Komsomolets is the most famous submarine disaster.
No self-respecting old building is without its ghosts. The main academic building of the SVVMIU was old (built in 1913) and undoubtedly self-respecting—its position as the longest building in Europe obliged! And by the time the author arrived, it had already acquired its own ghost—the "ghost of Lieutenant Shostak." Cadets who stood nightly fire watch in the building (a tireless duty) claimed that around midnight, an officer in white uniform No. 1 and with a burnt face would stomp loudly along the long parquet corridors—a graduate of the "Gollandiya," Lieutenant Alexander Shostak, who died on the submarine K-278 "Komsomolets."
Lieutenant Alexander Shostak
The longest building in Europe, however!
The K-278 was no ordinary submarine. The USSR struggled to maintain submarine parity with NATO countries, so it decided to make a quantum leap—to build a combat submarine capable of operating at depths accessible only to bathyscaphes. This offered several advantages: at such depths, no torpedo could reach the submarine—it would simply be crushed by the water pressure. Furthermore, depth charges lacked a moderator capable of sinking a target at depths greater than a kilometer.
Nikolay Klimov
Research design work began in 1964 under the leadership of Nikolai Klimov, chief designer of the Rubin Central Design Bureau for Marine Engineering. The preliminary design was approved in July 1969, and the technical design for the deep-sea submarine was approved in 1972. fleet and the Ministry of Shipbuilding Industry. However, Nikolai Klimov himself died two years before the ship's keel was laid, dying in 1976. The performance characteristics of the new submarine, designated Project 685 Plavnik, were as follows: length 117,5 meters, beam 10,7 meters, surface draft 8 meters, surface displacement 5880 tons, submerged displacement 8500 tons, and a crew of 57 (later increased to 64). Armament included six 533mm torpedo tubes with 16 spare torpedoes stored on racks.
K-278 in section
Even the small crew of the submarine suggests that the boat was a highly innovative one for the Soviet Navy, boasting extensive automation. But its main feature was its ability to operate at depths of up to 1000 meters. More precisely, 1000 meters was the operational depth. Furthermore, the submarine had a single reactor, a rarity for Soviet submarines. The turbine powered it produced 43 horsepower. The turbine drove two independent turbogenerators, and a backup diesel generator was also on board.
Arc furnace for melting titanium
The K-278 submarine's high diving depth was achieved by using a lightweight titanium alloy as the structural material for its pressure hull, which led naval wits to dub the submarine the "goldfish." Titanium, while cheaper than gold on the international market at the time, was only slightly cheaper—two to three times (in 2025, a gram of titanium costs around 8 rubles; in the 1970s, it was orders of magnitude more expensive!). The fact is that in 1956, the USSR developed the "vacuum arc with a consumable electrode" method of smelting titanium. As a result, by 1990, the USSR was smelting 1,9 times more titanium than the rest of the world combined, and four times more than the United States. Titanium is roughly equal in strength to steel, but is 40 percent lighter, making it possible to build thicker pressure hulls for submarines.
Project 705 "Goldfish"
The first "goldfish" were the Project 705 Lira submarines, the last of which was decommissioned in 1989. The use of titanium pressure hulls in submarine construction allowed a number of Soviet submarines with titanium hulls to achieve record-breaking results. For example, the Project 661 submarine K-162 holds a still-unbroken underwater speed record of 44,7 knots! In short, Soviet shipbuilders had experience working with titanium by the time construction of the K-278 began.
K-278 underwater
The pressure hull of the K-278 submarine was divided into seven compartments: 1 — torpedo compartment, 2 — living quarters, 3 — main power plant compartment, 4 — reactor compartment, 5 — electrical engineering compartment, 6 — turbine compartment, and 7 — auxiliary machinery compartment. To ensure the submarine's survivability, VPL (air-foam boat) foam generators were installed in compartments 1 and 7, and each compartment except the reactor compartment was equipped with LOH (submarine volumetric chemical) fire extinguishing systems. LOH could be supplied to a compartment from either its own or an adjacent compartment. Two high-power centrifugal pumps were used to pump water out of the compartments.
