Nova (1974–…): Season 42, Episode 9 - Nazi Attack on America - full transcript
Following the attack on Pearl Harbor German seizes the opportunity to attack cargo ships along the United State East coast while the United States is unprepared. This program describes the scope of the German assault as a backdrop...
January 1942
America is just weeks
into World War II
when the European fight
comes to our shores
Hitler's U-boats waste no time
going on the attack
They brought the war to us
in a way that caught us
by surprise
The attacks are devastating
Thousands of lives lost,
more ships sunk
than at Pearl Harbor,
and Nazi spies secretly
delivered to American soil
They kicked our asses,
and yet we were getting
no payback
A lot of Americans
have forgotten
how close the war came
to our shores
and how close it was
to our homes
Now renowned explorer
Robert Ballard and his team
are returning
to this forgotten battlefield
with the latest technology
Okay team, 100 meters
Here, we're able
to get a picture
that shows you
what it would like
if you could take the water away
Their work will help rewrite
this chapter of World War II
and bring closure to
a 73-year-old mystery:
who sank German U-boat U-166?
How close did the Nazis come
to victory in the Atlantic?
Right now, on this NOVA/
National Geographic special
The Gulf of Mexico, 120 miles
off the coast of New Orleans
These peaceful waters
were once the setting
for a violent, little-known
chapter of World War II
Deep below the surface
lie the remnants
of a devastating Nazi attack
on America: Operation Drumbeat
Just after the US entered
World War II,
Hitler's submarines,
the deadly U-boats,
struck hard and fast
up and down the East Coast
They hunted down and sank
the vulnerable cargo ships
that were critical
to the Allied war effort
And they took the war further,
extending their assault
all the way
into the Gulf of Mexico
Now, explorer Robert Ballard
and his crew
prepare to investigate
this battlefield
To reach the sea floor,
they'll use high-tech remotely
operated vehicles... ROVs
The beauty of the ROVs,
these vehicles can stay down
for days and days and days
Square up on the target
and drive over to it
The ROVs descend one mile
beneath the surface,
where the casualties
of the Nazi assault still rest
A World War II-era cargo ship,
the Alcoa Puritan
In 1942, she hauled aluminum ore
vital to America's
wartime factories
Her scars are still vivid
That's a hole,
that's a shell hole
So if you could stop laterally
and go in and frame that
These are bent inward
Yeah, you can tell it went in
Yep
Joining Ballard is wreck diver
Richie Kohler
He's spent decades studying
and diving on sunken U-boats
This wreck is a snapshot
of when the U-boats
first came to America
This is when the U-boats
were not afraid of us
We hadn't got our act together
Not far from the Alcoa,
an oil tanker, the SS Gulf Penn,
90,000 barrels of oil
still trapped inside
These are in some ways
ticking time bombs
in the sense that the
hull will rupture
and you'll have oil come out
Could you look at that wreckage?
Could you look at the wreckage
before you go too far?
But Ballard and Kohler's
ultimate goal
is a pair of shipwrecks
resting not far away,
one the hunter, the other hunted
This is the SS Robert E. Lee,
the victim
In 1942,
407 souls walked these decks
On board the Robert E. Lee
was not only passengers,
but there were actually
survivors
from previous
German U-Boat sinkings
that occurred out
in the Atlantic Ocean
Square on the gun
a little better
A three-inch deck gun
had been added for protection
against the U-boat threat
This gun never went into play
They never had a target
He's locked up,
he's in a stored position
The attack came
with almost no warning
You could almost imagine them
standing along the side
looking at what they thought
was a porpoise
and then it makes a turn
and comes into them
It's actually a torpedo
Today, the fatal wound
inflicted by the German torpedo
is hidden beneath layers of silt
on the ocean floor
It's amazing that most
of the damage is not visible
Now, we're looking
at a ghost ship
I mean, it's obvious
that it was abandoned
We can see where the four
lifeboat davits were swung out
Within five minutes,
these people were in the water
fighting for their lives
Just over one mile away,
the attacker:
German U-boat U-166
Missing for 59 years,
her rusting hull was spotted
in May 2001
during survey work for a new
underwater pipeline
But how did U-166 sink?
Who was responsible?
And why is she lying so close
to her victim?
The official record offers
little clue
For decades, the circumstances
of this U-boat's sinking
have been mired in controversy
In 1942,
a young destroyer captain,
commander Herbert Claudius,
claimed credit for the kill
But the official report said
Claudius botched the attack
It was one man's word
against the US Navy
in a case obscured
by the fog of war
Ballard and his team
believe their technology,
building on the earlier
survey work,
can finally put the question
to rest
It isn't until fairly recently
that this submarine's been found
I'm gonna use my technology,
and see if an injustice was done
that needs to be corrected
It's a story that began three
years before U-166 was sunk,
before America
had even entered the war,
when Great Britain found itself
facing off against Nazi Germany
in one of the most pivotal
conflicts of World War II:
the Battle of the Atlantic
Lasting from the first day
of the war to the very end,
the fighting
would ultimately claim
nearly 6,000 Allied
and German ships
and span 5,000 miles of ocean
What was at stake was simply
Allied survival in World War II
Now at this stage of the war,
England was standing alone
against the rest of Europe,
which had been conquered
and brought under Nazi tyranny
If the British were defeated,
the war would be all but lost
There was no way that the Allies
were going to be able
to invade Normandy
from Hoboken, New Jersey
It just wouldn't have worked
You needed a launch pad;
the launch pad was England
But as an island nation,
Britain was vulnerable
Its survival depended on
supplies imported from abroad:
raw materials, food, weapons
Roughly one million tons
of cargo a year,
crossing the Atlantic
By 1941, the Nazis were close
to cutting off that flow
The key to their success
was the Unterseeboot...
German for "underwater boat"...
Known to the rest of the world
as the U-boat
The Nazis built nearly 1,200
of these deadly machines
They were meant
for one purpose only:
to attack
At either end of the U-boat
were tubes
for launching torpedoes...
