ENIGMA Transmissions from NAZI U-BOOTS in ANTARCTICA | British Bases at the South Pole
For 2 years, the movement goes unnoticed in London until March 1943.
That month, the information reaches the desk of Stuart Menses, head of MI6.
It comes from Bletchley Park, where Alan Turing’s team is deciphering naval Enigma traffic with increasing regularity.
Among the messages are communications between Hamburg and the German base in the Kgaran Islands in the southern Indian Ocean.
The content does not refer to convoys or submarine hunting.
It mentions [music] logistical preparations in extreme latitudes, verification of previously analyzed coordinates, and a specific deadline, full operational status [music] before the oustral winter of 1944.
The question for MI6 is immediate.
What was the nature of that operational capability? Analysts cross-reference [music] this data with reports from South America.
The result outlines a troubling pattern.
On May 1st, 1943, the Argentine transport Pimero Deio lands in the South Shetland Islands.
On board are 25 men from the Argentine Navy with construction materials, diesel generators, radio equipment, and ammunition.
It is not a [music] scientific expedition.
They remove a British plaque placed in 1908, throw it into the sea, and erect a permanent structure of wood and corrugated metal.
The Argentine flag is raised.
The detachment remains.
3 weeks later, Chile carries out an almost identical operation.
The transport Yelo arrives at Deception Island, removes British markers, and establishes the Arturo Pratt [music] Naval Base with a permanent garrison of 15 men.
Two South American countries establish a lasting presence in territory London considers its own.
For Great Britain, the implication is immediate.
The Falkland Islands lie just over 1,000 km to the north.
A consolidated Antarctic presence reinforces territorial claims that directly affect control of Cape Horn, the Straight of Mellan, and the only alternative route to the Pacific should the Panama Canal be compromised.
This is not a symbolic dispute.
It is a matter of global maritime [music] routes.
On June 8th, 1943, Churchill convenes an emergency meeting at the Admiral.
present are the first sea lord, the head of MI6, and naval intelligence officers specializing in the southern hemisphere.
The diagnosis is clear.
There are no military resources available for an open response.
Every escort is protecting convoys in the North Atlantic or routes to Murmansk.
There is no margin to dispatch a visible force to the other end of the planet.
The solution must be indirect.
Churchill does not seek a classic military operation, but plausible deniability, something that can be [music] presented as science if it fails, justified before parliament as lowcost oceanographic research, and at the same time possess real intervention capability if the situation deteriorates.
[music] Thus, operation Tabarin is born.
The name is a deliberate choice.
Tabarin refers to a Parisian cabaret associated with shifting identities [music] and discrete activities.
The mission will not appear in public budgets or parliamentary debates.
It will exist in the shadows.
Command falls to James Robert Maher, a 38-year-old marine zoologologist.
He is not a career officer.
At 18, he participated in Ernest Shackleton’s Quest expedition.
He spent two full winters in Antarctica and learned that on the ice, hierarchy weighs less than practical experience.
For Mar survival depends on rapid decisions, not manuals.
He selects a small team of 11 men, all veterans of polar exploration, geologists, meteorologists, radio operators, and a bilingual naval carpenter with direct knowledge of South America.
No professional soldiers, no officers accustomed to formal orders.
The assigned equipment follows [music] the same logic.
Two ships, the HMS William Scoresby, a converted steam whaler, displaces 630 tons [music] and reaches 8 knots.
Its reinforced wooden hull avoids magnetic mines and allows operation among ice where a steel hull would become trapped.
Beneath its civilian appearance, it conceals light armorament, explosives, and an encrypted radio system.
At first glance, it seems insignificant.
The second vessel, the Fitzroy, is a cargo schooner registered as a scientific transport.
It displays neither armament nor power.
In reality, it carries very low frequency equipment designed to [music] intercept submarine communications, a silent complement to the declared mission.
On November 14th, 1943, both ships depart Falmouth with an official destination of Port Stanley.
Funding comes from classified MI6 accounts.
There is no parliamentary notification.
To the outside world, it is just another scientific expedition.
The crossing is conducted in radio silence.
To traverse the South Atlantic without escort in the midst of submarine warfare is a calculated [music] gamble.
They avoid South American ports despite the region’s formal neutrality.
By late November, they cross the equator.
The lookout aboard the William Scoresby detects a [music] periscope 2 mi away.
There is no attack.
The object reappears hours later and disappears without contact.
The conclusion is unsettling.
It is not hunting.
It is observing.
[music] patrolling.
On January 26th, 1944, after 73 days at sea, the ships reach Port Locky.
The bay remains partially free of ice and preserves remnants of an abandoned whailing station.
Initial measurements reveal a clear thermal anomaly.
The water is warmer than expected, and temperature increases with depth.
There is no time to investigate.
Within two weeks, they establish base A with pre-fabricated structures, a diesel generator and a radio system capable of intercepting submarine transmissions.
On February 9th, the British flag is raised.
