For my reception of a DSC message I received this beautiful QSL for Iqaluit Coast Guard Radio on 12577 kHz. I sent my report to: IQANORDREG@innav.gc.ca .
The duty officer apologized for taking so long to reply (about 5 months) but they had a very busy season. Of course that’s no problem at all and I’m grateful for the service they provide to us listeners. They also wrote that they enjoy receiving letters from all around the world!
As far as I know all DSC communications on shortwave (4 MHz and higher) are coordinated via Iqaluit, the capital of Nunavut in Canada. The station in Prince Rupert seems to be the only exception to the rule. I’m not sure what the status of the Canadian mediumwave Coast Guard stations is these days. In the 80-ies and 90-ies I could regularly hear them in SSB on 2182 kHz. But I don’t see any of them listed with DSC. So my guess is that, like their counterparts in the USA, distress calls are no longer monitored on medium wave.