23-foot-long underwater missiles
At its center, the conning tower
Below it, a maze of controls
for steering, diving,
and surfacing
Submerged, a U-boat's survival
depended on its pressure hull
Invisible from outside,
these structural ribs
and steel plate
were all that stood
between the crew
and thousands of tons
of seawater
Like today's hybrid cars,
U-boats relied on a combination
of internal combustion engines
and battery-powered
electric motors for propulsion
On the surface,
air-breathing diesels
could drive up to 18 knots,
roughly 20 miles an hour
Underwater,
the electric motors took over,
but the batteries
were a critical vulnerability
They typically lasted
less than 24 hours,
and the diesel engines
could only recharge them
on the surface
A U-boat is ultimately
a submersible rather
than a true submarine
It's not intended to operate
perpetually beneath the water
They have to be on the surface
several hours every day
in order to recharge
their batteries
And a U-boat on the surface
was a target
Despite this weakness,
the U-boats
were stunningly effective
The U-boat was a terrifying
weapon of war,
and it was especially terrifying
when it took on unarmed ships
that were carrying cargo
Commanding the German assault
was Kriegesmarine admiral
Karl Dönitz
During World War I
he commanded a German U-boat
That's where he learns
a lot of his lessons
He could be harsh at times,
but the U-boat men
considered him
a just leader,
and that's why they followed him
all through the war
With the US still neutral,
Dönitz focused his fleet
on the British ships
Wolfpacks, groups of U-boats
ranging from three
to more than 20 subs,
swarmed and overwhelmed
the British convoys
Dönitz directed the Wolfpacks
himself via long range radio
Admiral Dönitz was a very
hands-on type of manager
He wanted to know where
his U-boats were at all times
He required them to call in
on a daily basis
The Allies could hear
the transmissions,
but they couldn't
understand them
The Germans had a secret weapon:
the code machine known as Enigma
The Enigma machine itself
looks like
a very elaborate typewriter
that encodes and decrypts
the messages
as they're sent and received
The secret of the Enigma machine
was its constantly changing code
With every keystroke,
the code rotors that scrambled
the message shifted slightly,
generating a new code
No word would ever be encoded
the same way twice
Every day,
the sender and receiver
set the rotors to a position
listed in codebooks
each operator carried
The Allies had secretly copied
one of the machines,
but without knowing
the settings,
they had no hope
of deciphering the messages
By 1941,
the Enigma-equipped U-boats
were winning the Battle
of the Atlantic
England was being starved
into submission
In fact, British Prime Minister
Winston Churchill
would later say that
there was only one thing
that he feared
during World War II,
and it was the U-Boat
Then, a breakthrough
In May of 1941,
U-110 stopped reporting in
German command believed her sunk
In reality,
she had been captured
off the coast of Iceland
Her Enigma machine
and the code books
specifying the settings
were shipped back to London
British mathematician
Alan Turing
and a secret team of
codebreakers went to work
The British were able to break
the German naval ciphers
by the end of May,
beginning of June, 1941
That was critical
for saving British convoys
for the rest of 1941
The Germans had no idea
Mathematics, not munitions, had
bought the British crucial time
Until December 7, 1941,
when the Japanese bombed Pearl
Harbor and everything changed
With America officially at war,
US ships could now be targeted
Admiral Dönitz
seized the opportunity
to tilt the battle back
in Germany's favor
He knows that
right after Pearl Harbor,
if he sends U-Boats across
to attack the US Atlantic coast,
he knows he'll get a big payoff
because the United States
won't be ready
Dönitz believed his U-boats
could cut England's lifeline
of vital cargo
by striking at the source
Operation Drumbeat was born
But with his U-boats
stretched thin,
Dönitz had only a handful
of long-range boats,
known as Type IXs,
available to send to America
He assigns six Type IX U-boats,
and then one of them falls out,
so it's only initially five
Type IX U-boats
to operate off the US East Coast
The trip to America
took three weeks
British codebreakers
warned the US,
but in the wake of Pearl Harbor,
the Navy had other priorities
Neither the US Navy nor the
Army air forces was prepared
Not only did they not have
the airplanes
and the ships available,
but the ones
they did have available
did not have the sensors
or weapons
that could destroy a U-boat
Even basic protective measures
were ignored
You gotta remember,
all of Europe
is blacked out now,
and all the lights were on
There seems to be
no alerts whatsoever
Officials worried a blackout
could disrupt commerce
But no blackouts
meant cargo ships
were perfectly silhouetted
against the bright lights
They found, in effect,
U-boat Disneyland
It was wonderful
Horst von Schroeter
was watch officer on U-123
We closed the shore
within, say, two or three
nautical miles
We smelled the forest ashore,
and we saw the autos, the cars,
running on the shoreway
Erich Topp was commander
of U-552
and the third-most successful
U-boat commander of the war
It was a shooting of hares
It was because the Americans
at that time
had not developed counter-
measures against submarines,
and so we had
a very easy game there
It took one week,
as I remember, only
One week all the time, and we
sank, I think, about ten ships
In fact,
they return to their ports
in the Bay of Biscay
coast of France
empty, having fired
all of their torpedoes
By February 6,
barely three weeks
after the first U-boats arrived
in US waters,
they'd sunk 25 ships
Spurred on by the success,
Dönitz sent every U-boat he
could spare across the Atlantic,
including the newly built U-166,
the wreck Ballard
is closing in on
Onboard the Nautilus,
Ballard's team preps the ROVs
The primary unit,
named Hercules,
is equipped with several
high-definition cameras
Its sophisticated sonar will
locate and map the wreck site
This technology will offer
a view of the U-boat
with stunning clarity and detail
Hercules can dive
as deep as 2 5 miles,
putting U-166
well within its reach
But just like human divers,
it doesn't go alone
Hercules is tethered
to a second ROV named Argus
Physically linked
to the ship above,
Argus acts as a stabilizer
and light source for Hercules
It also sends video
up to the Nautilus
so the crew can watch
for potential hazards
Hercules is kept
on a short leash
to prevent its tether
from getting tangled
Operating the ROVs like this
is tricky
The ship's computers
must maintain its position
directly above the wreck
so the ROVs can safely
navigate the site
So computers
are driving the ship
Humans aren't driving
the ship right now,
it's being driven by computers
As we move the ship,
we're moving Argus
And Hercules's job
is to stay out on point
It will take over an hour
for the ROVs to reach
the wreck of U-166
By March of 1942,
Dönitz was sending
nearly half of his combat-ready
U-boats to attack America
The Germans had also regained
a crucial advantage,
a new Enigma machine
The German navy
increasingly suspects
that their cipher machine
has been compromised,
as indeed it has been
Dönitz upgraded the Enigma
machines on board his U-boats
with an additional rotor
Overnight, the new machine,
nicknamed Shark by the Allies,
made their codebreaking useless
From then on,
the Germans were well ahead
in terms of information
because the Allies
no longer could read
what the Germans were planning
For Dönitz and the U-boats,
the hunting was almost too good
They kept running
out of torpedoes and fuel
and had to travel 3,500 miles
back home to resupply
Until German engineers came up
with an inventive shortcut:
the Type XIV U-boat,
dubbed the Milk Cow
The Milk Cows
were not designed to fight
Instead of carrying
offensive weapons,
they just carried
extra fuel and provisions
and even extra torpedoes
for the U-boats
With 430 tons of fuel
and supplies,
the Milk Cows
were floating gas stations
And the Germans had an ideal
location to deploy them:
the Atlantic Gap
Aircraft based in North America,
aircraft based in Iceland
or Greenland
or in the United Kingdom,
their umbrella of coverage
left a gap right in the middle
That mid-Atlantic gap
was an area where U-boats knew
that they could operate
with impunity
because no Allied aircraft
could reach that gap
The Germans seemed to hold
every advantage
The U-boats were virtually
unstoppable
By April of 1942, three months
into Operation Drumbeat,
nearly 250 Allied ships had been
lost in American waters
Not a single U-boat
had been sunk
Happy times, they called it
In Germany,
"Die Glückliche Zeit"
There were more targets
available
than they could cope with
And the U-boat missions
were only becoming bolder
In June 1942,
the Nazis carried out
one of their most daring attacks
on America
Known as Operation Pastorius,
the program used U-boats
to land teams of Nazi spies
on American soil
The overall plan was that
German saboteurs and spies
would attack
vital railroad bridges,
aluminum plants that were making
the skin of the aircraft
that would ultimately drop bombs
on German cities
And the U-boat contribution
to this mission was vital
It couldn't have been done
without them
Two teams of spies were landed,
one on Long Island, New York,
the other near
Jacksonville, Florida
The spies dispersed
into the civilian population
and began their preparations
Meanwhile,
Dönitz and the U-boats
kept probing American defenses
They soon identified
an enticing new weak spot:
the shipping lanes
in the Gulf of Mexico
We had lapsed into the thinking
that everything's fine
in the Gulf of Mexico
because the enemy is not there
And so Dönitz sends them
into the Gulf of Mexico,
realizing that he'll get
yet another big payoff
with the Gulf of Mexico,
and oh, God,
what a payoff he got
In the month of May 1942,
he sank 41 ships
That's more than one ship a day
going down in flames
in the Gulf of Mexico
It was to this hunting ground
that U-166 would be assigned
for her first patrol in America
Home movies recorded by U-166's
captain, Hans-Gunther Kuhlmann,
show the young crew training
just weeks before the mission
On June 17, 1942, they left port
and set course for America
They would never be seen again
There's bottom
There you go
Aboard the Nautilus,
Bob Ballard is trying to
understand their final moments
What's it say?
Target bearing?