Eight men remain at the base.
Before departing, Mah receives an encrypted order from the Admiral to establish a second base on Deception Island.
The Antarctic Expedition and the German Cipher Code, February 1944.
The Antarctic summer reaches its peak.
24 hours of daylight above the Antarctic Circle and temperatures approaching 0° C along sheltered coasts.
It is the only window of the year to establish a permanent base before winter seals the sea with continuous ice, cuts off navigation routes, and turns any construction effort into an impossible gamble.
The Admiral’s order leaves no room for ambiguity.
Base B on Deception Island, highest priority.
confirmed Chilean presence.
Proceed with caution.
Mah understands the logic immediately.
Port Lockroy serves as a British anchor on the Antarctic Peninsula.
But deception is something else entirely.
A natural harbor of exceptional quality, protected from heavy seas with a narrow entrance and an interior where a ship can disappear from view.
If anyone were operating in secrecy at the southern extreme, this would be an obvious candidate.
The William Scoresby set sail on February 12th toward Deception Island.
The straight line distance is 148 km to the southwest.
On nautical charts, it appears to be a short hop.
In reality, the voyage becomes a sequence of small decisions, controlled speed, doubled lookouts, constant course corrections, and one overriding principle that Mah repeats on deck.
There is no quick rescue in these waters.
The journey takes three days.
The crew barely rests.
On every watch, their eyes grow accustomed to detecting the slightest variations in the sea’s texture.
A different sheen may be a sheet of ice just below the surface.
An irregular shadow may be the back of a partially submerged iceberg.
The reinforced wooden hull provides reassurance, but it also demands discipline.
Any impact, no matter how minor it seems, can open a leak that in winter becomes a death sentence.
On February 15th, the William Scoresby reaches the only entrance to Deception, Neptune’s [music] Bellows.
The passage is 230 m wide.
It is a channel where currents turn violent and funneling winds can reach 60 km per hour, even on seemingly calm days.
This is no [music] place to delegate.
Mah takes the helm himself and keeps the ship aligned with obsessive precision.
An error of 5 m would mean smashing the hull against volcanic rock.
The crossing of Neptune’s bellows is brief, but it defines everything that follows.
The moment the ship clears the narrow passage and enters the flooded caldera, the world changes.
Calm water, almost no wind, silence.
Before them lies a nearly perfect circular bay, 11 km in diameter, as if the ocean had been trapped within a ring of stone.
For a crew accustomed to operating with the open sea as a constant threat, this sheltered interior feels unreal.
Deception Island is a flooded volcanic caldera.
The last major recorded eruption was in 1842, but the volcano is not dead.
It is dormant and the terrain reveals it without [music] the need for sophisticated instruments.
Near Whalers Bay, columns of steam rise from the black sand.
Back records temperatures that do not match a normal Antarctic coastline.
Sea water in certain spots boils with readings of 68°.
Just 20 m inland, there are thermal pools at 42° while the outside air remains polar.
Back wants to know whether the phenomenon is limited to the surface or if a deeper system exists.
He conducts test dives with light [music] equipment, always maintaining a strict safety margin.
At 5 m depth, he finds confirmation of his suspicions.
Underwater fummeralss expelling hot water.
The rising column measures 82°, [music] enough to cause burns if skin is exposed too long.
The evidence leaves no doubt.
The heat is not a surface anomaly.
It comes from the island’s interior.
Then an even stranger detail emerges.
The salinity of the water near the fummeralss is abnormally low.
Back interprets the data.
This is not merely seaater heated by rock.
Fresh groundwater is mixing into the flow.
That implies internal circulation.
glacial meltwater filtering downward, heating through residual magmatic activity and returning to the surface through volcanic fissures.
A complete hydrothermal system operating on an Antarctic island.
In practical terms, Deception Island has natural heating, constant and available year round.
Mah quickly sees the next step.
In the Antarctic winter, sea ice is usually the great lock.
But a calera with thermal activity can maintain areas of open water or at minimum zones where the ice does not form as quickly or as solidly.
A submarine could take refuge inside, operate under cover, and avoid becoming trapped.
The volcanic ring itself reduces exposure and limits lines of sight from the outside.
In an environment where reconnaissance depends on brief windows of visibility, Deception Island offers natural concealment.
Mah drafts a coded [music] report to the admiral ty direct and unambiguous ideal location for a permanent submarine base natural protection yearround maritime access thermal capacity for maintenance operations.
The response [music] arrives 2 weeks later and sets the official tone of operation tabin.
Continue passive observation.
Do not confront Chilean presence.
Priority is to establish permanent monitoring capability.
That order carries a dual meaning.
The first is diplomatic.
London does not want an incident with Chile.
The second is military.
If enemy activity exists, the objective is not to reveal themselves, but to listen, record, and build a file that will allow action based on complete intelligence.
[music] But inside the Calera, there is a problem.
The Chilean presence is not a temporary scientific station.
It is a military base.
