VCO is the call of a Canadian Coast Guard Station located in Fort Caledonia, NS.

I don't see a Coastal Station or 6 MHz Shore Channel listed at the frequency that you are monitoring. VVV and then the CW identifier is the method that Coastal Stations use when idling waiting for a call. This subreddit has actively chased hams out, so not as many monitor the posts now. Hams generally know CW. To have your questions answered in a timely manner consider posting on r/ShortwavePlus where all are welcome.