Target bearing is two thirty
Yeah, so it should show up
on sonar
They're coming down close enough
After reaching American waters
in July of 1942,
U-166 quickly sank three ships
and was looking for more
off the coast of Louisiana
On the afternoon of July 30,
another target appeared
in her sights:
the Robert E. Lee,
making its way to New Orleans
U-166 launched a single torpedo
The passenger ship
never fired a shot in return
Within minutes, it was sunk
But what U-166 didn't realize
was that the Robert E. Lee
was not alone
She had a naval escort ship,
PC-566
Its captain was
a young naval officer,
Herbert Gordon Claudius
He was a farm boy from Nebraska,
and he, I guess, wanted
to get out of Nebraska
And then of course,
his first ship in the Navy
was the PC-566
PC-566 had been commissioned
only the month before
Claudius and his crew
were about to see combat
for the very first time
As soon as a German torpedo
struck Robert E. Lee,
Claudius swings the PC-566
into action
One of the men on deck of PC-566
observes a periscope
in the water
Claudius then turns the vessel
toward that periscope sighting
He's doing that in an attempt
to approach from its blind side
A U-boat's periscope
has a narrow field of view
With the U-166's lens pointed
at the sinking Robert E. Lee,
the German captain couldn't see
the Navy ship coming
He's in the fray right now
He's trying to kill this guy
He wants to sneak
right up on top of that guy
so he can't get away
He's bearing down on it
as fast as he can,
and when he's 120 yards away,
he sees the periscope retract
He's following the wake,
and directly
over the estimated position,
he's setting off a sequential
series of five depth charges
The depth charge
is an underwater bomb
and the Allies' primary weapon
against U-boats
The attacking ship
estimates the location
and depth of the U-boat,
then sets the charges
to detonate
when they hit that depth
Fire two
Fire two
Water pressure
triggers the explosion,
sending a shockwave
ripping through the ocean
The explosion isn't powerful
enough to blow up a U-boat
The idea is to simply
crack its pressure hull
then let thousands of tons
of seawater finish the job
But depth charges aren't
necessarily a death sentence
The shock wave is only dangerous
up close
If the U-boat can dive
out of range, she can escape
U-boat crews had a series of
carefully rehearsed procedures
for trying to elude
depth charges,
as shown in this actual
wartime footage
The bow planes were set
to maximum angle,
driving the boat deeper
The electric motors were set
to full power
Men who were not on duty
ran forward
Their weight helped point
the boat down
The emergency dive
was the most critical test
a U-boat crew could face
Seconds meant the difference
between life and death
Horst von Schroeter
was watch officer
on one of the first U-boats
in Drumbeat, U-123
From the order alarm,
it took 30 seconds
to disappear from the surface
and another 30 seconds
to be on a depth of 60 meters
30 seconds can be
a long time in war
Werner Hirschmann
was chief engineer on U-190
I would call anybody
who was not scared for his life
under those circumstance a liar,
because it is a scary experience
to hear a depth charge
dropping into the water
and then expect,
in about five or ten seconds,
an explosion to go off
There's nothing you can do
You can just sit there and wait,
and this period of lack
of activity is really unnerving
The crew of U-166 left no record
of their final moments
They didn't send a radio report
that day,
or even a distress signal
All that is known comes from
the report filed by Claudius
He dropped a second round
of depth charges
An oil slick spread
on the surface
So now the periscope's
no longer visible,
the depth charges have gone off,
there's no wake
You know, did he kill it?
And he sees an oil slick
You know, that's a very good
indication that he hit it
In his report,
Claudius was clear
It is my opinion that
the sub was sunk
or so mortally wounded that she
would never return to her base
I mean, this is the fog of war
But he is pretty confident that
that oil slick
is associated
with that submarine
They attack the submarine
They come back
and rescue the survivors,
the 400 people that are in the
water from the Robert E. Lee.
Claudius radioed for help,
knowing that his ship was
too small to rescue everyone
It's not that big a ship
It was so top heavy
that he actually had to unload
some of them back into lifeboats
so that his ship became stable
But then two other ships
came out
and between the three boats,
they took them back
to New Orleans
Claudius returned to port
with the survivors
Then, a shock
Instead of getting
a hero's welcome,
he was actually reprimanded
His entire attack is criticized
As a matter of fact,
he's removed from command
and then sent back to school
They didn't believe,
not for one minute,
that he had actually sunk
the U-166
Senior commanders
concluded that Claudius
made a series of basic errors
They said he was
in the wrong position
while escorting
the Robert E. Lee;
he approached the U-boat
the wrong way;
and crucially, he deployed
his depth charges too slowly
and at the wrong depths
They're all saying, "No way
"No way did he sink this sub
"The attack
was poorly conducted,
"and there is insufficient
evidence
to give higher assessment
than an F"
An F!
Says "F" right there
Flunked
That's pretty humiliating
Gordon Claudius, Herbert's son,
was only two years old
at the time
He believes the review
of his father was unfair
It was not favorable
He didn't talk much about
well, his wartime activities
My sister,
she was older than I was
and more in a position to think
about things and ask questions,
and she said,
well, she asked him one time
and all he said was,
well, he attacked a submarine
and he saw an oil slick
and he saw debris
That was it
I think it not only got
to my father,
but I think it got
to the whole crew
After the war,
captured German records
revealed that U-166 was the only
U-boat lost in the Gulf
But the Navy concluded
that U-166 had been sunk
in an entirely different attack
that took place two days later
and 140 miles from where
commander Claudius gave chase
A U-boat is spotted
south of Houma, Louisiana,
running on the surface
And a US Coast Guard
patrol plane
attacks it with depth charges,
and then in the aftermath
of the attack
observes an oil slick
on the surface of the water
The Coast Guard air crew
was given credit for the kill,
and so official history
was written
Yet despite decades
of searching,
a wrecked U-boat was never found
at the location
where the Coast Guard plane
made its attack
It's not for a lack of trying
People are going out
on dive expeditions
thinking that they have
the exact spot
where U-166 went down,
but nobody finds it
Until 2001,
when marine archaelogists
from C&C Technologies made
a surprising discovery
during preparations
for an undersea pipeline
When we were looking at
the extra data
and we saw the bow section
And at that point we looked at
each other and we were like
All the pieces came together
And it turns out
it was the U-166
We knew in that moment
that Lt Commander Claudius
and the crew of PC-566
had sank U-166
Yet 13 years later,
the Navy record still denies
Claudius credit
So now we need
to set the record straight,
because this guy died without
recognition for what he did
Unless Bob Ballard and Richie
Kohler can find a way
to prove to the Navy that
Claudius was responsible,
the official record
will stand as is
A mile below,
Ballard's ROVs are closing in
on the wrecked U-boat
All right, showtime
Let's drop down there
There it is
Thar she blows
She is in incredible condition,
right where the previous survey
said she would be
The aft part of the submarine
looks like we could
just blow off the dust,
start the engines and go
Right
250 feet long,
weighing 1,100 tons,
in 1942, U-166 was
a state-of-the-art
killing machine
Now she is a tomb
Oh, my gosh
That's a gun
So far, no damage is apparent
Back up a little
Frame it a little
Right there, okay
Though Richie Kohler
sees evidence
that the crew of U-166
knew they were in danger
There is a couple
of telltale signs
that this sub was
in a crash dive
or trying to get down real quick
Number one, the aerial,
the antenna that you see
that's bent,
that's a transmitting antenna
So it wasn't making
It's supposed to be retracted
when they're diving
So he was too busy to do that?
Everything stopped
We've got the 20 millimeter gun
that should have been locked in
position for underwater travel
It's swung out to port
The periscope never came
back down all the way
You can almost, you know,
see these men
are running to the forward end
of the submarine
trying to get the bow heavier,
trying to get it down,
because they knew
trouble was coming
And they didn't make it
They didn't make it
It does appear the sub
was running for its life
But so far, they see no sign
of the tell-tale fractures
in the hull
that two rounds of depth charges
should have produced
The wreck seems
surprisingly intact
And then, something strange
Now, that's not normal
Could you stop right there,
Will, and zoom in on that?
Ballard zooms in,
looking for the bow,
the front of the sub
It appears to be buried
in the sand, but it's not
It's completely gone
There's no way a depth charge
could have sheared off the bow
of U-166 like this
So what happened?
The missing bow holds
vital clues
We gotta go find the other piece
The ROVs move out
across the sand
For many meters, there's nothing
Then suddenly
It's the missing bow
And it's been reduced
to scrap metal
This is definitely not
a depth charge
If that was a depth charge,
we would not see
this thin lattice work
This would've been
totally blown away
Normally, a depth charge
just cracks the pressure hull
But this is no fracture;
it's an amputation
Most of the time,
we see concave indents
from depth charges
We don't see twisted
and torn metal
With this level of destruction,
it makes it difficult
to ascertain what caused what
It's a conundrum
The location supports Claudius's
claim that he sank this boat,
but the damage doesn't match
a normal depth charge attack
like the one Claudius made
To understand what happened,
the team needs to put the two
pieces of U-166 back together
We know that we've got this
up in the bow, separated,
and then we don't know how much
Well, you know,
we take the two pieces
and we see how much of it we see
Put them together
and you see what you're missing
But the visibility is too murky
to image the entire wreck
in one shot
We can't see very far underwater
I mean, if you're lucky
you can see 30, 40 feet
Fortunately, Ballard's ROVs
are equipped
for just such conditions
What we'll do now is
we've now outlined, and so
we need to bring Clara up
Is Clara in the ready?