The Arturo Pratt Naval Base occupies the northern end of the Calera.
It features a main structure of concrete and wood, four buildings capable of housing 15 men, a 25 m radio antenna, and a mast flying the Chilean flag.
The installation is designed to last.
It also includes two 57 mm Nordonfelt naval guns, functional weapons with ammunition stored in a protected bunker.
When Mah arrived on February 17th, 1944, he immediately understood that he was facing an established military presence, not a scientific [music] expedition.
The Chilean commander, First Lieutenant Jaime Costa, cited the presidential decree of November 1940, establishing Chilean sovereignty between the Meridians.
Mah replied with the British claim over the Falkland Islands dependencies which according to British administrative charts encompassed the entire Antarctic Peninsula.
London could not afford to open a diplomatic crisis in the southern hemisphere while Europe absorbed every ship, every liter of fuel and every critical political decision.
Chile for its part lacked the naval capacity to confront the British Navy in [music] Antarctic waters without external support.
The territorial dispute halted when Costa posed a different question whether Mah was as concerned about German submarines as he was.
The shift in tone was deliberate.
Costa mentioned two documented sightings.
Periscopes observed less than 5 km from the coast in December 1943 and January 1944.
Both disappearing before photographic confirmation could be obtained.
The observed characteristics did not match American or British vessels [music] according to known profiles.
More significant still, 3 weeks earlier, Chilean operators had intercepted a brief radio signal on an unidentified frequency without the capacity for precise triangulation using available equipment originating from the southern sector from deep within [music] the continental interior where no known human settlements or documented bases of any nationality existed.
Mah assessed the information in seconds.
If Costa was sharing operational data without explicit authorization from Santiago, it was because the perceived threat outweighed normal diplomatic considerations.
He proposed a tacit agreement without formal documentation.
[music] The British would build base B at the southern end of the Calera.
The Chileans would maintain their installation in the northern sector.
The two flags would continue flying without mutual [music] recognition of sovereignty.
But both stations would share all information regarding unidentified submarine activity in surrounding waters.
The common objective justified operational cooperation to determine [music] precisely who was operating in those waters and what activities were being conducted.
Coster accepted with an unspoken condition they both understood.
If Santiago inquired about cooperation with the British, the conversation had never taken place.
Mah responded in identical code.
If London asked about coordination with Chile, there would be no record.
The agreement was sealed without signatures, without witnesses, without protocol, only immediate tactical necessity.
On February 20th, 1944, the British began accelerated construction of base B at the southern end of the volcanic calera, exactly 200 m from the Chilean installation.
two national flags, two standing territorial claims, zero armed confrontation.
To outside observers, it might appear to be a symbolic exercise in presence without practical consequences.
For Ma, it represented a decisive strategic move because Tabarin’s real mission was to install permanent radio listening capability over the darkest sector of the Antarctic Peninsula.
Geometry was essential.
Port Lockroy and Deception, separated by 148 km of open sea, functioned operationally as two fixed points in a radio direction finding triangulation system.
With both stations operating simultaneously, any radio signal detected by one could be cross referenced with the bearing from the other to establish an approximate point of origin within an area covering the entire western Antarctic [music] Peninsula and the northern sector of the Wedel Sea.
The operational objective was not to intercept the content of encrypted conversations or decipher coded messages in real time.
That task belonged to Bletchley Park with specialized equipment and personnel trained in crypt analysis.
Tabarin’s objective was to detect presence to confirm whether submarines were operating in the region, whether land-based radio transmitters were functioning, and whether anyone was conducting organized activity in a zone where, in theory, no human presence should exist during the Antarctic winter.
The mere detection of an intentional signal on known German military frequencies [music] constituted intelligence of high value, regardless of the ability to decrypt its content.
On February 23rd, Base B became officially operational with [music] full equipment installed and calibrated.
Six men remained as permanent staff.
Radio operators began monitoring known German submarine frequencies around the clock.
The receivers stayed [music] on continuously.
Any intentional pulse was automatically logged with exact start time, precise duration in seconds, and frequency in kilohertz.
protocol required each detection to be entered clearly in the log book, verified by a second listening when possible, and preserved on magnetic tape if it lasted more than 5 seconds.
For nearly 2 months between February 23rd and April 11th, 1944, no anomalous activity was recorded.
The monitored frequencies remained silent except for normal atmospheric interference caused by magnetic storms or natural electrical discharges.
The prolonged silence suggested two possibilities.
Either no enemy activity existed in the region or the existing activity maintained extremely strict emission discipline.
On April 12th, 1944, exactly at 3:00 a.
m.
, [music] Port Lockroy detected a signal that changed the situation.
Thomas Bry was on the night watch.
The main receiver emitted a characteristic pulse that Barry immediately identified as a deliberate [music] human signal, not random noise.
He verified equipment calibration, ruled out technical malfunction, fine-tuned the frequency for maximum clarity, and began full recording in accordance with established protocol.
