What does 122.1R signify on VNC over a VOR?

The indication of 122.1R on a VNC (VFR Navigation Chart) serves a specific purpose within aviation communications. This designation signifies that the frequency of 122.1 MHz is associated with a Flight Service Station (FSS) that operates on a receive-only basis. In this context, pilots can communicate with the FSS by using other frequencies to transmit but must use this designated frequency to receive information about weather, flight advisories, and other essential services.

Understanding the function of the FSS and its communication methods is crucial for ensuring that pilots are using the appropriate frequencies for effective coordination and safety while flying in the vicinity of VORs. This frequency’s significance as a receive-only channel enhances situational awareness for pilots, allowing them to gather vital information without needing to note transmission capabilities over that specific frequency.