The submarine's main ballast tank (MBT) could be purged in an emergency using propellant gas generators. Compartments 1, 3, and 7 had hatches through which the crew could abandon ship (or, at least, enter it). A floating capsule (FMC) was located above the entrance hatch of Compartment 3, allowing the entire crew to exit the sunken submarine at once. The capsule contained emergency food, water, a radio, and signaling equipment, and its hull housed inflatable rafts for 20 people each.
In short, the submarine's weakest link was the crew: the functioning of the entire machinery depended on its training. And therein lay the problem. The K-278 was an extremely complex submarine, requiring an extremely high level of training from each individual submariner and teamwork from the crew as a whole. And to their credit, the nuclear submarine had such a crew! The fact is, on the lead hulls of large-scale production or experimental submarines, the crew is always better trained than the average. And the K-278 was precisely that—the first and only deep-diving submarine of its kind.
The crew accepted the submarine from the industry at 70-80 percent readiness, when they had access to systems and mechanisms that were inaccessible when fully operational. And when the factory specialists could advise the submariners on what was going on. Before being cleared for use, each crew member took a test, and an uncertain answer to any question automatically sent the examinee to a retake.
Officers, warrant officers, and petty officers of the K-278 crew, with Captain 1st Rank Yuri Zelensky sitting in the center.
The K-278's crew was formed in 1981. The submarine's first commander was Captain 1st Rank Yuriy Zelensky, who had experience commanding a newly built submarine. The crew completed a full training course at the training center, then participated in the submarine's completion, acceptance trials, and state trials. Overall, the crew's level of training was... Higher than anything else! But, as I've written before, a submarine typically has two crews. Regarding the K-278, the question lingered for a long time: should a full-fledged second crew be trained for the submarine, or should they limit themselves to a "technical" crew, servicing the submarine at base? Ultimately, the decision was made to train a second crew. However, by that time, the submarine had already been completed, passed state trials, and arrived at base. Therefore, its training was... much more theoretical: it did not participate in the ship's completion.
A deep-sea submarine in its natural habitat
In 1984, the Commander-in-Chief of the Soviet Navy approved the State Commission's acceptance certificate, and K-278 was commissioned into the Navy. By the end of 1985, Captain 1st Rank Zelensky's crew had successfully completed all course assignments—the submarine "entered the campaign," and the crew began receiving "naval" assignments. On August 4, the newborn submarine made a record-breaking dive—first to 1000 meters, then another 27 to test its response to a possible submergence. The submarine performed admirably—several titanium bolts were sheared off by the intense pressure applied to the hull, several leaks were noted at flange joints, minor defects were noted in the stern tube seal, the lower hatch cover, and... that's it! K-278 proved that the shipbuilders had mastered the task, and the Soviet Navy acquired the world's only deep-diving nuclear submarine.
Northern Fleet Commander-in-Chief Admiral Ivan Kapitanets
Upon returning to base, the submarine was inspected by Northern Fleet Commander-in-Chief Admiral I. M. Kapitanets, who congratulated the crew on the dive and called them "a crew of heroes." These last words weren't mere rhetoric—all crew members were nominated for state awards. However, the award lists were rejected by the fleet's political department. Why? They didn't include a single naval "political worker" except for the submarine's political officer, Vasily Kondryukov, who actually participated in the deep-sea dive.
In 1986, K-278 conducted experimental tactical exercises in the Norwegian Sea as command determined how best to utilize the newly acquired advantage. The exercises included a test of surfacing from a working depth, and the submarine conducted its first fully autonomous cruise. The submarine's trial period ended. The commission concluded that the creation of a deep-sea combat submarine was a major scientific and technological achievement for Russian shipbuilding. The submarine was planned to be used to develop deep-sea navigation tactics as part of a research program. However, since the ship was unique, it was recommended to limit its use to the extent necessary to maintain the high qualifications of the crew.