Exact frequency 62 kohertz.
This frequency fell within the VLF band, very low frequency.
Such frequencies had specific characteristics that made them useful for submarine communication.
Low-frequency waves could penetrate seawater to depths of 10 to 20 meters, allowing a submerged submarine to receive messages without surfacing or exposing an antenna.
The trade-off was that they required large transmitting antennas and high electrical consumption, limiting their use to fixed land installations or surface vessels with powerful generators.
Total duration 3.
8 seconds of continuous transmission.
The brevity suggested a highly compressed message or a synchronization signal intended to establish contact without revealing extensive [music] content.
Base B triangulated simultaneously from Deception Island using standardized procedure.
The duty operator at Deception, James [music] Crombi, also detected the signal and recorded the magnetic bearing from his position.
The lines intersected in a zone approximately 350 km southsoutheast of Port Lockroy with estimated coordinates of 68° south latitude and 57° west longitude deep within the continental interior, a region with no documented human presence or known installations.
The intersection point lay within solid continental ice at an average elevation above 1,000 m above sea level.
There was no accessible navigable coastline.
Ice cliffs over 100 m high dropped vertically into permanently frozen sea.
No conventional ship could approach [music] without extreme risk of being trapped by drifting ice.
No aircraft available in 1944 could land under extreme polar conditions on unprepared surfaces, especially during Antarctic autumn when temperatures were already descending toward -40° and weather [music] conditions deteriorated rapidly.
And yet someone was deliberately transmitting radio signals from [music] a location considered inaccessible by conventional means.
Barry proceeded with detailed technical analysis of the recorded signal following signals intelligence [music] protocols.
He detected no voice modulation upon auditory inspection or waveform analysis.
He found no patterns compatible with spoken communication encoded by known systems.
The individual pulses [music] were excessively regular with mathematically precise intervals that ruled out manual Morse keying.
It was automatic code generated by a mechanical transmission device.
Barry conducted an exact count through analysis of the recording.
32 individual pulses distributed over 3.
8 seconds of total emission.
That specific [music] cadence was fully compatible with the operational speed of German mechanical encryption equipment of the Enigma type adapted for automated radio transmission.
Known German naval Enigma systems typically operated between 8 and 10 pulses per second when transmitting via automatic device, a speed that balanced rapid transmission with reliability under difficult propagation conditions.
If that specific technical pattern did indeed correspond to German origin equipment operating in Antarctic territory, then considerable support infrastructure was necessarily present.
Stable electrical supply via generators or high-capacity batteries, trained operators in encryption and transmission procedures, and technical maintenance capability for complex electromechanical equipment in extreme polar conditions.
It was an operational point with permanent infrastructure and sustained communication capacity.
The complete technical analysis was sent to the British Admiral Ty via scheduled coded message through Port Stanley.
The official response took exactly 11 days to arrive from London, including naval intelligence processing, consultation with specialized [music] sections, and formulation of operational instructions.
When it finally arrived, the message was extraordinarily cold.
Continue uninterrupted monitoring.
Record absolutely all transmissions regardless of duration or apparent content.
Do not attempt physical investigation of the origin under any circumstances.
Do not transmit detailed technical analysis over open [music] radio.
Even using standard encryption systems considered secure.
The explicit order not to physically investigate the source represented strict control of classified information and risk assessment.
certain material was considered too sensitive [music] to risk in radio transmission under any circumstances even using higher level encryption systems.
The reason was technical and wellfounded.
British intelligence services had known since 1940 that Germany had succeeded in deciphering several allied encryption systems through captured material, cryptographic analysis and operational errors.
The possibility that communications regarding detection of a German base in Antarctica could be intercepted and decrypted by the enemy posed an unacceptable risk that [music] could compromise the entire Tabarin operation and alert the Germans that their presence had been discovered.
During the following 5 months between April and September 1944, the two British [music] bases recorded 19 additional radio signals, all originating from the same approximate geographic region.
according to repeated triangulation all on known German submarine communication frequencies within the same band.
The consistency of the pattern indicated organized and sustained [music] activity.
An even more significant operational detail emerged, confirming the presence of a permanent installation with established [music] procedures.
The signals did not occur randomly throughout the 24-hour day.
Instead, they were systematically concentrated in specific and predictable time windows.
Barry arranged all accumulated records chronologically and conducted basic statistical analysis through manual tabulation.
He detected a perfectly clear repetitive pattern.
Transmissions occurred predominantly between 2:00 a.
m.
and 4:00 a.
m.
or alternatively [music] between 2:00 p.
m.
and 400 p.
m.
using Port Lockroy local time as reference.
No transmissions were recorded continuously throughout the night.
None occurred throughout the entire day.
The concentration within specific windows was statistically significant and ruled out coincidence.
This time pattern did not match the expected operational behavior of a submarine in navigation, transmitting occasional signals based on immediate tactical need or following scheduled contact with naval command.
