- 2 months ago
Four men climb into a submarine so small they cannot stand upright, then begin one of the boldest Royal Navy missions of World War II. Operation Source sent X-class midget submarines through the North Sea to infiltrate a heavily defended Norwegian fjord and place explosive charges beneath the battleship Tirpitz, a ship that had tied down Allied forces for months.
This military history documentary follows the planning, training, towing voyage, and tense underwater approach through anti-submarine nets, patrols, and narrow waters. As mechanical failures and losses reduce the force, the surviving crews press on toward Kåfjord, where precision, endurance, and nerve matter more than firepower. The attack cripples Tirpitz and forces Germany to spend months on repairs.
A gripping World War II naval story, Operation Source is ideal for viewers searching for military history documentaries, Royal Navy special operations, submarine warfare, and the story of Tirpitz in 1943. It also fits searches for WW2 history, Arctic convoy warfare, and daring commando-style raids at sea.
This military history documentary follows the planning, training, towing voyage, and tense underwater approach through anti-submarine nets, patrols, and narrow waters. As mechanical failures and losses reduce the force, the surviving crews press on toward Kåfjord, where precision, endurance, and nerve matter more than firepower. The attack cripples Tirpitz and forces Germany to spend months on repairs.
A gripping World War II naval story, Operation Source is ideal for viewers searching for military history documentaries, Royal Navy special operations, submarine warfare, and the story of Tirpitz in 1943. It also fits searches for WW2 history, Arctic convoy warfare, and daring commando-style raids at sea.
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LearningTranscript
00:00Four men climb into a submarine so small they cannot even stand upright inside it.
00:05Every movement has been rehearsed countless times, yet none of them can know whether they will ever see daylight again.
00:12Once the hatch is sealed, there will be little room to move, little fresh air, and almost no margin for
00:18error.
00:19For the next several days, their world will shrink to a steel cylinder no longer than a city bus.
00:26Their destination is not an enemy port or a fleet at sea.
00:30It is a quiet Norwegian fjord, surrounded by towering mountains and guarded by some of the most formidable naval defenses
00:38Germany has ever assembled.
00:41Beyond those defenses waits a single battleship that Britain has tried repeatedly to neutralize, but never quite managed to destroy.
00:49Between these men and their objective lie freezing waters, powerful currents, anti-submarine nets stretching beneath the surface,
00:58patrol craft searching for intruders, lookout posts scanning every approach, and crews trained to expect an attack at any moment.
01:07Every obstacle has been designed to stop exactly the kind of mission these sailors are about to attempt.
01:13Yet their orders are remarkably simple.
01:16They are not expected to fight a naval battle.
01:19They are not expected to fire torpedoes from a distance.
01:22Instead, they must guide their tiny submarine through every layer of those defenses,
01:28slip beneath one of the largest warships in the world,
01:31and leave behind explosive charges powerful enough to cripple a vessel that has become one of Nazi Germany's greatest strategic
01:38assets.
01:39If they succeed, a handful of men inside machines barely larger than escape pods
01:45could achieve what bombers, battleships, and conventional submarines had struggled to accomplish.
01:51If they fail, they will almost certainly disappear beneath the cold waters of northern Norway,
01:57with few people ever knowing how close they came.
02:00To understand why Britain was willing to risk such an extraordinary mission,
02:04we first have to meet the giant waiting in the depths of that fjord.
02:08The battleship waiting inside Kofjord was Tirpitz,
02:12the largest warship ever built by Germany and the sister ship of the infamous Bismarck.
02:18Although Bismarck's career had ended dramatically in the North Atlantic,
02:22Tirpitz remained very much alive,
02:25and for the Allies, that made her an even greater long-term problem.
02:30Stretching more than 250 meters in length and displacing over 50,000 tons at full load,
02:35Tirpitz carried eight 38-centimeter guns capable of striking targets many kilometers away.
02:42Her thick armor protected vital areas from heavy shells,
02:46while an extensive secondary battery and anti-aircraft weapons made any direct assault extremely dangerous.
02:53On paper, she represented exactly the kind of capital ship every navy feared.
02:58Yet the true power of Tirpitz did not come from the number of battles she fought.
03:03In fact, compared with many famous warships of the Second World War,
03:08her combat record was relatively limited.