Captain 1st Rank Evgeny Vanin
Zelensky's crew completed another combat mission; no emergencies occurred, and all assigned tasks were completed in full. In October 1988, K-278 received its proper name, "Komsomolets," for its successes. Planning for further research began; Komsomolets was scheduled to sail on its next mission alongside the research vessel "Akademik A.N. Krylov," but... Suddenly, the decision was made to send the submarine on a routine mission, with a second crew led by Captain 1st Rank Yevgeny Vanin.
The second crew was considered front-line, but its level of training was significantly lower than the first: the training center lacked simulators for the new submarine. The crew first saw the submarine in 1985, when she was already at sea for a trial run. In principle, this was not a big deal: the crew simply needed time to learn the ship and practice all the required procedures. But the trial run was in a rush, and the submarine was not handed over to the second crew until its completion. Essentially, the crew was a "technical" one—capable of "keeping" the Komsomolets in the base (only a few of the crew had ever sailed on the K-278). However, the crew coped with this task successfully, completing a second training course at the training center in 1986 and, in early 1987, receiving the opportunity to practice Task L-1 ("Preparing a Submarine for Sea"). The second crew's sea time was 32 days.
Komsomolets at sea
In 1988, Komsomolets again set out on an independent cruise with the first crew. The second crew was sent to a training center for a third time. By the time they set out, the second crew had been off-duty for over six months. According to the VMF-75 submarine safety regulations, in this case, the crew must be given 30-50 days (including completing tasks L-1 and L-2) to rehabilitate lost skills. However, the crew was not granted this time: a day for a control check for task L-1, and a three-day pre-repair voyage, combined with completing task L-2 (according to the documents, this requires at least five days). The remaining time was spent on inter-voyage repairs. In 1988, the crew spent only 24 days at sea.
The senior officer on board was Captain 1st Rank Boris Kolyada.
On February 11, 1989, Komsomolets and its second crew put to sea for a final readiness check for combat duty. Throughout the entire checkout, elevated oxygen levels were recorded in the atmosphere of compartment 7, at times exceeding 30 percent. On February 28, 1989, the submarine and its second crew were prepared for patrol duty. First Mate O. G. Avanesov, BC-5 battalion commanders V. A. Yudin and A. M. Ispenkov, and hydroacoustic engineer I. V. Kalinin were seconded from the first crew. Captain 1st Rank Vanin and several officers had experience with the first crew.
The ship's political officer arrived on board two weeks before departure. Eight lieutenants had up to 35 days of seagoing experience. Most of the warrant officers had up to 70 days of seagoing experience, but some were unqualified for independent duties, and Warrant Officer Yu. P. Podgornov (a hold technician!) had never served on a submarine before. Of the 15 sailors and petty officers serving on conscript duty, eight were scheduled for discharge after the deployment, and two were drafted into the navy in 1988. The senior officer on board was the deputy division commander, Captain 1st Rank B. G. Kolyada, who had previously commanded Project 705 submarines but had not completed retraining on the K-278. On February 28, the Komsomolets set out to sea with 69 sailors, petty officers, warrant officers, and officers on board. The crew of Captain 1st Rank Vanin was to complete a 90-day autonomous mission.
Komsomolets at sea
April 7, day 38 of the expedition. The submarine is traveling at a depth of 387 meters, traveling at 8 knots, and is on combat alert #2, with the second shift on watch. The propulsion plant is operating without issue, the atmospheric gas composition is normal, and all equipment is in good working order, with the exception of the television system monitoring the compartments and the oxygen sensors in compartments 5 and 7. At 11:06, a sharp ringing breaks the silence, and the ship's intercom announces, "Emergency alarm! Fire in compartment 7! Ascend to a depth of 50 meters!"
LOH is not at all what you think!
