Emission mode: Unknown
Believed Country of Origin: Unknown
M55 rarely broadcasted but always sent null messages. All transmissions are about 10 minutes long and sent 5 3-Figure groups and then “000 000” ex. 599 599 599 000 000. Used to send on Tue & Fri at 1300z on 12150kHz and also before 2004 on Tue & Thu on 9254Khz at 2200z.