03:10Instead, her greatest weapon was uncertainty.
03:14As long as Tirpitz remained operational,
03:17Allied commanders could never ignore the possibility that she might leave her Norwegian anchorage
03:22to attack Arctic convoys carrying desperately needed supplies to the Soviet Union.
03:27Those convoys transported tanks, aircraft, ammunition, fuel, food,
03:33and countless other materials essential for keeping the Eastern Front supplied.
03:37Losing even a single convoy could have serious strategic consequences.
03:42Because of that possibility,
03:44the Royal Navy was forced to maintain powerful forces
03:47ready to respond whenever Tirpitz appeared to be preparing for sea.
03:52Battleships, aircraft carriers, cruisers, destroyers, submarines,
03:57and reconnaissance aircraft were all committed to watching,
04:00shadowing, and preparing for a threat that often never materialized.
04:04The mere existence of Tirpitz influenced operational planning across thousands of kilometers of ocean.
04:11Every report of movement triggered concern.
04:13Every intelligence update demanded attention.
04:16Every Arctic convoy sailed under the shadow of a ship that might appear over the horizon.
04:21German commanders understood this perfectly.
04:25Tirpitz did not need to sink convoy after convoy to justify the enormous resources invested in building her.
04:32Simply forcing Britain to commit major naval forces in response achieved an important strategic objective.
04:38For Winston Churchill, the battleship became an almost constant source of frustration.
04:44He later described Tirpitz as a significant menace to Allied shipping,
04:49reflecting the anxiety she created far beyond the waters she actually sailed.
04:53The Allies therefore searched continuously for ways to remove her from the equation.
04:58Carrier aircraft attacked.
05:00Submarines patrolled likely routes.
05:02Reconnaissance missions photographed her anchorage whenever weather allowed.
05:06Plans were drafted, revised, and abandoned as commanders searched for a weakness.
05:10Again and again, however, the same problem emerged.
05:14Finding Tirpitz was difficult.
05:16Reaching her was even harder.
05:18Destroying her once she was sheltered inside the Norwegian fjords seemed almost impossible.
05:24Northern Norway offered Tirpitz something that no amount of armor alone could provide.
05:28Geography.
05:30Kofjord lay deep inside the Altefjord system,
05:33where steep mountains rose directly from cold, narrow waters.
05:37The surrounding landscape created natural barriers that limited the directions from which an attacker
05:43could approach, while giving defenders commanding views over the entrances to the fjords.
05:48But nature was only the first line of defense.
05:51The Germans reinforced the anchorage with an increasingly sophisticated network of protective measures.
05:57Anti-submarine nets stretched beneath the surface to block underwater intruders.
06:02Patrol vessels continuously searched the surrounding waters.
06:05Observation posts watched for unusual activity from the surrounding hillsides.
06:10Hydrophones listened for suspicious underwater sounds,
06:13while anti-aircraft batteries stood ready against attacks from above.
06:18Every layer supported the next.
06:20An aircraft might evade one defense only to encounter another.
06:24A submarine that slipped through one obstacle still faced several more before reaching its target.
06:29Even if an attacker somehow reached Tirpitz, escaping afterward presented an entirely different challenge.
06:36Distance also favored the defenders.
06:39Any operation launched from Britain had to cross hundreds of kilometers of often hostile sea
06:45before even reaching northern Norway.
06:48Crews would arrive tired, equipment worn,
06:50and every mechanical component tested long before the real mission began.
06:56The Royal Navy repeatedly examined conventional solutions,
06:59but each seemed to encounter the same obstacle.
07:02Bombing accuracy was affected by weather, terrain, and heavy defenses.
07:07Surface attacks risked catastrophic losses.
07:09Standard submarines lacked the ability to penetrate the protected anchorage closely enough to guarantee success.
07:16With every unsuccessful attempt, one conclusion became increasingly clear.
07:21The closer an attacker came to Tirpitz, the more difficult the mission became.
07:25If aircraft could not reliably destroy the battleship,
07:29perhaps the next attack should come from somewhere no one expected.
07:32The answer did not come in the form of a larger battleship or a more powerful bomber.
07:37It came in the form of one of the smallest submarines ever sent into combat.
07:42Known as the X-Class, these remarkable vessels had been developed for a completely different way of fighting at sea.