At 11:03, the watchman reported to the Central Station: "The temperature in Compartment 7 is over 70 degrees Celsius, and the insulation resistance of the compartment's power grid is low." The watchman in Compartment 7 failed to respond to the order to initiate a fire alarm in the compartment. The watchmen in Compartments 5 and 6 were ordered to initiate a fire alarm in Compartment 7, but they were also unable to contact them. The commander of the electromechanical warfare unit, Captain 2nd Rank Valentin Babenko, assumed command of the damage control operation. The watchman was replaced by the first mate, Captain 2nd Rank Oleg Avanesov, and the assistant commander transferred to the emergency communications station with the ship's compartments. Deputy Division Commander Captain 1st Rank Kolyada arrived at the Main Control Station to find everyone in position.
Warrant Officer Vladimir Kolotilin, remote control group technician
At this time, Warrant Officer Kolotilin reported smoke coming from Compartment 6. He received the order to send a smoke detector to Compartment 7 from Compartment 6. At 11:10, Compartment 6 reported that the smoke leaks had been fixed, but the compartment was difficult to breathe. At 11:16, Warrant Officer Kolotilin reported turbine oil coming from the turbogenerator into the compartment. In this situation, the television cameras in Compartments 6 and 7 would have been very useful, but the television monitoring system was not working (the quality of Soviet cameras was so-so; I never saw the compartment cameras working...).
The submarine was surfacing at 10 knots when the main turbine stopped—the main turbine protection system (GTZ) tripped (surfacing "under the GTZ" prevented the bulkhead between compartments 6 and 7 from sealing due to the propeller shaft rotating). At 11:14, the central group of the central gas balance was purged, and at 11:16, the Komsomolets surfaced completely, having purged its ballast. At 11:20, the upper conning tower hatch was opened, and Captain 1st Rank Kolyada and the submarine's assistant commander, Lieutenant Commander A. Verezgov, emerged onto the bridge. Communication between the bridge and the main control room was lost, but was later restored.
Why did the fire start? Compartment 7 contained a fair amount of electrical equipment, and it tends to spark from time to time. Under normal conditions, this isn't a problem, but with elevated oxygen levels... The lower aft section of the compartment contained turbine oil, paint, and electrical cable. If the turbine oil had ignited under normal oxygen levels, the oxygen in the compartment would have quickly burned off, and the fire would have extinguished itself. But with elevated oxygen levels, as calculations later showed, the temperature could have exceeded 500 degrees Celsius, and the high-pressure air system (HPA) fittings could have heated up to 220 degrees Celsius, at which point the synthetic gaskets lose their properties and air begins to flow into the compartment, fueling the combustion. Under these conditions, everything starts to burn! But most importantly, the elevated oxygen levels in the compartment can completely neutralize the freon in the LOH system.
It is known that the oxygen sensor in the 7th compartment was malfunctioning, and in October 1988 it even had to be repaired. The head of the Komsomolets chemical service, Lieutenant Commander Gregulev (the author did his diploma project with him) G. T.) later reported: "...There was only one gas control—on the control panel. I couldn't control the air throughout the entire submarine. In the stern, oxygen distribution was automatic." Unfortunately, this is not uncommon on submarines; excess oxygen in a compartment often leads to fires: with 30 percent oxygen in the atmosphere, any spark can cause a full-scale fire. Or even spontaneous combustion of oily rags can occur. The entry of high-pressure air into the compartment turned an ordinary fire into a blast furnace.
It's worth noting right away that Vanin's crew made several mistakes that the more experienced first crew would have avoided. First, the emergency alarm was sounded three minutes after the fire in compartment 7 was detected. Three minutes is a very long time in a developing fire! Furthermore, the commanders of compartments 6 and 7 were detained at the main control center for a briefing, resulting in the bulkhead between compartments 6 and 7 not being sealed. Furthermore, the valves of the high-pressure air system supplying the aft compartment were not closed. All of these measures are mandatory in this situation, and with a more experienced crew, they would have been carried out.