So we can digitize
this whole thing
Clara Smart is the team's high
resolution mapping specialist
As she watches, the ROV
does a sweep of the wreck,
taking thousands
of close-up photographs
with its ultra-high
resolution cameras
The vehicle takes one image
every three seconds,
and what we're going to do is
we're going to combine
all these images to create
One
One very big, beautiful image
You can see it's marching along
Yep, and it's just matching
one picture to the next
The whole idea overall is
when we are on a site,
we have a flashlight
in a hay field
and you can't see anything,
but once we make these maps,
all of a sudden,
like all the lights came on
so we truly see exactly
what's down there
Clara will spend
the next several months
stitching
the thousands of close-ups
into a single giant wide shot,
called a photo mosaic,
that shows the entire wreck
Every rivet and crack will be
visible with unmatched clarity
Here, we're able
to get a picture
you can't get any other way,
a map that shows you
what it would look like
if you could take the water away
And that'll help tell us
what happened to the submarine
Back at the University of Rhode
Island, Clara gets to work
To start,
computers assemble the images
But they can only do so much
As you can see,
we've got some issues
In problem areas,
Clara will have to match
individual frames by eye
It's a laborious process
Finally,
Ballard calls Richie Kohler
and historian Marty Morgan
to his lab
The mosaic of U-166 is complete
Thousands of photographs have
been seamlessly meshed together
But will the mosaic give
the team what they need?
We took about 2,000 images
with the ROV,
and that's been boiled down
to these two mosaics
So this is really CSI
We're talking
about 2,000 pictures
to give us one continuous image
of what the U-166 looks like now
Right, and it would be
as if you were flying over it
with an airplane and you saw
an aerial view
The key evidence lies
somewhere in the break
between the two pieces
That's where it all took place
The fact that this has been
completely blown off
And 100 meters away
And 100 meters away
You know, the question is,
was the depth charge
enough power
to literally tear off
the front of a pressure hull?
It's not really been seen before
In almost every instance
So you're led to believe
that there was another culprit
in the mix
When the two pieces of U-166
are slid back together,
they see that the break occurred
right at the forward
torpedo room
Interesting enough,
right here, where my finger is,
is exactly where the torpedo
tubes would have been loaded
You can see them clearly
in the blueprints
We know they're there
But something destroyed
the torpedo tubes
And there's how many
torpedoes here?
There could have been four
Four on the deck,
four spare reloads
Spare torpedoes
were stored on the floor
of the two torpedo rooms,
bow and stern
If the forward torpedoes
somehow exploded
while stored inside U-166,
that could explain the
incredible damage to her bow
If that is what happened,
it points to an unlikely
and catastrophic chain of events
As U-166
frantically dove to escape,
Commander Herbert Claudius
dropped his depth charges
So they were pretty shallow
Well, they were seen on the
surface with their periscope up
This is what has led me
to believe the possibility
of one of the five depth charges
that were distributed by PC-566
landed on the deck there
And it carried it with 'em
Marty Morgan believes
a depth charge landed
directly on top of U-166
As the sub dove to escape,
she carried the bomb down
to its explosion depth,
setting off a chain reaction
that detonated her own torpedoes
That would make sense because
clearly it was so instant,
he's just putting
his periscope down
His dive angle isn't that great
He probably wasn't even
30 feet deep
Right, so it very conceivably
landed on him, clunk,
and he carried the bomb
Carries it down with him
Hustling forward
to weigh down the bow,
the crew might have run right
into the exploding torpedo room
If you understand how the German
submarines would dive,
one of the things they would use
the crew for is ballast
They would tell the crew to run
"Everyone
run to the front!"
And that's exactly
where it happened
The team is convinced
While a depth charge
couldn't produce the damage
seen on U-166, it could have
detonated her torpedoes
Combined with the U-boat's
location,
it makes a persuasive argument
Instead of being reprimanded
for his attack,
Commander Herbert Claudius
should have gotten a medal
Nice shot
Perfect shot, actually
Couldn't have done it better
But the team still faces
a huge hurdle:
convincing the US Navy
Ballard, a former
Navy commander himself,
puts their findings in writing
and forwards them to
the Chief of Naval Operations,
the most senior officer
in the Navy
73 years after the battle,
the Navy agrees
to review the case
Though it wasn't apparent
in 1942,
even as U-166
sank to the bottom,
Operation Drumbeat
was already drawing to a close
The sinking of 166
This is the first time we
actually,
in the Gulf of Mexico,
drew blood
Didn't mean that we had
taken the teeth away
from the U-boats
No, they were going
to continue to sink ships,
but now it was going
to cost them,
it was going to cost them dearly
Allied science and engineering
were finally beginning
to turn the tide
Improved radar and
high-frequency direction-finding
meant the U-boats
could be detected
whenever they surfaced,
even at night,
while mass production of
aircraft like the B-24 Liberator
meant the Atlantic Gap
was no longer a safe haven
for the Milk Cows
But the decisive stroke came
with the capture of U-559
in October of 1942
What they get out of U-559
enables Allied codebreakers
to regain that insight
into the new Enigma machine
with its fourth rotor
And by the end of December 1942
and certainly
by the spring of 1943,
the British and Americans
can now read German U-boat
signals in almost real time
The Enigma code
was cracked once again
The U-boats had lost nearly
all their advantages
Even the Nazi spies
of Operation Pastorius,
landed via U-boat
to sabotage American industry,
proved to be utter failures
All eight operatives
were captured within days,
and the Germans
canceled the program
Never again would U-boats
rule the seas
They had failed
in their stated goal:
cutting off the flow of supplies
from America to England
Yet they had come
dangerously close,
and the damage caused
by their attacks was immense
Hitler's U-boats sank 609 ships
in American-protected waters
Over three million tons of cargo
never made it to Britain,
and over 5,000 lives were lost
On the German side,
out of the 743 U-boats
lost in World War II,
only ten were sunk
in American waters
Of those, only one was sunk
in the Gulf of Mexico: U-166
But will the Navy give credit
to Commander Herbert Gordon
Claudius?
At the Navy History
and Heritage Command,
historians have analyzed
Ballard's evidence,
as well as reports
from the marine archaelogists
that first IDed U-166
The two teams are nearly
lockstep in their conclusions
It was Commander Claudius and
his naval escort ship PC-566
The Underwater
Archaeology Branch
here at Naval History
and Heritage Command
looked at the information
and confirmed that absolutely,
we believe that
PC-566 did successfully
attack and sink U-166
Whether it was skill,
whether it was luck
or a combination of both,
they were successful in the end
In 2014, 72 years
after the battle,
Admiral Jonathan Greenert,
chief of naval operations,
and Secretary of the Navy
Ray Mabus
award Commander Herbert Claudius
the Legion of Merit
Good afternoon, everybody,
and we're here to recognize
and actually to honor
Lieutenant Commander
Herbert G Claudius
This is really for me a story,
I think, of history obviously,
but also a story of explorers,
of shipmates,
of friends, of historians,
and I think relentlessness
to set the record straight
Gordon Claudius,
the only surviving child
of Herbert Claudius,
is here to accept the award
on his father's behalf
Now, 70 years later,
because of technology,
we now know that your father's
after-action report
was absolutely accurate
And I think this is
a good example of,
"It's never too late
to set the record straight,
it's never too late
to do the right thing"
So it's an honor
to be here today
to present your father
posthumously
with the Legion of Merit
for valiant actions
during a very tough and very
dangerous combat situation
On behalf of your father
Thank you
I present this to you
with the V for Valor,
which means it happened
in combat
It sure did
This really brings closure
on a story that began
a month before I was born
73 years ago
So this is a wrap, a nice wrap
So long after the conflict,
World War II is fading history
Few remember the battles
Herbert Claudius
and other heroes once fought
so close to our shores,
but the sunken remains
are still there,
often nearer than we know,
enduring reminders
of just how close the Nazis came
to setting history
on a very different path
America is just weeks
into World War II
when the European fight
comes to our shores
Hitler's U-boats waste no time
going on the attack
They brought the war to us
in a way that caught us
by surprise
The attacks are devastating
Thousands of lives lost,
more ships sunk
than at Pearl Harbor,
and Nazi spies secretly
delivered to American soil
They kicked our asses,
and yet we were getting
no payback
A lot of Americans
have forgotten
how close the war came
to our shores
and how close it was
to our homes
Now renowned explorer
Robert Ballard and his team
are returning
to this forgotten battlefield
with the latest technology
Okay team, 100 meters
Here, we're able
to get a picture
that shows you
what it would like
if you could take the water away
Their work will help rewrite
this chapter of World War II
and bring closure to
a 73-year-old mystery:
who sank German U-boat U-166?