A submarine on patrol would have incentives to vary transmission times to complicate enemy detection and would limit emissions to the absolute minimum necessary to reduce [music] exposure.
The observed pattern strongly suggested operational behavior consistent with a fixed land installation working according to pres-scheduled [music] transmission windows and able to afford longer emissions because it did not face immediate risk of counterattack.
Back proposed a practical technical explanation based on known logistical constraints of operating in extreme polar conditions.
If the installation’s primary strategic objective was to remain completely hidden from visual detection by enemy forces, generator ventilation would only be conducted when weather conditions provided natural cover, dense fog, active snowfall or low cloud ceilings that reduced horizontal visibility, bur cross- refferenced transmission records with preserved meteorological data and confirmed a [music] statistically significant correlation.
Radio transmissions tended to coincide with documented periods of low atmospheric visibility in the estimated [music] geographic area of origin based on weather reports from B and observations by Allied reconnaissance pilots when available.
On June 23rd, 1944, in the heart of Antarctic winter, when temperatures at Port Lroy had dropped to minus 35° and darkness was nearly continuous, Port Lroy recorded the longest transmission detected to date, 9 minutes and 32 seconds of uninterrupted emission.
It was not a brief synchronization burst.
It was a complete transmission of extensive content.
Barry calculated the approximate volume.
If each letter of the alphabet was encoded using a five pulse sequence according to the standard known German cipher system, it equated to a message of approximately 915 letters.
The volume of transmitted data suggested high operational value content, extensive orders, detailed situation reports, [music] logistical supply lists, and tactical planning information.
Barry activated full recording on magnetic tape, verified the quality of the record, and preserved it in a sealed container.
He did not attempt local decryption, [music] lacking technical capacity, trained crypalytic personnel, and access to captured German code books.
The tape was sent aboard the next supply ship that arrived in October [music] directly to naval intelligence in London, where it was processed and immediately forwarded to Bletchley Park for specialized cryptographic analysis.
Barry never received information regarding the decrypted [music] content of the message.
Bletchley Park did not share decryption results with field operational bases due [music] to strict compartmentalization of classified information.
On October 16th, 1944, when the William Scoresby returned to Port Lockroy with supplies for the second winter, Mah received a coded envelope containing new operational instructions.
He read the contents in private.
That night, he convened an urgent meeting with the radio operators and added an additional instruction to the existing [music] listening protocol.
From that moment on, in addition to continuing monitoring of German frequencies, [music] they were to monitor Argentine and Chilean naval communications on known frequencies used by those count’s [music] navies.
The Admiral T wanted to determine whether coordination or contact existed between Latin American naval forces and [music] the detected German presence.
The instruction raised an implicit and troubling question.
Someone else was not a documented neutral country in the official record.
It was the possibility of a third presence actively collaborating with German operations at [music] extreme latitudes.
If sustained German activity existed in the Antarctic continental interior during an extended period that included the polar winter, it required continuous supply.
All that material had to arrive from outside via a ship or submarine.
capable of navigating Antarctic waters and approaching an unloading point without detection by Allied patrols.
The Admiral’s suspicion, indirectly formulated through the expanded monitoring instruction, [music] was that Argentina or Chile might be providing logistical support to German operations, whether through active government collaboration, corruption of individual naval officers, [music] or the use of commercial ports by neutral flagged vessels actually transporting supplies intended for clandestine German bases.
Both Argentina and Chile maintained diplomatic relations with Germany until late in the war, had significant German immigrant communities with sympathies toward the Nazi regime, and had shown reluctance to fully cooperate with Allied war efforts.
Tabarin had achieved its initial objective to confirm through solid technical evidence that operational German presence existed in Antarctica.
The 20 transmissions recorded over 5 months, all from the Continental Interior considered inaccessible, all on known German military frequencies, compatible with German mechanical encryption equipment, constituted conclusive proof of a permanent installation with considerable infrastructure and sustained communication capability.
How did the Germans come to have an operational installation in Antarctica? To understand how the Germans were operating a facility in Antarctica in 1944, we need to go back 6 years.
In December 1938, as Hitler [music] had just annexed Austria and was preparing the invasion of Poland, the Third Reich launched the [music] most ambitious Polar expedition in its history.
German naval strategists understood that if war spread, Great Britain would [music] blockade Europe by controlling the North Atlantic and the Mediterranean.
Germany would need alternative supply routes, refueling ports beyond the reach of the Royal Navy, and safe havens where raiders and submarines could repair without being intercepted.
The only place on the planet completely [music] outside British control in 1938 was Antarctica.
No European power had a permanent presence there.
No navy patrolled those waters.
On December 17th, 1938, the cargo ship Schwabanland departed Hamburg under the Lufansza flag, but with a crew that included Creeks Marine officers following the direct orders of Reichkes Marshall Herman Guring.
On board were 57 men, two Dornier sea planes, and highresolution aerial cameras.
The commander was Alfred Richer, a naval officer with Arctic experience.