The high-pressure air entering Compartment 7 inflated the compartment, causing oil to flow through the unsealed oil lines into Compartment 6, which was noticed by Warrant Officer Kolotilin. At 11:18 AM, the fire spread to Compartment 6. The high-pressure air entering here also triggered the reactor's emergency protection system and shut down both turbogenerators. The compressors and fans lost power, and the compartment temperature began to rise, causing the valves of the fourth high-pressure air group to open. From 11:16 AM to 12:00 PM, air from three of the four high-pressure air groups—6,5 tons of air—was released into Compartments 7 and 6! Temperatures in Compartments 7 and 6 reached 1100 and 450 degrees Celsius, respectively. For comparison, the temperature in a blast furnace reaches 2000 degrees Celsius—comparable values. And considering that the pressure in the compartments rose to 13 atmospheres...
The fire in Compartment 7 lasted an hour, and in Compartment 6, 30-35 minutes. This was enough time to burn through the seals of the overboard fittings and the insulation of the cables extending from the pressure hull. All of this was forced out by the excess pressure in the compartments, and water began to enter the pressure hull. According to experts, 300-500 liters of water entered the compartments per minute. Furthermore, the fire caused the hatch of Compartment 7 and the seals of the steering gear to become unsealed. Hot, pressurized combustion products from the depressurized pressure hull began to flow into Central City Hospital No. 10, causing a breach of its seal.
Around 12:00, the venting of high-pressure fuel into the compartments ceased, extinguishing the fire. Meanwhile, as the fire progressed, combustion products began to spread throughout the submarine. At 11:22, smoke coming from the rudder indicator unit forced everyone on the main control unit to put on personal protective equipment. This smoke masked the entry of toxic combustion products from the stern into the hold of the third compartment through the unsealed trim line. Between 11:30 and 11:50, a large-scale flash occurred on the upper deck of the fifth compartment. It did not cause a fire, but several people were severely burned, most severely, Captain Lieutenant Nikolai Volkov and Lieutenant Alexander Shostak. Most likely, the ignition was caused by products of incomplete combustion of turbine oil, which entered the compartment through unclosed valves on the return steam line and through the steam-air mixture exhaust line. The oil heated up near the red-hot bulkhead, and in the 5th compartment there was also an increased oxygen content, a random spark, and...
SHDA is a hose-type breathing apparatus. These red boxes are attached to the ceiling, you pull the handle, and a mask falls onto your head...
When Warrant Officer Kadantsev cleared the upper hatch of the VSK and climbed onto the bridge, he noticed steam rising from the stern of the submarine. Captain 1st Rank Kolyada recalled exactly the same thing, also mentioning a bubbling sound near the side of the submarine—a sign of high-pressure airborne gases entering the depressurized compartments. The entry of combustion products into compartments 5, 3, and 2 prompted the crew to activate their breathing apparatus (HPA). However, the lines carrying air from the aft cylinder groups were not closed, and the submariners who activated their HPA began inhaling high concentrations of carbon monoxide, causing them to lose consciousness.
Captain 3rd Rank Vyacheslav Yudin, commander of the survivability division
At 12:06, Captain 3rd Rank Vyacheslav Yudin and Lieutenant Anatoly Tretyakov were sent aft on reconnaissance. They discovered Lieutenant Andrei Makhota and Warrant Officer Mikhail Valyavin in the equipment enclosure of Compartment 6 and escorted them out. After a short rest, Makhota and Valyavin were sent by the ship's commander to Compartment 5 to provide assistance to the personnel there. They discovered eight people in the compartment: six activated by the IDA-59, two by the ShDA. Those activated by the ShDA could not be rescued. The ship's doctor was able to revive four submariners from Compartment 2, who had also activated the ShDA. Using the ShDA in the conditions of such a fire was also a mistake, one that the submarine's first crew would likely have avoided.
The VSK surfaced from a depth of 1000 meters...
By 1:30 PM, the pressure in the emergency compartments had equalized with atmospheric pressure, and seawater began to enter. At 13:00 PM, the submarine had a stern tilt of 13 degree, at 16:00 PM, 3 degrees, and at 17:00 PM, 6,3 degrees, according to the submarine's logbook and confirmed by aerial photography. With each passing minute, the amount of water entering the aft compartments increased—the stern sank, and the pressure increased. As the stern sank, the bow rose, and air began to escape from the exposed vent valves of the bow ballast tanks. The Komsomolets lost buoyancy.
