Monday, April 18, 2016

500 years later, sunken pirate ship from explorer Vasco da Gama's fleet discovered

Vasco de Gama sailed the seas during the Age of Discovery,
the same period that Columbus “discovered” the Americas.
This shipwreck is infamous and a whopping five hundred years old. 

From National Geographic  by Kristin Romey & Live Science by Megan Gannon

Shipwreck From Explorer Vasco da Gama's Fleet Discovered March 15, 2016 - After 18 years of research, excavations and archaeological analysis, National Geographic grantee David Mearns has successfully discovered one of Vasco da Gama's ships lost at sea in 1503 off the coast of present-day Oman. Together with the Oman Ministry of Heritage and Culture and over 50 crew members they found thousands of artifacts including gold coins, canonballs, ceramics, and a ship's bell that helped them confirm the age and provenance of the ship.

Vasco de Gama's fleet
Portuguese navigator Vasco da Gama found a sea route to India in 1498, becoming the first European to reach Asia by sea and ushering in an era of Portuguese imperialism.
Da Gama secured a monopoly on the valuable spice trade, terrorizing coastal cities and vessels along the way.
(In one infamous story, da Gama torched a pilgrim ship carrying more than 300 Muslims—including women and children —returning from Mecca.) 

When Oman's Ministry of Heritage and Culture recently announced the discovery of a 500-year-old shipwreck from the fleet of famed explorer Vasco da Gama, it marked the culmination of an 18-year archaeological search and recovery effort led by self-described "shipwreck hunter" David Mearns of Blue Water Recoveries Ltd.  

 During da Gama's second voyage to India (1502-1503),
his uncles Vicente and Brás Sodré were in charge of a five-ship squadron.
They had specific instructions to provide military cover for friendly trading states on the west coast of India and to disrupt Arabic shipping along the route, Mearns told Live Science, but they disobeyed their orders and instead went to the Gulf of Aden, where they carried out a campaign of piracy.

After sacking and killing everyone on five Arab ships (and keeping much of the loot for themselves), the Sodrébrothers needed to make repairs.

 Al-Hallaniyah island with the GeoGarage platform (NGA chart)

They took shelter in a bay at Al-Hallaniyah, the largest of the Khuriya Muriya Islands, located about 28 miles (45 kilometers) off the southern coast of Oman.
"They were friendly with the Arabs [on the island] and trading with them —maybe too friendly with their wives, it seems from the archives," Mearns said.
The Portuguese ships were anchored in a bay that was protected on all sides—except the north.

When the local fishermen knew there was a strong wind coming from the north, they told the Portuguese sailors to get on the other side of the island.
But, believing their iron anchors to be strong enough to withstand the storm, the Sodré brothers didn't heed the warnings.
The wind came, and the ships' moorings were torn away.
Brás Sodré's ship, nau São Pedro, ran hard aground, but Vicente's ship, nau Esmeralda, sank in deeper water, killing him and everyone else on board.
Another captain from the squadron recounted the disaster in great detail in a letter to the Portuguese king, and the story has been retold in many histories.
"It was a very rich and well-told story, which is great for archaeology," Mearns said.

"You usually don't have that luxury."


Map of the Portuguese discoveries

That story led Mearns to the northeastern coast of Al-Hallaniyah in 1998.

During the initial investigation, he said he found more than 20 large stone cannonballs sitting right on the surface of the seabed.
Mearns and his Omani partners then conducted more thorough archaeological surveys and excavations in 2013, 2014 and 2015.
They found hundreds of artifacts, including copper-alloy barrels, a number of stone shots, gold coins, West African and Asian ceramic pots and stone beads, he said.

"Where most archaeologists study wrecks that have already been found, with this one we actually set out to find it," he says, beginning with an eyewitness account of the Esmeralda, the ship of da Gama's uncle, Vincente Sodré, sinking in the waters off of Al Hallaniyah Island in the Arabian Sea. 
The project team, a partnership between Oman's Ministry of Heritage and Culture and Blue Water Recoveries and supported by the National Geographic Society Expeditions Council, spent three seasons mapping and excavating the wreck site.
The remote location and complexity of the shipwreck required a wide array of technology—from magnetometers and differential GPS, to airlifts that work like "underwater vacuums"—and a number of specialists to operate it.  
To examine some of the shipwrecks' corroded artifacts, the team turned to high-tech methods.
They used CT scanning to identify two silver coins: the Manuel índio, minted in 1499; and the real grosso, minted sometime between 1475 and 1479.
Portuguese King Dom Manuel I ordered the índio to be struck after the return of da Gama's first voyage to India, specifically to be used in trade with India.
As there is only one other known índio in the world (housed at the National Historical Museum of Brazil), this coin has reached legendary status in the coin-collecting world, Mearns and his colleagues wrote.

 Loss of Esmeralda as per Livro das Armadas

CT scans were also used to get a better look at a bell (which was wrested from under a boulder in shallow water) and found that it was inscribed with the numbers "498."
The researchers suspect that perhaps the "1" eroded from the manufacture date of 1498; that would chronologically fit with Sodré's squadron, which left Lisbon in 1502.
"It's very possible that that could be the oldest ship's bell ever found in the world," Mearns said. "And it was found less than 100 meters [328 feet] off a shoreline, in a depth of water that you could have snorkeled to. As small as the world is, there are still places left to explore."

 After recent underwater excavations and careful analysis of more than 2,800 artifacts, including cannonballs and rare coins, the researchers are now fairly certain they have found the nau Esmeralda, the doomed ship commanded by da Gama's uncle.
Shown here is a copper alloy disk, marked with the Portuguese royal coat of arms.