The true objective was to find suitable locations for a permanent German base in the southern hemisphere.
The Schwaban land sailed for 39 days, crossing the Atlantic and rounding the Cape of Good Hope.
On January 19th, 1939, [music] it reached the target coordinates off the coast of Queen Mor land.
Richer immediately launched the Dornier aircraft on their first photographic reconnaissance mission.
The planes flew at 300 m, while the cameras captured overlapping images every [music] 3 seconds.
What they photographed contradicted everything Antarctic geologists believed they knew about the continent.
Queen Morde land was not a uniform plane of ice.
It was a landscape of full mountain ranges, chains rising 3,000 m above the ice with valleys between them where the ice was less than 100 m thick.
In some places, there was exposed rock completely free of ice.
The interior of Antarctica stands at 3,000 m above sea level with an average temperature of -50° where the ice should be kilome thick everywhere.
The photographs revealed areas where the ice was thinning from below as if something were melting it from within the continent itself.
The expedition’s geologists led by Ernst Herman analyzed the images and reached a conclusion.
subsurface geothermal activity, not active volcanism with eruptions, but residual thermal flow from the Earth’s mantle, hot spots beneath the ice where geological heat was sufficient to maintain liquid water under conditions where it should have been frozen.
Herman drafted a 47page technical report whose final conclusion had immediate operational implications.
The identified zones present favorable conditions for the establishment of permanent [music] installations.
Estimated subsurface temperature between 5 and 20° C at depths of 50 to 200 m.
Access by direct excavation feasible with standard industrial equipment.
The geology [music] provided natural heat.
It was possible to live beneath the Antarctic ice without complex heating systems.
All that was required was to excavate down to the thermal zones and establish habitats protected from the surface [music] polar winds.
Over 7 weeks, the Dornier aircraft flew 11 reconnaissance missions covering 350,000 km and capturing 11,700 photographs.
The region was officially named Noishwabanand, New Suabia, a territory the size of Germany formerly claimed for the Third Reich.
On April 6th, 1939, the Schwabanand returned to Hamburg.
The maps, photographs, and geological data were delivered to the naval high command.
Officially, the expedition ended there.
Richard’s classified report contained elements that were never published.
Page 123, section, anomalous observations during aerial reconnaissance, recorded a specific note.
During the January 26th mission, the SE plane Bereus reported an atypical [music] cloud formation.
Evidence that Germany had done more than simply map the region surfaced [music] in March 1941 when the heavy cruiser HMS Cornwall captured the German raider Penguin in the Indian Ocean.
Among the confiscated documents were Norwegian nautical charts of Antarctica with handwritten annotations in German dated between 1939 and 1940.
Someone had updated those [music] maps after the Schwabanand expedition.
The annotations marked the same thermal zones Richer had photographed, but added specific operational information.
Zone alpha, access via fjord at 70° south, sea ice stable until March.
Minimum depth 40 m, feasible for type 9 submarines.
Zone beta, glacial valley with exposed rock.
Coordinates 70° south, gentle slope, possible aircraft landing with skis.
Zone gamma 3 km thermal fisher water temperature plus 15° natural ventilation verified.
The word verified indicated a subsequent physical inspection.
There was no record of any official German expedition to Antarctica between 1939 and 1941.
The marine operated raiders in the South Atlantic [music] during that period.
Penguin, Atlantis, Comet, Coran, armed ships disguised as merchant vessels that attacked Allied shipping far from protected routes.
British intelligence obtained a relevant clue in November 1941 when the cruiser HMS Devincure sank the Raider Atlantis off the coast of [music] Brazil.
Survivors rescued by the submarine U126 were interrogated in Jibralta.
During questioning, several crew members mentioned that Atlantis had made a stopover in extreme southern latitudes for resupply.
They specified fresh water because the desalination plant was malfunctioning.
They had found portable water on a southern coast with freshwater glaciers.
When Operation [music] Tabarin detected transmissions from the Antarctic continental interior in 1944, those testimonies took on a different meaning.
If the Germans had established supply depots using raiders as transport, those depots [music] remained available.
In November 1944, the transmissions Tabarin had recorded once or twice a week for 7 months changed pattern.
They began occurring daily, sometimes twice a day, lasting up to 20 [music] minutes.
Radio traffic volume had multiplied by a factor of five in less than 2 weeks.
On November 19th, Chilean Commander Costa sent an urgent message to base B.
[music] submarine cited 10 km southeast on the surface for 4 minutes type unidentified.
2 days later on November 21st, the Chilean base cited [music] a second submarine in the same area.
This time they achieved identification, a profile consistent with a German type 7 Cubot.
The identification raised an immediate operational question.
Why was Germany wasting a submarine by sending it to Antarctica in November 1944? By that point, the Normandy landings had taken place in June.
The Allies were in Belgium.
The Soviets had liberated Poland, and Berlin would be encircled within months.
The Cres Marine was losing five submarines per week.