How close did the Nazis come
to victory in the Atlantic?
Right now, on this NOVA/
National Geographic special
The Gulf of Mexico, 120 miles
off the coast of New Orleans
These peaceful waters
were once the setting
for a violent, little-known
chapter of World War II
Deep below the surface
lie the remnants
of a devastating Nazi attack
on America: Operation Drumbeat
Just after the US entered
World War II,
Hitler's submarines,
the deadly U-boats,
struck hard and fast
up and down the East Coast
They hunted down and sank
the vulnerable cargo ships
that were critical
to the Allied war effort
And they took the war further,
extending their assault
all the way
into the Gulf of Mexico
Now, explorer Robert Ballard
and his crew
prepare to investigate
this battlefield
To reach the sea floor,
they'll use high-tech remotely
operated vehicles... ROVs
The beauty of the ROVs,
these vehicles can stay down
for days and days and days
Square up on the target
and drive over to it
The ROVs descend one mile
beneath the surface,
where the casualties
of the Nazi assault still rest
A World War II-era cargo ship,
the Alcoa Puritan
In 1942, she hauled aluminum ore
vital to America's
wartime factories
Her scars are still vivid
That's a hole,
that's a shell hole
So if you could stop laterally
and go in and frame that
These are bent inward
Yeah, you can tell it went in
Yep
Joining Ballard is wreck diver
Richie Kohler
He's spent decades studying
and diving on sunken U-boats
This wreck is a snapshot
of when the U-boats
first came to America
This is when the U-boats
were not afraid of us
We hadn't got our act together
Not far from the Alcoa,
an oil tanker, the SS Gulf Penn,
90,000 barrels of oil
still trapped inside
These are in some ways
ticking time bombs
in the sense that the
hull will rupture
and you'll have oil come out
Could you look at that wreckage?
Could you look at the wreckage
before you go too far?
But Ballard and Kohler's
ultimate goal
is a pair of shipwrecks
resting not far away,
one the hunter, the other hunted
This is the SS Robert E. Lee,
the victim
In 1942,
407 souls walked these decks
On board the Robert E. Lee
was not only passengers,
but there were actually
survivors
from previous
German U-Boat sinkings
that occurred out
in the Atlantic Ocean
Square on the gun
a little better
A three-inch deck gun
had been added for protection
against the U-boat threat
This gun never went into play
They never had a target
He's locked up,
he's in a stored position
The attack came
with almost no warning
You could almost imagine them
standing along the side
looking at what they thought
was a porpoise
and then it makes a turn
and comes into them
It's actually a torpedo
Today, the fatal wound
inflicted by the German torpedo
is hidden beneath layers of silt
on the ocean floor
It's amazing that most
of the damage is not visible
Now, we're looking
at a ghost ship
I mean, it's obvious
that it was abandoned
We can see where the four
lifeboat davits were swung out
Within five minutes,
these people were in the water
fighting for their lives
Just over one mile away,
the attacker:
German U-boat U-166
Missing for 59 years,
her rusting hull was spotted
in May 2001
during survey work for a new
underwater pipeline
But how did U-166 sink?
Who was responsible?
And why is she lying so close
to her victim?
The official record offers
little clue
For decades, the circumstances
of this U-boat's sinking
have been mired in controversy
In 1942,
a young destroyer captain,
commander Herbert Claudius,
claimed credit for the kill
But the official report said
Claudius botched the attack
It was one man's word
against the US Navy
in a case obscured
by the fog of war
Ballard and his team
believe their technology,
building on the earlier
survey work,
can finally put the question
to rest
It isn't until fairly recently
that this submarine's been found
I'm gonna use my technology,
and see if an injustice was done
that needs to be corrected
It's a story that began three
years before U-166 was sunk,
before America
had even entered the war,
when Great Britain found itself
facing off against Nazi Germany
in one of the most pivotal
conflicts of World War II:
the Battle of the Atlantic
Lasting from the first day
of the war to the very end,
the fighting
would ultimately claim
nearly 6,000 Allied
and German ships
and span 5,000 miles of ocean
What was at stake was simply
Allied survival in World War II
Now at this stage of the war,
England was standing alone
against the rest of Europe,
which had been conquered
and brought under Nazi tyranny
If the British were defeated,
the war would be all but lost
There was no way that the Allies
were going to be able
to invade Normandy
from Hoboken, New Jersey
It just wouldn't have worked
You needed a launch pad;
the launch pad was England
But as an island nation,
Britain was vulnerable
Its survival depended on
supplies imported from abroad:
raw materials, food, weapons
Roughly one million tons
of cargo a year,
crossing the Atlantic
By 1941, the Nazis were close
to cutting off that flow
The key to their success
was the Unterseeboot...
German for "underwater boat"...
Known to the rest of the world
as the U-boat
The Nazis built nearly 1,200
of these deadly machines
They were meant
for one purpose only:
to attack
At either end of the U-boat
were tubes
for launching torpedoes...