At 16:40 PM, the order was given to the submarine to prepare for evacuation, prepare the lifeboats, and launch life rafts. Only one raft was launched; another was dropped from an Il-38 aircraft. Between 5:03 and 17:05 PM, the submarine began to rapidly list by the stern. When the trim reached 50-60 degrees at 17:08 PM, the submarine submerged with 25 percent of its high-pressure water remaining, and with its compressors and bilge pumps still operational. The diesel generator, which provided power, continued to operate until the very last moment, under the supervision of Captain 3rd Rank Anatoly Ispenkov, commander of the electrical division of BC-17. The submarine's commander, Captain 1st Rank Vanin, and four other sailors managed to climb into the containment chamber and surface, but after surfacing, the pressure difference in the containment chamber blew off the top hatch, throwing Warrant Officer Sergei Chernikov into the sea. Only Warrant Officer Viktor Slyusarenko was able to escape alive.
Submariners on an overturned life raft, photograph from Komsomolskaya Pravda
As sad as it is to write this, the crew had the opportunity to save the submarine. The floating base "Alexei Khlobystov" was on its way to the K-278's aid, and naval aircraft were circling above the stricken submarine. aviationWhen the Aleksey Khlobystov arrived at the accident site at 6:20 PM, 16 submariners had already died of hypothermia, and one (Captain 3rd Rank Ispenkov) had sunk with the submarine. Thirty surviving sailors were rescued from the water, and the bodies of 16 dead were recovered. The submarine's diesel generator and bilge pumps were still working, and it had a high-pressure air reserve, meaning it had everything it needed to maintain buoyancy for at least several hours. From 2:18 PM, radio communications with the shore command post were maintained via an aircraft relay.
Rescued by boat from the Alexey Khdobystov
The accident resulted in the deaths of 42 submariners, the vast majority of whom—30—died before help arrived: two during the damage control battle, two from carbon monoxide poisoning, three unable to abandon ship, two perished with the ship at their combat posts, and three died on the floating base "Alexey Khlobystov" from the effects of hypothermia. Twenty-seven crew members of the K-278 Komsomolets submarine survived. By a decree of the Presidium of the Supreme Soviet of the USSR on May 12, 1989, all crew members of the submarine were awarded the Order of the Red Banner.
Rescued submariners in the hospital
The most interesting part began with the investigation into the submarine's sinking. The Navy command put forward a theory about certain "design flaws" that caused the Komsomolets's demise. This theory was immediately rejected by those involved in the submarine's operation. The fact is, any submarine has design flaws, but most of them operate without problems alongside them: a submarine is too complex a machine to be free of flaws; the challenge is to ensure those flaws aren't fatal.
The Komsomolets had no fatal flaws. The crew's errors during the damage control operation were obvious, but... But pursuing this thread could have raised unpleasant questions, such as: "Who sent a submarine with an insufficiently trained crew to sea?" The situation here was very similar to the K-429 accident, where the number of personnel assigned also prevented the crew from being sent to sea. But there is another similarity between these two accidents. In the case of the K-429, the flotilla's chief of staff was Rear Admiral Oleg Frolov. In the case of the K-278 accident, he was also the commander of the 1st Flotilla of the Northern Fleet. The strong-willed approach to personnel decisions in these two cases is very similar.
There's a famous saying by I.V. Stalin: "Personnel decide everything." Regardless of one's overall opinion of the quarter-century reign of the "best friend of Soviet athletes," one cannot help but note his correctness in this regard. The "human factor" in man-made disasters often takes the form of personnel shortcomings—an inappropriately placed individual can become the straw that triggers a cascade of malfunctions that leads to disaster. And a submarine, which had every reason to be considered the best in the Soviet Navy, will sink...
All photos are taken from open sources.
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