What frequency should you tune into for military intercept procedures?

The frequency 121.5 MHz is universally recognized as the emergency frequency for aircraft. It serves as the primary emergency frequency for aviation and is monitored by air traffic control stations, military units, and international search and rescue operations. When dealing with intercept procedures, it is crucial for military pilots to be able to communicate with air traffic control and potentially distressed aircraft. Tuning into 121.5 ensures that the aircraft can send out distress signals and receive assistance if necessary, making it the appropriate choice for intercept procedures.

Other frequencies mentioned serve different purposes: 123.45 MHz is commonly used for non-towered airport communications, 128.85 MHz is typically used for ATIS (Automatic Terminal Information Service) in some regions, and 118.0 MHz is often used for standard communications with air traffic control. These frequencies do not play a role in military intercept scenarios, which is why they are not suitable alternatives to 121.5 MHz.