23-foot-long underwater missiles
At its center, the conning tower
Below it, a maze of controls
for steering, diving,
and surfacing
Submerged, a U-boat's survival
depended on its pressure hull
Invisible from outside,
these structural ribs
and steel plate
were all that stood
between the crew
and thousands of tons
of seawater
Like today's hybrid cars,
U-boats relied on a combination
of internal combustion engines
and battery-powered
electric motors for propulsion
On the surface,
air-breathing diesels
could drive up to 18 knots,
roughly 20 miles an hour
Underwater,
the electric motors took over,
but the batteries
were a critical vulnerability
They typically lasted
less than 24 hours,
and the diesel engines
could only recharge them
on the surface
A U-boat is ultimately
a submersible rather
than a true submarine
It's not intended to operate
perpetually beneath the water
They have to be on the surface
several hours every day
in order to recharge
their batteries
And a U-boat on the surface
was a target
Despite this weakness,
the U-boats
were stunningly effective
The U-boat was a terrifying
weapon of war,
and it was especially terrifying
when it took on unarmed ships
that were carrying cargo
Commanding the German assault
was Kriegesmarine admiral
Karl Dönitz
During World War I
he commanded a German U-boat
That's where he learns
a lot of his lessons
He could be harsh at times,
but the U-boat men
considered him
a just leader,
and that's why they followed him
all through the war
With the US still neutral,
Dönitz focused his fleet
on the British ships
Wolfpacks, groups of U-boats
ranging from three
to more than 20 subs,
swarmed and overwhelmed
the British convoys
Dönitz directed the Wolfpacks
himself via long range radio
Admiral Dönitz was a very
hands-on type of manager
He wanted to know where
his U-boats were at all times
He required them to call in
on a daily basis
The Allies could hear
the transmissions,
but they couldn't
understand them
The Germans had a secret weapon:
the code machine known as Enigma
The Enigma machine itself
looks like
a very elaborate typewriter
that encodes and decrypts
the messages
as they're sent and received
The secret of the Enigma machine
was its constantly changing code
With every keystroke,
the code rotors that scrambled
the message shifted slightly,
generating a new code
No word would ever be encoded
the same way twice
Every day,
the sender and receiver
set the rotors to a position
listed in codebooks
each operator carried
The Allies had secretly copied
one of the machines,
but without knowing
the settings,
they had no hope
of deciphering the messages
By 1941,
the Enigma-equipped U-boats
were winning the Battle
of the Atlantic
England was being starved
into submission
In fact, British Prime Minister
Winston Churchill
would later say that
there was only one thing
that he feared
during World War II,
and it was the U-Boat
Then, a breakthrough
In May of 1941,
U-110 stopped reporting in
German command believed her sunk
In reality,
she had been captured
off the coast of Iceland
Her Enigma machine
and the code books
specifying the settings
were shipped back to London
British mathematician
Alan Turing
and a secret team of
codebreakers went to work
The British were able to break
the German naval ciphers
by the end of May,
beginning of June, 1941
That was critical
for saving British convoys
for the rest of 1941
The Germans had no idea
Mathematics, not munitions, had
bought the British crucial time
Until December 7, 1941,
when the Japanese bombed Pearl
Harbor and everything changed
With America officially at war,
US ships could now be targeted
Admiral Dönitz
seized the opportunity
to tilt the battle back
in Germany's favor
He knows that
right after Pearl Harbor,
if he sends U-Boats across
to attack the US Atlantic coast,
he knows he'll get a big payoff
because the United States
won't be ready
Dönitz believed his U-boats
could cut England's lifeline
of vital cargo
by striking at the source
Operation Drumbeat was born
But with his U-boats
stretched thin,
Dönitz had only a handful
of long-range boats,
known as Type IXs,
available to send to America
He assigns six Type IX U-boats,
and then one of them falls out,
so it's only initially five
Type IX U-boats
to operate off the US East Coast
The trip to America
took three weeks
British codebreakers
warned the US,
but in the wake of Pearl Harbor,
the Navy had other priorities
Neither the US Navy nor the
Army air forces was prepared
Not only did they not have
the airplanes
and the ships available,
but the ones
they did have available
did not have the sensors
or weapons
that could destroy a U-boat
Even basic protective measures
were ignored
You gotta remember,
all of Europe
is blacked out now,
and all the lights were on
There seems to be
no alerts whatsoever
Officials worried a blackout
could disrupt commerce
But no blackouts
meant cargo ships
were perfectly silhouetted
against the bright lights
They found, in effect,
U-boat Disneyland
It was wonderful
Horst von Schroeter
was watch officer on U-123
We closed the shore
within, say, two or three
nautical miles
We smelled the forest ashore,
and we saw the autos, the cars,
running on the shoreway
Erich Topp was commander
of U-552
and the third-most successful
U-boat commander of the war
It was a shooting of hares
It was because the Americans
at that time
had not developed counter-
measures against submarines,
and so we had
a very easy game there
It took one week,
as I remember, only
One week all the time, and we
sank, I think, about ten ships
In fact,
they return to their ports
in the Bay of Biscay
coast of France
empty, having fired
all of their torpedoes
By February 6,
barely three weeks
after the first U-boats arrived
in US waters,
they'd sunk 25 ships
Spurred on by the success,
Dönitz sent every U-boat he
could spare across the Atlantic,
including the newly built U-166,
the wreck Ballard
is closing in on
Onboard the Nautilus,
Ballard's team preps the ROVs
The primary unit,
named Hercules,
is equipped with several
high-definition cameras
Its sophisticated sonar will
locate and map the wreck site
This technology will offer
a view of the U-boat
with stunning clarity and detail
Hercules can dive
as deep as 2 5 miles,
putting U-166
well within its reach
But just like human divers,
it doesn't go alone
Hercules is tethered
to a second ROV named Argus
Physically linked
to the ship above,
Argus acts as a stabilizer
and light source for Hercules
It also sends video
up to the Nautilus
so the crew can watch
for potential hazards
Hercules is kept
on a short leash
to prevent its tether
from getting tangled
Operating the ROVs like this
is tricky
The ship's computers
must maintain its position
directly above the wreck
so the ROVs can safely
navigate the site
So computers
are driving the ship
Humans aren't driving
the ship right now,
it's being driven by computers
As we move the ship,
we're moving Argus
And Hercules's job
is to stay out on point
It will take over an hour
for the ROVs to reach
the wreck of U-166
By March of 1942,
Dönitz was sending
nearly half of his combat-ready
U-boats to attack America
The Germans had also regained
a crucial advantage,
a new Enigma machine
The German navy
increasingly suspects
that their cipher machine
has been compromised,
as indeed it has been
Dönitz upgraded the Enigma
machines on board his U-boats
with an additional rotor
Overnight, the new machine,
nicknamed Shark by the Allies,
made their codebreaking useless
From then on,
the Germans were well ahead
in terms of information
because the Allies
no longer could read
what the Germans were planning
For Dönitz and the U-boats,
the hunting was almost too good
They kept running
out of torpedoes and fuel
and had to travel 3,500 miles
back home to resupply
Until German engineers came up
with an inventive shortcut:
the Type XIV U-boat,
dubbed the Milk Cow
The Milk Cows
were not designed to fight
Instead of carrying
offensive weapons,
they just carried
extra fuel and provisions
and even extra torpedoes
for the U-boats
With 430 tons of fuel
and supplies,
the Milk Cows
were floating gas stations
And the Germans had an ideal
location to deploy them:
the Atlantic Gap
Aircraft based in North America,
aircraft based in Iceland
or Greenland
or in the United Kingdom,
their umbrella of coverage
left a gap right in the middle
That mid-Atlantic gap
was an area where U-boats knew
that they could operate
with impunity
because no Allied aircraft
could reach that gap
The Germans seemed to hold
every advantage
The U-boats were virtually
unstoppable
By April of 1942, three months
into Operation Drumbeat,
nearly 250 Allied ships had been
lost in American waters
Not a single U-boat
had been sunk
Happy times, they called it
In Germany,
"Die Glückliche Zeit"
There were more targets
available
than they could cope with
And the U-boat missions
were only becoming bolder
In June 1942,
the Nazis carried out
one of their most daring attacks
on America
Known as Operation Pastorius,
the program used U-boats
to land teams of Nazi spies
on American soil
The overall plan was that
German saboteurs and spies
would attack
vital railroad bridges,
aluminum plants that were making
the skin of the aircraft
that would ultimately drop bombs
on German cities
And the U-boat contribution
to this mission was vital
It couldn't have been done
without them
Two teams of spies were landed,
one on Long Island, New York,
the other near
Jacksonville, Florida
The spies dispersed
into the civilian population
and began their preparations
Meanwhile,
Dönitz and the U-boats
kept probing American defenses
They soon identified
an enticing new weak spot:
the shipping lanes
in the Gulf of Mexico
We had lapsed into the thinking
that everything's fine
in the Gulf of Mexico
because the enemy is not there
And so Dönitz sends them
into the Gulf of Mexico,
realizing that he'll get
yet another big payoff
with the Gulf of Mexico,
and oh, God,
what a payoff he got
In the month of May 1942,
he sank 41 ships
That's more than one ship a day
going down in flames
in the Gulf of Mexico
It was to this hunting ground
that U-166 would be assigned
for her first patrol in America
Home movies recorded by U-166's
captain, Hans-Gunther Kuhlmann,
show the young crew training
just weeks before the mission
On June 17, 1942, they left port
and set course for America
They would never be seen again
There's bottom
There you go
Aboard the Nautilus,
Bob Ballard is trying to
understand their final moments
What's it say?
Target bearing?