07:49Rather than confronting enemy warships directly,
07:52they were designed to infiltrate places that conventional submarines simply could not reach.
07:58Each craft measured only around 15 and a half meters in length.
08:02Inside that cramped hull, a crew of four men lived and worked surrounded by machinery,
08:07batteries, controls, and explosives.
08:10Every available space served a purpose.
08:12Comfort had never been part of the design.
08:15Instead of carrying a large supply of torpedoes,
08:18the X-Craft relied on two detachable side charges filled with powerful explosives.
08:24The plan was not to fire at the target from a safe distance.
08:27The submarine itself had to reach the objective,
08:31carefully position the charges beneath the enemy vessel,
08:34set delayed fuses, and withdraw before the explosion.
08:38It was an operation that demanded exceptional navigation, precision, and discipline.
08:43The small submarines also faced severe limitations.
08:47Their size restricted endurance.
08:49Battery power had to be managed carefully.
08:51Fresh air was limited.
08:52Mechanical reliability could never be taken for granted during such a demanding mission.
08:57To overcome their limited range,
09:00larger Royal Navy submarines would tow the X-Craft across much of the journey toward Norway
09:04before releasing them for the final approach.
09:07Even that solution introduced new risks.
09:11A damaged tau line, worsening weather, or mechanical failure
09:15could end the mission long before the enemy ever came into view.
09:18Everything depended on equipment that had never before attempted.
09:23An operation quite like this.
09:25Everything depended on crews who knew that once they separated from their towing submarines,
09:30there would be no realistic expectation of rescue.
09:34For the men selected to carry out Operation Source,
09:37reaching Tirpitz was only the objective.
09:40Simply reaching Norway would become its own battle.
09:43Before a single X-Craft left British waters,
09:47Operation Source demanded months of preparation,
09:50unlike almost anything the Royal Navy had attempted before.
09:54Success would depend far less on firepower than on precision.
09:57Every movement, every procedure, and every decision
10:01had to become instinctive long before the crews ever saw the Norwegian coast.
10:06The men selected for the mission were volunteers,
10:10but volunteering alone was not enough.
10:13Operating an X-Class submarine required an unusual combination of qualities.
10:18A crew member needed technical knowledge,
10:20physical endurance, calm judgment under pressure,
10:23and the ability to remain focused
10:25while confined inside an impossibly small space for days at a time.
10:30Unlike larger submarines,
10:32there was almost no opportunity to escape the people around you.
10:36Every task was performed shoulder to shoulder with the rest of the crew.
10:39Heat, noise, moisture, and the smell of machinery became constant companions.
10:45Sleep came in short, uncomfortable periods
10:47whenever another crew member could temporarily take over a position.
10:51Privacy simply did not exist.
10:54Training reflected the extraordinary nature of the mission.
10:57The crews practiced underwater navigation until they could judge position with remarkable accuracy,
11:03despite seeing almost nothing outside the hull.
11:06They rehearsed placing explosive side charges beneath anchored ships.
11:10They repeatedly drilled procedures for diving, surfacing,
11:14trimming the submarine, and recovering from equipment failures.
11:18Particular attention was given to one obstacle they knew they would almost certainly encounter.
11:23Anti-submarine nets.
11:26These barriers were designed specifically to stop submarines from entering protected anchorages.
11:32Learning how to locate openings, work around obstacles,
11:35or pass beneath sections of netting without becoming hopelessly entangled
11:39required patience and absolute precision.
11:42A single mistake could leave a submarine trapped beneath the surface with little hope of escape.
11:49Navigation presented another challenge.
11:51The X-craft would spend much of their final approach operating almost blind.
11:56Compass headings, estimated speed, tidal currents, underwater landmarks, and careful dead reckoning
12:02all had to combine into a mental picture of waters the crews often could not actually see.
12:09Secrecy surrounded every stage of the operation.
12:12Only those directly involved knew the full objective.
12:16Information was tightly controlled, not only to prevent enemy intelligence from learning of the plan,
12:22but also because the mission itself remained highly experimental.
12:26No one could honestly predict whether it would succeed.
12:30The crews were preparing for an operation that had never before been attempted under combat conditions.
12:36Even after months of rehearsal, uncertainty remained.
