UHF. 3 stations listed.
| Station | Country | Location | Power (kW) | Schedule (UTC) | Language |
|---|---|---|---|---|---|
| Bluebird 01 Mode U - Transmitter - Downlink | International | — | — | — | — |
| Bluebird 06 Mode U - Unconfirmed Transmitter 6 - Downlink | International | — | — | — | — |
| Bluebird 08 Mode U - FSK 2400 - Downlink | United States | — | — | — | — |