On November 26th, Port Lockroy detected a different transmission.
Barry identified the German language and recorded the entire content.
Position confirmed, cargo transferred, returning to homeport within 48 hours.
Fuel sufficient, weather favorable.
Barry attempted triangulation, but the signal was too brief [music] to determine distance accurately.
So he sent the recording to the Admiral Ty on the next supply ship.
The response arrived in January 1945, confirming the naval intelligence assessment, accent consistent with a Baltic hubot crew, content suggesting a cargo or personnel transfer operation, and orders to continue monitoring with maximum priority.
In February 1945, the transmissions abruptly stopped with [music] no signals recorded for three full weeks, an anomaly after 9 months of nearperfect regularity.
On February 22nd, Barry detected an Enigma transmission lasting 13 continuous minutes, which at standard speed represented approximately 6,500 characters of information.
Barry recorded the entire signal on magnetic tape and sent it to London on the next ship.
The Admiral’s response arrived 3 months later in May 1945 with a partial decryption carried out by Bletchley Park stating the following.
Evacuation orders for personnel from an unspecified Antarctic installation destination towards South American ports.
Deadline May 1945.
Absolute priority on the destruction of classified documents and preservation of high value equipment.
What happened to the Nazi submarines after the surrender and what were they transporting? 3 months later, two German submarines appeared in Argentine waters.
U530 arrived in Mardell Plata on July 10th, 1945, 2 months after the German surrender of May 8th, 1945.
Commander Otto Vermouth stated that he had departed from Keel on February 19th.
U 977 arrived on August 17th, 1945.
Commander Hines Sheffer declared that he had sailed from Norway in May.
Both submarines arrived with their full crews, but without torpedoes, without ammunition, and with provisions nearly exhausted.
The Argentine authorities interned them, but did not allow a full inspection by Allied intelligence until months later.
When inspections were finally carried out, the submarines had been stripped of all documentation and equipment.
Interrogations of the crew members produced no conclusive information.
Wermoth and Sheffer stated that they had sailed directly from European ports without stopping in the southern hemisphere.
An analysis of fuel consumption and provisions conducted by Allied naval intelligence [music] determined that both submarines had made at least one prolonged stop at an undisclosed location during their Atlantic transit.
The crews statements contained inconsistencies regarding dates and positions that were never resolved.
British intelligence [music] cross-cheed the dates with Tabarin’s records.
The Enigma transmission of February 22nd, 1945 occurred when U530 claimed to have departed Europe.
The arrival of both submarines in Argentina in July and August matched the May deadline specified in the decrypted transmission.
Schwabanland’s 1939 maps had identified habitable thermal zones.
The maps captured from Penguin in 1941 bore the annotation verified.
The transmissions detected by Tabarin between April 1944 and February 1945 originated from those coordinates.
The February 1945 transmission ordered evacuation to South American ports.
The submarines U530 and U977 arrived in Argentina.
But those two submarines were not the only ones.
On May 9th, 1945, one day after the official German surrender, the listening station at Port Lockroy recorded a brief transmission from the South Atlantic.
Barry noted it in the log.
The date was significant.
The surrender had come into effect at 11:00 on May 8th.
The Port Locky transmission was recorded at 2:00 a.
m.
on May 9th.
Less than 15 hours after the official sessation of hostilities, someone was still transmitting from southern hemisphere waters using German frequencies and equipment.
2 weeks later, on May 19th, 1945, [music] the submarine U234 surfaced off the coast of the United States and surrendered to the destroyer Sutton.
It was a transport submarine specifically designed for longrange missions with a cargo capacity of 252 tons.
It had departed from Keel on April [music] 15th with a declared destination of Japan.
Carrying advanced German military technology, reactor [music] blueprints, samples of rocket fuel, guidance system components, and 560 kg of uranium oxide packaged in lead containers.
On board were two Japanese officers, Commander Hideio Tomaga and Lieutenant Commander Shoji Genzo, both naval engineers assigned to receive the cargo in Japan.
When U234’s commander, Yan Hinrich Failer, received the surrender order on May 8th, he informed the Japanese officers that he would sail to a United States port.
Tomminaga and Jenzo locked themselves in [music] their cabins.
The following day, May 10th, both were found dead.
They had ingested [music] Luminol, a compound used in torpedo mechanisms that causes death by poisoning in approximately 2 hours.
Their bodies were committed to the sea with full military honors before U234 reached a United States port.
When naval intelligence interrogated failure about the mission’s final destination, the commander stated that [music] the original orders specified delivery of cargo to Japanese port via the Cape route, referring to the [music] Cape of Good Hope, not Cape Horn.
The Cape route implied navigation through South Atlantic waters, passing relatively close to the Antarctic coast before turning toward the Indian Ocean.
An analysis of U234’s fuel consumption conducted by United States naval technicians revealed a significant discrepancy.
The submarine had consumed approximately 180 tons [music] of diesel since departing Keel.