Take a behind-the-scenes look at what it took to locate and excavate the earliest shipwreck we have from Europe's Golden Age of Exploration.  

The findings were published online March 14 in the International Journal of Nautical Archaeology.
 


Sunday, April 17, 2016

Netherlands NLHO update in the GeoGarage platform

19 nautical raster charts updated

What are ocean zones and high seas? A cartoon crash course


To the naked eye, our oceans look like a huge, endless expanse of water.
In actuality, they’re divided into zones and areas, similar to how land is segmented into countries and states.
From your country’s shores to the lawless high seas, see how the vast global ocean is made up of smaller zones.
Cartoonist Jim Toomey—whose daily comic strip, Sherman’s Lagoon, is syndicated in more than 250 newspapers in the United States—has joined forces with The Pew Charitable Trusts to illustrate "ocean zones" and other terms associated with our oceans 

Get the facts about the high seas—the two-thirds of our world’s oceans that are not under any country's jurisdiction.
This quick whiteboard tutorial explains why these international waters are so important and how the United Nations can help protect high seas marine life and ocean resources.

Saturday, April 16, 2016

Imoca 60 in the storm

Vincent Riou training for the Vendee Globe, offshore from Ile de Groix


Photos from Benoît Stichelbaut

Friday, April 15, 2016

Nessie found : film's lost monster prop found in Loch Ness

Time after time the search has been made, and time after time, they've all come back empty handed. However this week, Kongsberg Maritime Ltd, the UK division of Kongsberg Maritime, has achieved the unimaginable and uncovered the elusive Nessie.
That is, the long lost model of Nessie which was used during filming of 1970's "The Private Life of Sherlock Holmes".

From BBC by Steven McKenzie

A 30ft (9m) model of the Loch Ness Monster built in 1969 for a Sherlock Holmes movie has been found almost 50 years after it sank in the loch.
The beast was created for the Billy Wilder-directed The Private Life of Sherlock Holmes, starring Sir Robert Stephens and Sir Christopher Lee.
It has been seen for the first time in images captured by an underwater robot.
Loch Ness expert Adrian Shine said the shape, measurements and location pointed to the object being the prop.

An underwater robot detected the Nessie model during a survey of parts of Loch Ness 

 Another of Kongsberg Maritime's images of the lost Nessie model

The robot, operated by Norwegian company Kongsberg Maritime, is being used to investigate what lies in the depths of Loch Ness.

 Loch Ness with the GeoGarage platform (UKHO charts)

VisitScotland and Mr Shine's The Loch Ness Project, which gathers scientific information on the loch's ecology and the potential for a monster, is supporting the survey.
Mr Shine told the BBC News Scotland website: "We have found a monster, but not the one many people might have expected.
"The model was built with a neck and two humps and taken alongside a pier for filming of portions of the film in 1969.
"The director did not want the humps and asked that they be removed, despite warnings I suspect from the rest of the production that this would affect its buoyancy.
"And the inevitable happened. The model sank."

 A computer generated image of the film prop based on the scan made by the drone 

Mr Shine added: "We can confidently say that this is the model because of where it was found, the shape - there is the neck and no humps - and from the measurements."
The model was floated out to a place in the loch where only a few months earlier claims of sighting of Nessie had been made.

 The long lost model of Nessie used during filming of the 1970's "The Private Life of Sherlock Holmes".

 A still from the movie showing the new prop made following the loss of the 30ft version

The Private Life of Sherlock Holmes was made in the US and UK in 1969 and released in cinemas in 1970.
It was directed by Billy Wilder, a famous figure of Hollywood's "golden age" whose long catalogue of features included Some Like It Hot starring Marilyn Monroe.
The Sherlock film tells of the detective investigating the disappearance of an engineer. The case takes him to Loch Ness and an encounter with a monster.
Sir Robert Stephens played Holmes, Colin Blakely was Dr Watson and Sir Christopher Lee was the sleuth's brother, Mycroft Holmes.
Talented special effects artist Wally Veevers, whose other work included 2001: A Space Odyssey, Superman and Local Hero, led the building of the 30ft-long Loch Ness Monster.
It sank on its first outing on the loch while being towed behind a boat.
Wilder is said to have comforted Veevers after watching his creation disappear beneath the waves.
The director, who had also been dogged with problems lighting scenes at Loch Ness, had a new monster made - but just its head and neck - and moved the filming to a large water tank in the film studio.

Kongsberg's torpedo-shaped Munin drone is equipped with sonar imaging and has already made several sweeps of the loch's bottom.
Among other material the drone has already detected have been the wreck of an unidentified sunken boat.
However, measurements made using the device dispute a claim made in January of a new deepest point in the loch.
A tour boat skipper Keith Stewart recorded a depth of 889ft (270.9m) on sonar equipment he uses.
The official maximum depth, which still remains in place, is 754ft (229.8m).

Kongsberg's robot Munin 

 The survey work continues with the drone

 An image of the sunken boat found during the survey 

Kongsberg's survey work forms part of Mr Shine's ongoing called Operation Groundtruth,
Malcolm Roughead, chief executive of VisitScotland, added: "No two areas around or on the water feel the same - whether it is a sense of awe at the beauty of the scenery or a feeling of anticipation at what might surface from below the waters.
"We are excited to see the findings from this in-depth survey by Kongsberg, but no matter how state-of-the-art the equipment is, and no matter what it may reveal, there will always be a sense of mystery and the unknown around what really lies beneath Loch Ness."

 The latest survey challenges a recording of a new deepest point in the loch 
People have been searching for the Loch Ness monster for centuries.
Now you can explore for yourself in Google Maps.

Links :