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| Pierre-Julien Gilbert's dramatic painting Combat de la Cordelière shows the ill-fated clash between the two ships |
Instead of Cousteau's old minesweeper Calypso, it is the French culture ministry's surveillance ship André Malraux and its doughty crew of scientists and divers.
Today's adventure: to locate, excavate and eventually raise the wrecks of the Cordelière and the Regent - two behemoths of the Tudor seas that sank together in the Battle of Saint-Mathieu in 1512.
And filling the Cousteau role is Michel L'Hour, marine archaeologist extraordinaire and veteran of a thousand missions to explore France's underwater heritage.
"I have been obsessed with finding these ships for 40 years," he says, ruddy-faced and bearded like any proper sea-dog.
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| Seasoned marine archaeologist Michel L'Hour hopes to bow out once the ships are found |
How the two ships were sunk
For the French, or rather for the people of Brittany, the Cordelière has mythic status. She was the flagship of the duchy's last independent ruler and revered heroine, the Duchess Anne.
And she was captained up until the moment of sinking (and his death) by another Breton hero, Hervé de Portzmoguer, a kind of patriot-corsair. His Frenchified name Primauguet is still given to vessels of the French navy to this day.
But the English have a hand in this tale too.
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| The André Malraux's crew scour the ocean floor with remote-controlled vehicles |
If anything, the Regent was the bigger ship. And if Henry VIII's Mary Rose is anything to go by, then this would be a stupendous find indeed.
The trouble is no-one knows exactly where the Battle of Saint-Mathieu took place.
It was during one of the lesser-known wars between England and an alliance of France and a still-independent Brittany.
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| Hundreds died as the two ships caught fire and went down together |
But the Cordelière and two other ships stayed to fight off the attack. The Regent bore down on the Cordelière and for two or three hours there was close-quarters fighting. But then, and no-one knows why, it all ended with a massive explosion.
The two ships, entangled in battle, sank together to the bottom. Hundreds died.
Out there, somewhere
With backing from the French government, the Brittany region, universities and industry, Michel L'Hour has assembled a multidisciplinary team to find what he knows must be down there somewhere.
Tides and currents have been recalculated. Previous efforts had failed to spot that the calendar changed in 1582.
Naval charts of the sea floor have been re-examined. Historians are looking through the few contemporary accounts of the battle, and the search is on for clues from parish and other archives.
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Christophe Cerino, of Brittany-South University, says diplomatic records in the UK will be a particular focus.
"We know that several hundred Englishmen were on the Regent, and many were of noble families. After the battle their bodies will have washed up somewhere on the coast and been given burial," he says.
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| Research is based on the scant records available and the team is searching for more |
"Somewhere in the archives there are bound to be requests from noble families asking for the repatriation of these bodies. Those requests will contain names of places and parishes.
"Knowing where the bodies washed up, and the state of the currents, we may get a clearer picture where the battle took place."
Close, but no warship
For now Mr L'Hour is working on the theory that the French fleet was anchored near the goulet on the southern side of the outer bay, near the village of Camaret-sur-Mer.
This is based on a contemporary report that it was sheltering from a southerly wind, or auster.
The battle, he thinks, must have taken place in waters to the north of Camaret. So that is where the André Malraux is now in a back-and-forth combing operation, dragging an array of sonar and magnetic detectors.
An undersea robot sends back video, and divers are ready to explore any find.
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| Video footage from the unmanned vehicles is pored over by the team back in the control room |
In fact, within the first days there has already been an interesting discovery.
A wreck has been located that is in the right zone.
It is big, and Mr L'Hour can tell from its clinker-built construction (with overlapping planks) that it is from the 15th or 16th Century.
At one point it even looks like there might be two wrecks lying together, which would be a clincher.
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| A fascinating discovery - but not the one the team was hunting for |
But, alas, doubts set in. If this is a warship, where are the cannon?
There are apparently none, which means it is probably only a commercial ship. An important find, but not the one they were looking for.
Michel L'Hour is convinced that with all the technology now available the wrecks of the Cordelière and the Regent will eventually be found. And afterwards who knows? The dream is of a museum in Brest.
As for the Cousteau comparison, Mr L'Hour - who knew him - is bemused.
"You know that Cousteau was a hopeless archaeologist. At one of his excavations in the Mediterranean, he completely failed to spot that he was dealing with not one shipwreck but two, one lying on top of the other.
"It was because of the mess he made, that the ministry created our outfit - the first ever government-funded undersea archaeological survey ship.
"But the team, the camaraderie, the seamanship - that I would be proud to share."
The hunt goes on.
