What is the VHF emergency frequency monitored by most ground facilities?

The VHF emergency frequency that is monitored by most ground facilities is 121.5 MHz. This frequency is specifically designated as the international distress frequency for aviation and maritime communications. It serves as the standard emergency channel for pilots to communicate urgent situations to air traffic control and other nearby aircraft, ensuring that help can be directed immediately.

When a pilot transmits on this frequency, it is usually monitored continuously by air traffic control and various ground stations, making it an effective tool for addressing emergencies. The significance of using a dedicated frequency for distress calls is to avoid congestion on other operational frequencies, ensuring that any emergency communication can be prioritized.

The other frequencies listed may be used for various aviation communications, but they are not recognized as the primary emergency channel, which further underscores the importance of 121.5 MHz in emergency situations.