12:39The men could master every drill performed in British waters.
12:42They could memorize procedures.
12:44They could become experts in operating their submarines.
12:47But they could not rehearse the unpredictable currents of a Norwegian fjord.
12:51They could not practice against an enemy who would actively try to stop them.
12:55And they could not know how their machines or their own bodies would respond after days of confinement,
13:01exhaustion, and mounting pressure.
13:04Soon, training would end.
13:06The real test would begin hundreds of kilometers from home.
13:10Getting the X-craft close enough to attack Tirpitz presented a problem almost as difficult as the attack itself.
13:16The submarines simply did not possess the range to travel from Britain to northern Norway,
13:22carry out their mission, and return safely under their own power.
13:25Their batteries, fuel, and supplies were intended for the final phase of the operation,
13:31not the long journey across the North Sea.
13:34The solution was as ingenious as it was risky.
13:38Each X-craft would spend much of the voyage under tow behind a full-sized Royal Navy submarine.
13:45Long towing cables connected the tiny submarines to their larger partners
13:49as both vessels headed north through waters patrolled by German aircraft, warships, and submarines.
13:55The arrangement conserved the X-craft's limited endurance,
13:58but it also introduced a new set of dangers.
14:01Every hour placed strain on the towing gear.
14:04The cables had to withstand changing sea conditions
14:08while pulling vessels never intended to spend days trailing behind another submarine.
14:12A failure could leave an X-craft alone in open water,
14:17far from its destination, and with little chance of completing the mission.
14:21Life inside the towed submarines remained demanding.
14:25The crews were largely passengers, yet there was little opportunity to relax.
14:30They constantly monitored equipment, maintained batteries, checked systems,
14:34and prepared for the moment they would separate from their towing submarines.
14:38Every vibration, every unusual sound, and every unexpected movement demanded attention.
14:45Outside, the North Sea offered little comfort.
14:48September weather could change rapidly.
14:51Rough seas increased stress on both submarines and towing cables,
14:54while poor visibility complicated navigation for everyone involved.
14:59Conditions that were merely uncomfortable for larger vessels
15:02became far more serious for the tiny X-craft.
15:05Time also worked against the crews.
15:08The longer the voyage lasted, the more fatigue accumulated.
15:11Sleep remained irregular.
15:13Meals were limited.
15:14Fresh air was scarce.
15:16Moisture condensed on the metal hull and equipment,
15:19creating a cold, damp environment that never truly dried out.
15:23Even routine maintenance became physically exhausting inside such confined conditions.
15:27By the time the attack began,
15:30many of the men would already have spent days living in circumstances
15:33that tested both concentration and endurance.
15:37Yet despite every precaution,
15:39the greatest threat during this phase did not come from the enemy.
15:42It came from the relentless possibility that machinery might fail.
15:47A damaged valve, a faulty engine component,
15:50a leaking seal, a weakened towing connection.
15:53Any one of them could end months of planning without a single German sailor
15:57ever realizing an attack had been attempted.
16:00As the task force continued toward Norway,
16:03the operation remained intact.
16:06But that would not last.
16:08The greatest losses of Operation Source would begin
16:11before the surviving crews ever caught sight of the fjords.
16:15Operation Source had been carefully planned,
16:17but the sea had little interest in carefully prepared plans.
16:20Long before the surviving X-Craft approached their target,
16:24the operation began losing submarines, equipment, and experienced men.
16:30One of the earliest disasters occurred
16:32when X-8 developed serious mechanical problems during the voyage.
16:36Attempts were made to keep the submarine operational,
16:39but repeated failures made it increasingly clear
16:42that she could not continue safely toward Norway.
16:44Rather than risk capture and compromise the entire mission,
16:49her crew destroyed the vessel and transferred to the towing submarine.
16:53The attack force immediately became smaller.
16:56Elsewhere, the dangers of towing revealed themselves in even harsher ways.
17:01X-9 was being towed through difficult conditions when disaster struck.
17:05At some point during the voyage, the Tau Line parted.
17:10Hidden beneath rough seas and poor visibility,
17:13the loss was not immediately detected.
17:16By the time the towing submarine realized what had happened,
17:19X-9 had disappeared.
17:21The four men aboard were lost.
17:23There was no battle.
