As far as I can tell, Russia is mainly using these "shadow" ships for smuggling, to evade sanctions, or just to make it harder to monitor what's going in and out of their territory. This particular ship was already seized previously for similar reasons. Using them for launching air attacks against NATO nations would be a major line to cross that I doubt they want to cross.
External Quote:
The Boracay, also known as Pushpa and Kiwala, is a Benin-flagged vessel but has been listed under UK and EU sanctions against Russia.
It was detained by Estonian authorities earlier this year for sailing without a valid country flag.
It had set off from the Russian port of Primorsk outside Saint Petersburg on 20 September and sailed through the Baltic Sea and past Denmark, before entering the North Sea and carrying on through the English Channel.
It had been scheduled to arrive in Vadinar in north-western India on 20 October, according to data from the Marine Traffic tracking website. However it was followed by a French warship after it rounded the Brittany coast and then altered course and headed east towards the French coast.
Source:
https://www.bbc.com/news/articles/cx2j1gynjddo
The suspicion seems to be based on it being a smuggling ship used by Russia, and it being relatively nearby around the time of the CPH shutdown. But all ships departing from Russian Baltic Sea coasts must pass close by Denmark, it is unavoidable. (edit:
@Mendel beat me to it) I'm having trouble locating a past track for the ship but this article says it was ~50 nautical miles south of Copenhagen on 22 Sep.
External Quote:
Prior to sailing toward France, the Boracay, was approximately 50 nautical miles (90 km) south of Copenhagen on September 22 when drone activity forced the closure of the city's airport around 1830 GMT, according to data from MarineTraffic.
https://gcaptain.com/sanctioned-tanker-captain-arrested-in-france-as-danish-drone-mystery-deepens/
50 nautical miles south of Copenhagen is the passageway on the way to the Great Belt channel large cargo ships must take to leave the Baltic Sea to the North Sea and onwards to the Atlantic. I haven't seen anything claiming it deviated from a standard path for these cargo ships.
View attachment 84670
(background image is just the latest grab from
https://www.marinetraffic.com/en/ais/home/centerx:13.1/centery:55.8/zoom:7)
At least the military was flying with ADS-B on this time. Last week they were apparently flying all over the country with no location broadcasting on, since it was confirmed they had flown in particular areas in particular time windows, yet nothing showed up on ADSB Exchange.