Not exactly. Jolly Roger is somewhat of an inside pun. You know how tight these First Sea Lords of the Navy can be when new technology is inserted along the lines of : If God wanted us to fly, he would have given us wings.  So, as a pun, to proof a point, the WOI deployment of subs needed some celebratory in your face, fuck you. And during WOII this became a real hit to the point that it became an unofficial hallmark of successful completion of missions, adorned with ensigns related to what happened. Sinking a merchant or military vessel, rescue, or cloak and dagger.  It is a bit akin to painting swastikas on a plane for downing a German fighter or bomber in WOII.  Jimmy Carter sub is both an attack sub + highly sophisticated cloak and dagger ship, with emphasis on deep sea missions ( see the midsection of the boat). And since the missions are highly classified, it might be considered bad taste to fly a flag signifying we have been successful on our recent cloak and dagger mission. Quite a statement.  And given the fact that commanders of highly specialized vessels, costings billions are held to a higher standard than your run of the mill truckdriver, when something out of the ordinary happens, questions follow.  Here is a brief overview what happened before in the Arctic ...thedailybeast dot com/losharik-what-was-that-secret-russian-sub-doing-before-it-caught-fire?ref=home Here is the Fisherman's source story. plug in translate, you get the gist.  m dot severpost dot ru/read/81357/?fbclid=IwAR02c3UrTeLTPIWg_J7fkzo-MKjFfFT1zcAEC6_1oSyd24mhSpGpl5-2xi8  The state of emergency with the AS-12 deep-sea nuclear station occurred on July 1 at around 9 p.m. in the Barents Sea, at the exit from the Kola Bay. A day later, the Ministry of Defense reported 14 dead sailors. They were all officers. SeverPost found fishermen who witnessed the emergency ascent of the submarine. “In the evening we walked towards Kildin, and here, at about half past nine in the evening, a submarine pops up. Right completely pops up. I have never seen such a thing in my life. On the deck, people run around, fuss, ”said the fisherman. His boat went into one of the many bays, from where he and his partners watched what was happening. They said that almost immediately a warship and two tugboats approached the boat. “We then asked the warrior what it was. They said: the boat surfaced near Ura, without stipulated reasons, then it was dragged to Kola, ”an eyewitness says. Fishermen conduct illegal fishing without permission and documents, so they did not name them. But it was reported that at about 11 pm the boat, accompanied by tugboats, quickly left. The boat was moving fast, and the men and I decided: it’s not an accident. Once under its own power and quickly goes. There was no smoke, nothing. Then we were told that someone had seen bodies being unloaded in Ur, ”a fisherman told SeverPost. A source in military circles told SeverPost that the boat that the fishermen saw was the submarine “Moscow Region”. It was on its board that the deep-sea station AS-12, which is called "Losharik," was placed. The base is in Olenaya Guba, closed-city Aleksandrovsk. In 2016, the submarine underwent a major overhaul at Zvyozdochka in Severodvinsk, and it is precisely its experts who call it the carrier of the secret deep-sea vehicle.  Note that Losharik is also a deep sea (proven 2500 meters, suspected: 6000-8000 meters) "research" vessel. You would have to wonder why it was filled up to the brim with brass .... You could be forgiven to see a parallel here.  Sometimes an accident is just that an accident. Some people in High places, have accidents because of their position, which has become problematic. Helicopter crashes were quite popular.  On the other hand, perusing USSR/ Russian Federation space events to Mars, which is also highly complex, it is larded with failure. Losharik is still USSR era technology. And granted there are some very interesting ideas behind it, but not everything is as thorough is should be. I mean, if you have to fight a fire with 14 men in close quarters with 15 minutes air reserves for 1.5 hours while 3 survived ..something does not quite add up.  Here is some interesting information, much on estimated guess, on it's built, capabilities and how it is transported to the area of operation. hisutton dot com/Spy%20Sub%20-%20Project%2010831%20Losharik.html.  Check it against deep sea cables around Norway...submarinecablemap dotcom  check this against the Jimmy Carter ....link is in the above article.  And according to ars technica: arstechnica dot com/tech-policy/2019/07/death-at-1000-fathoms-the-fire-aboard-russias-secret-sub/ "Losharik has played a role in Russia's efforts to counter US submarines' covert incursions into their northern back yards. The vessel has put down sensors to detect subs—among other things". According to Globalsecurty: 'Yet, Losharik's main mission these days is extreme depth shelf exploration for potential further mineral extraction," but there is some additional interesting views.global security dot org/military/world/russia/210.htm Check here: https://geology.com/articles/arctic-ocean-features/ And scroll down to oil ... (of course there is more) You guessed it: oil. And wait for it ... check greenland ...