17:25No exchange of gunfire.
17:27No dramatic last stand.
17:28One moment they were part of the operation,
17:31the next, they had vanished beneath the North Sea.
17:34The dangers continued.
17:36X-10 also experienced persistent mechanical difficulties
17:40serious enough to cast doubt on her ability to complete the attack.
17:44Although she would eventually reach Norwegian waters,
17:47the reliability of her equipment
17:49had become a growing concern for her crew and commanders alike.
17:53Each setback forced difficult decisions.
17:56Should damaged submarines continue despite increasing risks?
18:00Should they withdraw before endangering the rest of the force?
18:03Or should commanders press forward knowing that every submarine lost
18:07reduced the chances of damaging turpets?
18:09These choices carried enormous consequences
18:12because the operation depended on numbers as well as skill.
18:16Multiple X-craft had been assigned different targets within the anchorage.
18:20Every withdrawal reduced flexibility and increased pressure on the crews,
18:25still moving toward the objective.
18:26For those who remained, the psychological burden steadily grew heavier.
18:31They knew other submarines had already been forced out of the operation.
18:35They knew fellow sailors had been lost before even reaching enemy defenses.
18:39They also knew there was no replacement waiting behind them.
18:43Every surviving crew now carried a greater share of the mission.
18:46Operation Source had quietly transformed.
18:49It was no longer simply a carefully coordinated special operation.
18:53It had become a struggle against fatigue, mechanical failure, and the unforgiving sea itself.
19:00By the time the surviving X-craft approached the entrance to Altefjord,
19:04the force that had departed Britain no longer existed in its original form.
19:08Only a handful of submarines remained.
19:11Everything that followed would depend on them.
19:15As the Norwegian coastline drew closer,
19:17the surviving X-craft reached the point where they would continue alone.
19:21One by one, the towing lines were released.
19:24The larger Royal Navy submarines turned away to begin their own hazardous journey home,
19:30leaving the miniature submarines to complete the most dangerous phase of the operation without support.
19:36From this moment onward, every decision rested entirely with the attack crews.
19:41The waters ahead demanded absolute precision.
19:45Unlike open ocean navigation, the fjords offered little room for error.
19:49Narrow channels, changing depths, underwater obstacles, and tidal currents combined to make even small mistakes potentially fatal.
19:58A submarine, drifting only slightly off course,
20:01could find itself dangerously close to rocks or directly beneath enemy observation posts.
20:07Progress slowed considerably.
20:09The crews frequently relied on dead reckoning,
20:13carefully estimating their position while periodically raising the periscope whenever conditions allowed.
20:19Every brief glance above the surface carried its own risk.
20:23A watchful sentry, a passing patrol boat, or even an unusual ripple on the water could expose the operation.
20:30The surrounding mountains added another layer of difficulty.
20:33They sheltered the anchorage from large ocean swells,
20:37but they also affected local winds and currents in ways that were not always predictable.
20:43Water flowing through the narrow fjords could push the tiny submarines off course just when accurate positioning mattered most.
20:50Then came the defensive barriers.
20:53The anti-submarine nets represented one of the greatest obstacles of the entire mission.
20:58These heavy steel barriers had been carefully positioned to prevent underwater intruders from reaching the anchorage.
21:04Passing them required patience, ingenuity, and careful judgment.
21:08Every attempt risked snagging equipment or producing noise that nearby defenders might detect.
21:15Inside the submarines, the atmosphere grew increasingly oppressive.
21:19Battery power had to be managed carefully.
21:21Carbon dioxide levels slowly increased.
21:24Every unnecessary movement wasted precious energy.
21:27The constant hum of machinery, interrupted only by whispered conversation and the occasional sound of water against the hull,
21:35reminded the crews how completely isolated they had become.
21:39Hours passed at a relentless pace.
21:42There were no dramatic battles, no explosions.
21:45Only slow, deliberate movement through hostile waters where discovery could come at any moment.
21:51Mechanical reliability remained a constant concern.
21:54A minor equipment fault that might have been inconvenient during training could now doom the entire operation.
22:00Every gauge mattered.
22:02Every valve mattered.
22:03Every sound mattered.
22:05Somewhere ahead, hidden among the mountains, lay turpits.