Target bearing is two thirty
Yeah, so it should show up
on sonar
They're coming down close enough
After reaching American waters
in July of 1942,
U-166 quickly sank three ships
and was looking for more
off the coast of Louisiana
On the afternoon of July 30,
another target appeared
in her sights:
the Robert E. Lee,
making its way to New Orleans
U-166 launched a single torpedo
The passenger ship
never fired a shot in return
Within minutes, it was sunk
But what U-166 didn't realize
was that the Robert E. Lee
was not alone
She had a naval escort ship,
PC-566
Its captain was
a young naval officer,
Herbert Gordon Claudius
He was a farm boy from Nebraska,
and he, I guess, wanted
to get out of Nebraska
And then of course,
his first ship in the Navy
was the PC-566
PC-566 had been commissioned
only the month before
Claudius and his crew
were about to see combat
for the very first time
As soon as a German torpedo
struck Robert E. Lee,
Claudius swings the PC-566
into action
One of the men on deck of PC-566
observes a periscope
in the water
Claudius then turns the vessel
toward that periscope sighting
He's doing that in an attempt
to approach from its blind side
A U-boat's periscope
has a narrow field of view
With the U-166's lens pointed
at the sinking Robert E. Lee,
the German captain couldn't see
the Navy ship coming
He's in the fray right now
He's trying to kill this guy
He wants to sneak
right up on top of that guy
so he can't get away
He's bearing down on it
as fast as he can,
and when he's 120 yards away,
he sees the periscope retract
He's following the wake,
and directly
over the estimated position,
he's setting off a sequential
series of five depth charges
The depth charge
is an underwater bomb
and the Allies' primary weapon
against U-boats
The attacking ship
estimates the location
and depth of the U-boat,
then sets the charges
to detonate
when they hit that depth
Fire two
Fire two
Water pressure
triggers the explosion,
sending a shockwave
ripping through the ocean
The explosion isn't powerful
enough to blow up a U-boat
The idea is to simply
crack its pressure hull
then let thousands of tons
of seawater finish the job
But depth charges aren't
necessarily a death sentence
The shock wave is only dangerous
up close
If the U-boat can dive
out of range, she can escape
U-boat crews had a series of
carefully rehearsed procedures
for trying to elude
depth charges,
as shown in this actual
wartime footage
The bow planes were set
to maximum angle,
driving the boat deeper
The electric motors were set
to full power
Men who were not on duty
ran forward
Their weight helped point
the boat down
The emergency dive
was the most critical test
a U-boat crew could face
Seconds meant the difference
between life and death
Horst von Schroeter
was watch officer
on one of the first U-boats
in Drumbeat, U-123
From the order alarm,
it took 30 seconds
to disappear from the surface
and another 30 seconds
to be on a depth of 60 meters
30 seconds can be
a long time in war
Werner Hirschmann
was chief engineer on U-190
I would call anybody
who was not scared for his life
under those circumstance a liar,
because it is a scary experience
to hear a depth charge
dropping into the water
and then expect,
in about five or ten seconds,
an explosion to go off
There's nothing you can do
You can just sit there and wait,
and this period of lack
of activity is really unnerving
The crew of U-166 left no record
of their final moments
They didn't send a radio report
that day,
or even a distress signal
All that is known comes from
the report filed by Claudius
He dropped a second round
of depth charges
An oil slick spread
on the surface
So now the periscope's
no longer visible,
the depth charges have gone off,
there's no wake
You know, did he kill it?
And he sees an oil slick
You know, that's a very good
indication that he hit it
In his report,
Claudius was clear
It is my opinion that
the sub was sunk
or so mortally wounded that she
would never return to her base
I mean, this is the fog of war
But he is pretty confident that
that oil slick
is associated
with that submarine
They attack the submarine
They come back
and rescue the survivors,
the 400 people that are in the
water from the Robert E. Lee.
Claudius radioed for help,
knowing that his ship was
too small to rescue everyone
It's not that big a ship
It was so top heavy
that he actually had to unload
some of them back into lifeboats
so that his ship became stable
But then two other ships
came out
and between the three boats,
they took them back
to New Orleans
Claudius returned to port
with the survivors
Then, a shock
Instead of getting
a hero's welcome,
he was actually reprimanded
His entire attack is criticized
As a matter of fact,
he's removed from command
and then sent back to school
They didn't believe,
not for one minute,
that he had actually sunk
the U-166
Senior commanders
concluded that Claudius
made a series of basic errors
They said he was
in the wrong position
while escorting
the Robert E. Lee;
he approached the U-boat
the wrong way;
and crucially, he deployed
his depth charges too slowly
and at the wrong depths
They're all saying, "No way
"No way did he sink this sub
"The attack
was poorly conducted,
"and there is insufficient
evidence
to give higher assessment
than an F"
An F!
Says "F" right there
Flunked
That's pretty humiliating
Gordon Claudius, Herbert's son,
was only two years old
at the time
He believes the review
of his father was unfair
It was not favorable
He didn't talk much about
well, his wartime activities
My sister,
she was older than I was
and more in a position to think
about things and ask questions,
and she said,
well, she asked him one time
and all he said was,
well, he attacked a submarine
and he saw an oil slick
and he saw debris
That was it
I think it not only got
to my father,
but I think it got
to the whole crew
After the war,
captured German records
revealed that U-166 was the only
U-boat lost in the Gulf
But the Navy concluded
that U-166 had been sunk
in an entirely different attack
that took place two days later
and 140 miles from where
commander Claudius gave chase
A U-boat is spotted
south of Houma, Louisiana,
running on the surface
And a US Coast Guard
patrol plane
attacks it with depth charges,
and then in the aftermath
of the attack
observes an oil slick
on the surface of the water
The Coast Guard air crew
was given credit for the kill,
and so official history
was written
Yet despite decades
of searching,
a wrecked U-boat was never found
at the location
where the Coast Guard plane
made its attack
It's not for a lack of trying
People are going out
on dive expeditions
thinking that they have
the exact spot
where U-166 went down,
but nobody finds it
Until 2001,
when marine archaelogists
from C&C Technologies made
a surprising discovery
during preparations
for an undersea pipeline
When we were looking at
the extra data
and we saw the bow section
And at that point we looked at
each other and we were like
All the pieces came together
And it turns out
it was the U-166
We knew in that moment
that Lt Commander Claudius
and the crew of PC-566
had sank U-166
Yet 13 years later,
the Navy record still denies
Claudius credit
So now we need
to set the record straight,
because this guy died without
recognition for what he did
Unless Bob Ballard and Richie
Kohler can find a way
to prove to the Navy that
Claudius was responsible,
the official record
will stand as is
A mile below,
Ballard's ROVs are closing in
on the wrecked U-boat
All right, showtime
Let's drop down there
There it is
Thar she blows
She is in incredible condition,
right where the previous survey
said she would be
The aft part of the submarine
looks like we could
just blow off the dust,
start the engines and go
Right
250 feet long,
weighing 1,100 tons,
in 1942, U-166 was
a state-of-the-art
killing machine
Now she is a tomb
Oh, my gosh
That's a gun
So far, no damage is apparent
Back up a little
Frame it a little
Right there, okay
Though Richie Kohler
sees evidence
that the crew of U-166
knew they were in danger
There is a couple
of telltale signs
that this sub was
in a crash dive
or trying to get down real quick
Number one, the aerial,
the antenna that you see
that's bent,
that's a transmitting antenna
So it wasn't making
It's supposed to be retracted
when they're diving
So he was too busy to do that?
Everything stopped
We've got the 20 millimeter gun
that should have been locked in
position for underwater travel
It's swung out to port
The periscope never came
back down all the way
You can almost, you know,
see these men
are running to the forward end
of the submarine
trying to get the bow heavier,
trying to get it down,
because they knew
trouble was coming
And they didn't make it
They didn't make it
It does appear the sub
was running for its life
But so far, they see no sign
of the tell-tale fractures
in the hull
that two rounds of depth charges
should have produced
The wreck seems
surprisingly intact
And then, something strange
Now, that's not normal
Could you stop right there,
Will, and zoom in on that?
Ballard zooms in,
looking for the bow,
the front of the sub
It appears to be buried
in the sand, but it's not
It's completely gone
There's no way a depth charge
could have sheared off the bow
of U-166 like this
So what happened?
The missing bow holds
vital clues
We gotta go find the other piece
The ROVs move out
across the sand
For many meters, there's nothing
Then suddenly
It's the missing bow
And it's been reduced
to scrap metal
This is definitely not
a depth charge
If that was a depth charge,
we would not see
this thin lattice work
This would've been
totally blown away
Normally, a depth charge
just cracks the pressure hull
But this is no fracture;
it's an amputation
Most of the time,
we see concave indents
from depth charges
We don't see twisted
and torn metal
With this level of destruction,
it makes it difficult
to ascertain what caused what
It's a conundrum
The location supports Claudius's
claim that he sank this boat,
but the damage doesn't match
a normal depth charge attack
like the one Claudius made
To understand what happened,
the team needs to put the two
pieces of U-166 back together
We know that we've got this
up in the bow, separated,
and then we don't know how much
Well, you know,
we take the two pieces
and we see how much of it we see
Put them together
and you see what you're missing
But the visibility is too murky
to image the entire wreck
in one shot
We can't see very far underwater
I mean, if you're lucky
you can see 30, 40 feet
Fortunately, Ballard's ROVs
are equipped
for just such conditions
What we'll do now is
we've now outlined, and so
we need to bring Clara up
Is Clara in the ready?
