.6 MHz and 125.4 MHz are usually assigned to specific airport operations or air traffic control communications, not for emergencies. Therefore, 121.5 MHz is the established choice for emergency reporting in aviation.