22:09The men were closer than anyone had previously managed to reach,
22:12but the most heavily defended waters of the entire mission still lay before them.
22:17As dawn approached on September 22, 1943,
22:21two of the surviving submarines moved steadily toward the heart of the German anchorage.
22:26They were X-6, commanded by Lt. Donald Cameron,
22:30and X-7, commanded by Lt. Basil Place.
22:34Months of preparation, weeks of planning, and days of exhausting travel had brought them to this single moment.
22:41Ahead lay turpits.
22:43Around her stood layers of defenses specifically designed to prevent exactly what these crews intended to do.
22:50The attack now entered its most delicate phase.
22:54Every few meters demanded complete concentration.
22:57Navigation became slower still as the submarines searched for opportunities to pass obstacles without exposing themselves.
23:05Water currents continued to interfere with precise maneuvering,
23:08while limited visibility made identifying underwater hazards exceptionally difficult.
23:14Inside the X-6, there was little room for error.
23:18The crews monitored instruments, adjusted depth, compensated for changing conditions,
23:23and continually balanced caution against the need to keep moving.
23:27Spending too much time beneath the defenses increased the likelihood of discovery.
23:32Moving too quickly increased the risk of striking an obstacle or becoming trapped.
23:36German activity around the anchorage continued as normal.
23:40Sentries watched from the shoreline.
23:42Patrol craft moved through nearby waters.
23:45Crewmen aboard turpits carried out their daily routines,
23:49unaware that hostile submarines had penetrated far deeper into the defenses than anyone believed possible.
23:55Yet the margin separating success from failure had become almost impossibly small.
24:01A damaged control surface, an unexpected current, a careless movement,
24:06an alert sentry spotting an unusual wake.
24:09Any one of these could expose the attack before the charges were ever placed.
24:13By now, the mission no longer depended on elaborate planning carried out in Britain.
24:18It depended on the judgment of a few exhausted sailors operating almost entirely on instinct.
24:24Every decision had immediate consequences.
24:27Every minute increased both danger and opportunity.
24:31Somewhere directly ahead, beneath thousands of tons of armored steel,
24:35lay the point every surviving crew had spent months trying to reach.
24:39Now, they had to do something no submarine crew had ever attempted before.
24:43They had to place their explosive charges beneath one of the most powerful battleships in the world,
24:48knowing that discovery was no longer a possibility waiting somewhere in the future.
24:53It could happen with the very next movement.
24:55By the early hours of September 22nd, 1943,
25:00the surviving X-Craft had accomplished something few believed possible.
25:05After days of towing across the North Sea, mechanical failures, the loss of fellow crews,
25:11and a slow infiltration through the defenses of Altefjord,
25:14X-6 and X-7 were approaching the heart of the German anchorage.
25:18Somewhere ahead, lay Tirpitz.
25:21Finding the battleship was only the beginning.
25:24The real challenge was placing their submarines beneath her enormous hull without being discovered.
25:29Progress became painfully slow.
25:32The crews relied on careful, dead-reckoning compass bearings,
25:36occasional observations through the periscope,
25:39and the knowledge gained during months of preparation.
25:42Every movement of the controls had to be deliberate.
25:44Every correction for the current mattered.
25:47There was no room for sudden maneuvers beneath one of the largest warships ever built.
25:52Inside the tiny submarines, the pressure continued to mount.
25:56Carbon dioxide levels gradually rose.
25:59Battery power had to be conserved.
26:01Fatigue clouded concentration after days spent inside an environment never designed for comfort.
26:07At the same time, mechanical problems began appearing at exactly the wrong moment.
26:12X-6 experienced increasing difficulties maintaining precise control.
26:19What had begun as a carefully rehearsed operation was slowly becoming an exercise in adaptation.
26:26Time was also running short.
26:29The explosive charges relied on delayed action fuses.
26:32They needed to be placed, armed, and left behind,
26:35with enough time for the submarines to escape before detonation.
26:38Every unexpected delay reduced the chances of reaching open water again.
26:45German defenders, meanwhile, remained unaware that hostile submarines had penetrated so deeply into the anchorage.
26:52Patrol craft continued their routines.
26:54Sentries watched the surrounding shoreline.
26:56Crewmen aboard Turpitz carried on with another ordinary morning,
27:00never imagining that enemy sailors were already maneuvering beneath the ship.
