The Security Service of Ukraine conducted another unique special operation and staged a naval “cotton bomb” in the port of Novorossiysk. For the first time in history, a Russian class 636.3 submarine “Varshavyanka” was blown up by Sub Sea Baby underwater drones.
This was reported by the press center of the SBU, Censor.NET reports .
Special operation details
“For the first time in history, “Sub Sea Baby” underwater drones blew up a Russian class 636.3 submarine “Varshavyanka” (NATO classification – Kilo). As a result of the explosion, the submarine suffered critical damage and was, in fact, put out of action,” the report says.
On board the submarine were four launchers of Kalibr cruise missiles, which the enemy uses to strike at the territory of Ukraine.
This was a joint operation of the 13th Main Directorate of Military Counterintelligence of the SBU and the Naval Forces of Ukraine.

More about the submarine
- The cost of the Varshavyanka-class submarine is about 400 million US dollars.
- Given the international sanctions imposed, building a similar submarine could currently cost up to $500 million. This class of submarine is also known as the “Black Hole” due to the hull’s ability to absorb sound and remain invisible to sonar.
As a reminder, the blown-up boat was forced to stay in the port of Novorossiysk due to successful special operations by the “Sea Baby” surface naval drones, which displaced Russian ships and submarines from the Sevastopol Bay in temporarily occupied Crimea. Джерело: https://censor.net/ua/n3590584
(c)CENSOR.NET 2025

NATO should be begging Ukraine to join but they gave putin a veto for some reason.
Slava Ukraini!!
https://pics.filmaffinity.com/the_beatles_yellow_submarine-435533929-large.jpg
This class of submarine is also known as the “Black Hole” due to the hull’s ability to absorb
Sub Sea Baby drones……………….hahaha.
Yeah it looks like this child-killing sub was around 15 years old and one of just 3 kilo-class subs in the Black Sea. This will be another gem added to the new Black Sea underwater museum…
Not bad from a country with no cards to play. I expect someone will be tossed out of a window shortly.
Imagine being a Commander for the Naval port and having no fucking idea whatsoever if there is a drone coming from under the water with no warning. Ukraine just changed the rules of war, again.
They have given the orcs notice now. I would prefer they had sent in 10 or 20 and sunk everything.
Слава Україні! Героям слава!