priyom.org

S11b

Enigma ID S11b
Name Cherta
Frequencies
Status Inactive
Voice Female, with Polish accent
Emission mode USB
Location Warsaw, Poland
Activity pages

S11b refers to S11a messages sent in years 2006-2009, which began and ended with "77777 77777". Such messages were sent on a randomly chosen week once a month. These groups were dropped in March 2009, but the once a month message procedure was retained.

This format first began in Morse code as M03c in August 2000, joined by the English counterpart E11b in August 2003.