27:05Eventually, the two attack submarines reached their objective.
27:08Instead of firing torpedoes, they carried the weapons that had defined operation source from the very beginning.
27:15Massive detachable side charges mounted externally along each side of the hull.
27:20One by one, the crews released them beneath Turpitz and activated the delayed timers.
27:25At that moment, the mission fundamentally changed.
27:29The attack itself was complete.
27:31Everything that followed depended on whether the explosives had been positioned correctly
27:36and whether the crews could escape.
27:38That proved far more difficult.
27:41By now, signs of unusual underwater activity had begun attracting German attention.
27:46Confusion spread across the anchorage as defenders searched for the source of the disturbance.
27:52X-6 suffered further mechanical failures that made a successful withdrawal increasingly unlikely.
27:58Unable to continue underwater, Lieutenant Donald Cameron eventually brought the submarine to the surface.
28:04Surrounded by overwhelming enemy forces, the crew abandoned the craft and were taken prisoner.
28:11X-7 attempted to fight her way back through the harbor, but the withdrawal proved equally dangerous.
28:16Damage and entanglement left the submarine struggling to escape.
28:20Most of her crew were eventually captured, while others did not survive the attempt to leave the fjord.
28:25Neither Cameron nor Basil Place could know whether their charges would function as intended.
28:30There was nothing left to do but wait.
28:34Sometime later, the silence inside Kofjord was shattered.
28:38The charges exploded beneath Turpitz.
28:40Powerful underwater shockwaves slammed into the battleship's underside,
28:44where water transmitted the force far more effectively than an explosion above the surface ever could.
28:50Steel plating buckled, internal supports twisted under the enormous pressure,
28:55machinery spaces were heavily damaged,
28:57and flooding spread through multiple compartments as seawater forced its way into the hull.
29:04Turpitz remained afloat.
29:05But remaining afloat was not the same as remaining operational.
29:09German damage-controlled teams moved quickly to stabilize the battleship and assess the destruction.
29:15Their work revealed extensive structural damage that could not be repaired quickly.
29:19The ship would require months of repairs before she could once again be considered ready for combat.
29:25That outcome was precisely what the Royal Navy had hoped to achieve.
29:30Operation Source did not sink Turpitz.
29:33Instead, it temporarily removed one of Germany's greatest naval threats from the strategic equation.
29:39For months, the battleship that had forced Britain to commit enormous naval resources against the mere possibility of her deployment
29:46was effectively out of action.
29:49Germany, meanwhile, had to devote valuable manpower, materials, and time to restoring a ship that had been crippled not by
29:56a fleet or an air raid,
29:58but by a handful of men inside miniature submarines.
30:01The victory came at a considerable cost.
30:05Several participants never returned.
30:07Others spent the remainder of the war in captivity after accomplishing one of the Royal Navy's most daring special operations.
30:15Yet the courage displayed during Operation Source received lasting recognition.
30:20Donald Cameron and Basil Place were both awarded the Victoria Cross,
30:24while many of their fellow participants were also decorated for their role in the mission.
30:29More importantly, Operation Source proved something few naval planners had fully appreciated before 1943.
30:38Even the strongest fortress could be vulnerable.
30:41Even the largest battleship could be reached.
30:43And sometimes, history was changed not by the biggest ships or the largest fleets,
30:49but by four men inside a submarine barely large enough to hold them.
30:54Operation Source did not destroy Turpitz,
30:56but it proved that even the most heavily defended warship in Europe could be reached.
31:02The damage kept the battleship out of action for months,
31:05easing the threat she posed to Allied Arctic convoys,
31:08while Germany devoted valuable time and resources to repairs.
31:12Although Turpitz eventually returned to service,
31:15she was finally destroyed by RAF Lancaster bombers in November 1944.
31:21Yet her story can never be told without remembering the men who first showed she was vulnerable.
31:26Operation Source became one of the Royal Navy's most remarkable special operations.
31:32It demonstrated that careful planning, innovative engineering, and extraordinary courage
31:37could achieve what larger fleets had failed to accomplish.
31:40The mission was never about matching Turpitz ship for ship.
31:44It was about proving that a handful of determined men could change the course of a naval campaign.