Yet the distance traveled to the point of surrender justified a consumption of only 145 tons.
35 tons of diesel were unaccounted for [music] with no documentary explanation.
Failure stated that the additional consumption was due to zigzag navigation to evade detection, but interrogators considered the explanation insufficient.
Allied intelligence identified five other German submarines that departed European ports in March and April 1945 and never reached a [music] known destination nor surrendered at an allied port.
U465 which sailed from Norway on April 2nd, U518 which left Keel on April 22nd and U880 which departed Bergen on May 5th.
Records from the German Naval High Command captured in Fenceburg showed that all five had received orders for navigation toward coordinates specified in Directive Valkyrie South before central communications collapsed.
Directive Valkyrie South was never found in the captured archives, but subsequent interrogations of Marine liaison officers revealed fragments.
Captain Wilhelm Meer, arrested in Hamburg in June 1945, stated under interrogation that Valkyrie South was an evacuation protocol for technical personnel to reserve facilities at unspecified latitudes in the southern hemisphere in the event of the Reich’s [music] collapse.
Meer did not know the exact coordinates, but confirmed that at least three longrange submarines had been designated for an extraction mission in March 1945.
British intelligence files cross-referenced that information with Tabarin’s records.
The sudden increase in transmissions in November 1944 had begun precisely when the first drafts of Valkyrie South were circulating among the Naval High Command.
According to captured documents, the evacuation transmission of February 22nd, 1945 coincided with the date Meer stated the protocol’s operational phase had been activated.
Submarine sightings reported by the Chilean base in November 1944 corresponded with time windows during which transport submarines could have carried out personnel or material transfers.
How did the Germans know where to establish themselves on an unexplored continent? In 1938, when the Schwaban land set sail for Antarctica, the continent remained largely uncharted territory.
There were imprecise coastal maps based on sightings from ships, but no one had mapped the interior with operational detail.
Richer’s expedition sailed directly to specific [music] coordinates in Queen Morde land as if it already knew what it would find there.
Confirmation that those areas were operationally accessible came 2 years later in January 1941 when the Raider Penguin captured the Norwegian Whailing Fleet and Crudder seized maps marking the exact same locations that Schwabanand had photographed.
The Norwegian whailing maps were unique.
Norwegian fleets had operated continuously in Antarctic waters since 1905, accumulating 36 years of observations [music] that no scientific expedition could match.
Whailing captains were not searching for geography.
They were searching for whales.
And whales migrated toward waters with specific temperatures, areas where warm currents kept the sea liquid even in the middle of the Antarctic winter.
The maps marked these zones as warm waters or preferred hunting areas.
They included notes on bays that never fully froze, anomalous thermal [music] currents, navigable access routes sheltered from prevailing winds, and water temperatures measured at specific locations during different months of the year.
It was operational knowledge accumulated through [music] repeated direct observation, not through isolated expeditions.
When British intelligence captured the penguin two months later in March 1941, they found among the seized documents Norwegian nautical charts of Antarctica with handwritten annotations in German.
The annotations marked the same areas that Schwabanland had photographed in 1939, but added information that could only have come from whailing expertise.
minimum depths for submarine navigation, seasonal sea ice stability, and [music] water temperatures verified through direct measurement.
The German raiders operating in the South Atlantic between 1939 and 1941 were not only attacking Allied shipping, they were also verifying geographic information that Germany had obtained from Norwegian sources.
The Norwegian government in exile operating from London after the German invasion of 1940 fully cooperated with British intelligence.
King Hucken IIIth and his government provided access [music] to the archives of Norwegian whailing companies, copies of nautical charts similar to those seized by Cruda, and testimony from whailing captains about the anomalous zones they had observed during decades of Antarctic operations.
James Maher had worked with Norwegian Whalers in the 1920s.
He personally knew several captains [music] whose fleets had been captured by the Penguin.
When the British Admiral Ty planned Operation Tabarin in 1943, Norwegian intelligence provided critical information on which specific locations should be monitored.
The selection of Port Lockroy as the site for base A was [music] not random.
It was a direct recommendation based on whailing charts that identified the bay as an area with a permanent thermal anomaly.
British intelligence cross referenced the maps captured from the penguin with the Norwegian copies available and with the reports [music] from the Schwabanland expedition.
All three sources aligned.
The thermal zones that Herman had identified through aerial photography in 1939 were the same hot zones that Norwegian whalers had marked on their maps since 1905.
Whale oil was a critical industrial resource for Germany.
Before the war, Germany imported 200,000 tons annually used to produce aviation lubricants that functioned at low temperatures, glycerin as a base for industrial explosives, and greases for hydraulic systems in tanks and aircraft.
The British blockade cut off that supply in 1939.
Capturing the Norwegian fleet in 1941 not only provided immediate whale oil production, it also provided the maps that showed where the fleets operated, how they navigated Antarctic waters, and where the highest concentrations of [music] whales were located.
