Which frequency does the URT-33C/M beacon broadcast on?

The URT-33C/M beacon broadcasts on 243.0 MHz, which is specifically designated for aircraft emergency locator transmitters. This frequency is primarily used for military purposes and communicates with military search and rescue forces. It serves as a distress frequency: when activated, the beacon emits a signal that can be picked up by various receiver systems, allowing for the location of an aircraft in distress.

The 121.5 MHz frequency, while also used for emergency purposes, has been largely superseded by newer technologies and is not the frequency used by the URT-33C/M. The 406.0 MHz is related to newer emergency locator transmitters, which provide enhanced features over older systems, and the 455.0 MHz frequency is typically associated with other types of military communications, rather than emergency locator beacons like the URT-33C/M. Thus, the choice of 243.0 MHz reflects the correct operational use of the URT-33C/M beacon.