this post was submitted on 15 Dec 2025
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SSU hit a Russian submarine in Novorossiysk

The Security Service of Ukraine conducted another unique special operation and arranged maritime "bavovna" in the port of Novorossiysk. For the first time in history, "Sub Sea Baby" underwater drones blew up a Russian Project 636.3 "Varshavyanka" class submarine (NATO classification — Kilo). As a result of the explosion, the submarine sustained critical damage and is, in effect, disabled.

On board the submarine were four cruise missile launchers for "Kalibr" missiles, which the enemy uses for strikes on the territory of Ukraine.

This was a joint operation of the 13th Main Directorate of Military Counterintelligence of the SSU and the Navy.

The cost of a "Varshavyanka" class submarine is about 400 million US dollars. Given the introduced international sanctions, the construction of an analogous submarine may currently cost up to 500 million dollars. This class of submarines is also known by the name "Black Hole" due to the hull's ability to absorb sounds and remain stealthy to sonars.

We remind you that the blown-up boat was forced to stay in the port of Novorossiysk due to successful special operations of "Sea Baby" surface naval drones, which forced Russian ships and submarines out of the Sevastopol Bay in temporarily occupied Crimea.

https://t.me/SBUkr/16417

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[–] IphtashuFitz@lemmy.world 22 points 3 weeks ago (1 children)

That video amazing! I don’t see any sort of disturbance on the surface that would indicate something moving underwater. To remotely maneuver into that port, around the other docked ships, and target the sub takes a lot of ingenuity & expertise.

[–] khannie@lemmy.world 19 points 3 weeks ago (1 children)

Yeah, confirmed underwater drone. Incredible work. Russian sources confirming it's sunk.

Russian navy confirming their position as the second best in the black sea.

[–] BakerBagel@midwest.social 3 points 3 weeks ago (1 children)

It's at dock so it is very much still recoverable, although repairs are likely to be expensive. Only three of the US ships that were damaged/sunk at Pearl Harbor were damaged beyind repair. Idk how long this will be out of commission or if the Russians have the necessary parts to repair it, but it is technically salvageable

[–] IphtashuFitz@lemmy.world 11 points 3 weeks ago* (last edited 3 weeks ago)

There’s a mountain of differences between the Pearl Harbor battleships and this submarine. For starters just the fact that this is a submarine is a huge difference. The key component of a sub is the pressure hull. I believe US subs cast the pressure hulls as a single massive piece, so no seams that could suffer from poor welding etc. I know older Soviet subs were two pieces welded together, but I’m not sure if newer ones are one or two pieces. Whatever the case, if that explosion did significant damage to the pressure hull then it’s basically a complete write off. They might be able to salvage components from this sub, but they would have to cast a whole new pressure hull, which basically means a whole new sub.

Then there’s the more modern electronics in these subs. The kilo class subs were first launched in the 1970s, so 30+ years after Pearl Harbor. There’s bound to be a lot of computerized and other electrical gear in the sub that doesn’t take too kindly to being submerged in salt water for a prolonged period of time. There’s bound to be a lot of different metals used throughout the sub, and not just in the electronics. Put different metals in a salt bath and you get electrolysis, which corrodes the metals over time. I doubt raising that sub to the surface and drying it out will be a quick process, so there’s a lot of time for equipment to corrode beyond usefulness.

[–] Tar_alcaran@sh.itjust.works 22 points 3 weeks ago (1 children)

That's impressive!

Even Russia would probably have netting and sonar bouys in place around their own major naval base. It seems extremely unlikely that Russia wouldn't take those super basic measures, which means this drone was stealthy enough to avoid sonar systems AND able to Dodge Submarine/torpedo netting while inside a shallow port.

[–] NotMyOldRedditName@lemmy.world 2 points 3 weeks ago

Like a James bond car where saw blades come out the front the cut the netting.

[–] Valmond@lemmy.world 21 points 3 weeks ago

Wow now that's something!

Russia GTFO!

[–] zabadoh@ani.social 14 points 3 weeks ago (1 children)

It looked like there were a lot of warship targets in the footage.

I'm sure there was a good reason why that particular sub was targeted, "four cruise missile launchers for “Kalibr” missiles" aside.

[–] bluGill@fedia.io 5 points 3 weeks ago (1 children)

Subs are hard to find normally so if you see one it is automatitally a high priority to get it even if you reveal some secrets you don't want them to know (like you can monitor their harbor?). also this sub was launching missles at Ukraine, the other ships were not as useful

[–] zabadoh@ani.social 1 points 3 weeks ago (1 children)

True, but there were at least 2 other subs in the footage, so there must have been some reason why this particular submarine was targeted in favor of the others.

[–] bluGill@fedia.io 2 points 3 weeks ago

This sub was equipped to launch missiles. It is unlikely Ukraine would say why this one.

Could be the only had the ability get one (that is only one sub sea baby), and it was random chance. Could be they could bypass the protections on this while the others were protected by something (sea nets, sonar...) they didn't think they could get by. Those are two obvious ones I can think of (and thus assume Russia knows more than me if either is possibly true). There may be a completely different reason I can't think of though - again I would expect Ukraine not to say (of if they say it might be an incorrect misdirection)

[–] supersquirrel@sopuli.xyz 6 points 3 weeks ago

Ukraine is chasing Russia out of the sea.

[–] Securus777@lemmy.world 3 points 3 weeks ago

Does anyone know how they're getting this footage?