So we can digitize
this whole thing
Clara Smart is the team's high
resolution mapping specialist
As she watches, the ROV
does a sweep of the wreck,
taking thousands
of close-up photographs
with its ultra-high
resolution cameras
The vehicle takes one image
every three seconds,
and what we're going to do is
we're going to combine
all these images to create
One
One very big, beautiful image
You can see it's marching along
Yep, and it's just matching
one picture to the next
The whole idea overall is
when we are on a site,
we have a flashlight
in a hay field
and you can't see anything,
but once we make these maps,
all of a sudden,
like all the lights came on
so we truly see exactly
what's down there
Clara will spend
the next several months
stitching
the thousands of close-ups
into a single giant wide shot,
called a photo mosaic,
that shows the entire wreck
Every rivet and crack will be
visible with unmatched clarity
Here, we're able
to get a picture
you can't get any other way,
a map that shows you
what it would look like
if you could take the water away
And that'll help tell us
what happened to the submarine
Back at the University of Rhode
Island, Clara gets to work
To start,
computers assemble the images
But they can only do so much
As you can see,
we've got some issues
In problem areas,
Clara will have to match
individual frames by eye
It's a laborious process
Finally,
Ballard calls Richie Kohler
and historian Marty Morgan
to his lab
The mosaic of U-166 is complete
Thousands of photographs have
been seamlessly meshed together
But will the mosaic give
the team what they need?
We took about 2,000 images
with the ROV,
and that's been boiled down
to these two mosaics
So this is really CSI
We're talking
about 2,000 pictures
to give us one continuous image
of what the U-166 looks like now
Right, and it would be
as if you were flying over it
with an airplane and you saw
an aerial view
The key evidence lies
somewhere in the break
between the two pieces
That's where it all took place
The fact that this has been
completely blown off
And 100 meters away
And 100 meters away
You know, the question is,
was the depth charge
enough power
to literally tear off
the front of a pressure hull?
It's not really been seen before
In almost every instance
So you're led to believe
that there was another culprit
in the mix
When the two pieces of U-166
are slid back together,
they see that the break occurred
right at the forward
torpedo room
Interesting enough,
right here, where my finger is,
is exactly where the torpedo
tubes would have been loaded
You can see them clearly
in the blueprints
We know they're there
But something destroyed
the torpedo tubes
And there's how many
torpedoes here?
There could have been four
Four on the deck,
four spare reloads
Spare torpedoes
were stored on the floor
of the two torpedo rooms,
bow and stern
If the forward torpedoes
somehow exploded
while stored inside U-166,
that could explain the
incredible damage to her bow
If that is what happened,
it points to an unlikely
and catastrophic chain of events
As U-166
frantically dove to escape,
Commander Herbert Claudius
dropped his depth charges
So they were pretty shallow
Well, they were seen on the
surface with their periscope up
This is what has led me
to believe the possibility
of one of the five depth charges
that were distributed by PC-566
landed on the deck there
And it carried it with 'em
Marty Morgan believes
a depth charge landed
directly on top of U-166
As the sub dove to escape,
she carried the bomb down
to its explosion depth,
setting off a chain reaction
that detonated her own torpedoes
That would make sense because
clearly it was so instant,
he's just putting
his periscope down
His dive angle isn't that great
He probably wasn't even
30 feet deep
Right, so it very conceivably
landed on him, clunk,
and he carried the bomb
Carries it down with him
Hustling forward
to weigh down the bow,
the crew might have run right
into the exploding torpedo room
If you understand how the German
submarines would dive,
one of the things they would use
the crew for is ballast
They would tell the crew to run
"Everyone
run to the front!"
And that's exactly
where it happened
The team is convinced
While a depth charge
couldn't produce the damage
seen on U-166, it could have
detonated her torpedoes
Combined with the U-boat's
location,
it makes a persuasive argument
Instead of being reprimanded
for his attack,
Commander Herbert Claudius
should have gotten a medal
Nice shot
Perfect shot, actually
Couldn't have done it better
But the team still faces
a huge hurdle:
convincing the US Navy
Ballard, a former
Navy commander himself,
puts their findings in writing
and forwards them to
the Chief of Naval Operations,
the most senior officer
in the Navy
73 years after the battle,
the Navy agrees
to review the case
Though it wasn't apparent
in 1942,
even as U-166
sank to the bottom,
Operation Drumbeat
was already drawing to a close
The sinking of 166
This is the first time we
actually,
in the Gulf of Mexico,
drew blood
Didn't mean that we had
taken the teeth away
from the U-boats
No, they were going
to continue to sink ships,
but now it was going
to cost them,
it was going to cost them dearly
Allied science and engineering
were finally beginning
to turn the tide
Improved radar and
high-frequency direction-finding
meant the U-boats
could be detected
whenever they surfaced,
even at night,
while mass production of
aircraft like the B-24 Liberator
meant the Atlantic Gap
was no longer a safe haven
for the Milk Cows
But the decisive stroke came
with the capture of U-559
in October of 1942
What they get out of U-559
enables Allied codebreakers
to regain that insight
into the new Enigma machine
with its fourth rotor
And by the end of December 1942
and certainly
by the spring of 1943,
the British and Americans
can now read German U-boat
signals in almost real time
The Enigma code
was cracked once again
The U-boats had lost nearly
all their advantages
Even the Nazi spies
of Operation Pastorius,
landed via U-boat
to sabotage American industry,
proved to be utter failures
All eight operatives
were captured within days,
and the Germans
canceled the program
Never again would U-boats
rule the seas
They had failed
in their stated goal:
cutting off the flow of supplies
from America to England
Yet they had come
dangerously close,
and the damage caused
by their attacks was immense
Hitler's U-boats sank 609 ships
in American-protected waters
Over three million tons of cargo
never made it to Britain,
and over 5,000 lives were lost
On the German side,
out of the 743 U-boats
lost in World War II,
only ten were sunk
in American waters
Of those, only one was sunk
in the Gulf of Mexico: U-166
But will the Navy give credit
to Commander Herbert Gordon
Claudius?
At the Navy History
and Heritage Command,
historians have analyzed
Ballard's evidence,
as well as reports
from the marine archaelogists
that first IDed U-166
The two teams are nearly
lockstep in their conclusions
It was Commander Claudius and
his naval escort ship PC-566
The Underwater
Archaeology Branch
here at Naval History
and Heritage Command
looked at the information
and confirmed that absolutely,
we believe that
PC-566 did successfully
attack and sink U-166
Whether it was skill,
whether it was luck
or a combination of both,
they were successful in the end
In 2014, 72 years
after the battle,
Admiral Jonathan Greenert,
chief of naval operations,
and Secretary of the Navy
Ray Mabus
award Commander Herbert Claudius
the Legion of Merit
Good afternoon, everybody,
and we're here to recognize
and actually to honor
Lieutenant Commander
Herbert G Claudius
This is really for me a story,
I think, of history obviously,
but also a story of explorers,
of shipmates,
of friends, of historians,
and I think relentlessness
to set the record straight
Gordon Claudius,
the only surviving child
of Herbert Claudius,
is here to accept the award
on his father's behalf
Now, 70 years later,
because of technology,
we now know that your father's
after-action report
was absolutely accurate
And I think this is
a good example of,
"It's never too late
to set the record straight,
it's never too late
to do the right thing"
So it's an honor
to be here today
to present your father
posthumously
with the Legion of Merit
for valiant actions
during a very tough and very
dangerous combat situation
On behalf of your father
Thank you
I present this to you
with the V for Valor,
which means it happened
in combat
It sure did
This really brings closure
on a story that began
a month before I was born
73 years ago
So this is a wrap, a nice wrap
So long after the conflict,
World War II is fading history
Few remember the battles
Herbert Claudius
and other heroes once fought
so close to our shores,
but the sunken remains
are still there,
often nearer than we know,
enduring reminders
of just how close the Nazis came
to setting history
on a very different path