Svenska Dagbladet (Stockholm) on October 19, 2014, reported that a distress signal in Russian preceded the submarine alarm in the archipelago of Stockholm. When the military search operation started radio communication between a transmitter in the archipelago and a transmitter in Kaliningrad was detected. This indicates that there could be a damaged russian submarine in Swedish waters. Excerpts below:
In the official version the operation started due to the reports from a “credible source” that had seen a suspicious object on October 17.
But what has not been revealed is that the National Defence Radio Establishment (“Försvarets radioanstalt”, FRA) detected radio communication in Russian a day before the operation started. It was transmitted on a special frequence, used by Russia in emergency situations.
Signal intelligence once again intercepted radio communication on October 17. This time it was encrypted but it was possible to determine the position of the transmitter and the reciever. The transmitter was situated somewhere in Kanholmsfjarden in the archipelago of Stockholm, and the reviever was in Kaliningrad, Russia.
This information has been confirmed by several persons with knowledge about the ongoing search operation, altough they can’t confirm that there is a damaged submarine in Swedish waters.