Showing posts with label marine. Show all posts
Showing posts with label marine. Show all posts

Monday, August 3, 2015

The search for Malaysia Airlines Flight 370 : debris discovery 'consistent with ocean currents from search area'


Possible MH370 clue rode ocean currents
Here's how wreckage from Malaysia Airlines Flight 370 could have floated thousands of miles away from the search area off the coast of Australia

 From Reuters by Lincoln Feast and Jeffrey Dastin

Vast, rotating currents sweeping the southern Indian Ocean could have deposited wreckage from a missing Malaysia Airlines passenger jet near Africa, thousands of kilometres from where it is thought to have crashed, oceanographers said on Thursday.

French authorities are studying a piece of plane debris found on Reunion Island, off the east coast of Madagascar, to determine whether it came from Flight MH370, which disappeared without a trace 16 months ago with 239 passengers and crew on board.

If confirmed to be part of the missing Boeing 777, experts will try to model its drift to retrace where the debris could have come from, although they cautioned it was unlikely to help in narrowing down the plane's final resting place beyond the vast swathe of ocean off Australia that has been the focus of the search for months.

"This wreckage has been in the water, if it is MH370, for well over a year so it could have moved so far that its not going to be that helpful in pinpointing precisely where the aircraft is," Australian Deputy Prime Minister Warren Truss told reporters.
"It certainly would suggest the search area is roughly in the right place."

Australia has been leading a search for the plane since analysis of a series of faint satellite "pings" from the aircraft led investigators to conclude that it crashed in the stormy southern Indian Ocean about 2,000 km southwest of Perth.

Ocean current models

Models of ocean currents were consistent with the potential discovery of debris in the tropics, roughly 3,700 km to the northwest, oceanographic experts said.

A huge, counter-clockwise current, called a gyre, covers much of the southern part of the 70.5 million sq km (27.2 million sq miles) Indian Ocean, running east along the Southern Ocean near Antarctica, up the west Australian coast and westward below the equator towards Reunion and Madagascar, before turning south.

 Marked by the green circle, Reunion Island is visible in this map highlighting the complexity of eddies and gyres in the Indian Ocean.
Embedded in overall broad ocean currents are small eddies that create turbulence and make it complicated to track the flow of potential debris.
source : earth.nullschool.net
 
On the basis of the aircraft debris that was found on 29 July on the island of Réunion, hydrodynamic experts of Deltares produced a simulation model that indicates that the northern part of the search is now a more likely source of the debris.


Debris tracking flight MH370 based on ocean currents

Deltares experts Maarten van Ormondt and Fedor Baart used a particle tracking routine to compute the movement of debris from different locations in the search area.
The calculation was made using surface currents (assuming that they are the most relevant for the floating debris) from the global HYCOM model.
The results show how debris moves with the counter-clockwise gyre in the Southern Indian Ocean and quickly disperses over large areas.
Particles released in the northern section of the search area arrive at the African coast first within a year of the release time.
Those released in the southern section do not travel as far and do not make it to Africa within the simulation period.

 Average surface currents since the disappearance of MH370. Colors have been Zissoufied and indicate current speed. Arrows show current direction and larger arrows = faster currents.
source : Dr Martini

 Ocean currents in the search area : shows the east to west flow of the Indian Ocean gyre, one of five such major surface currents on Earth. 

Maarten van Ormondt (a Deltares hydrodynamic expert): ‘The model shows us that the ocean currents are able to carry the debris from the search area west of Australia to Réunion. It also suggests that it is more likely that the debris originates from the northern section of the search area than from the southern part.”

Erik van Sebille, an oceanographer at Imperial College London, said that, if the debris on Reunion was indeed from MH370, his modelling suggested the aircraft went down in the north of the search zone.
"This westward drift from near Australia all the way across the Indian Ocean can really only happen if the plane went into the water relatively close to the equator," he said.
Finding more debris would help triangulate where MH370 may have hit the water, he added.

 Another computer model developed by Erik van Sebille, an oceanographer at the Imperial College in London, uses historical ocean currents data to predict the probable paths that objects could take drifting through the ocean over the course of several months.
This map shows the model's predictions for an object washing up on the island of Réunion.

Pattiaratchi's modelling shows debris could also drift also as far east as Tasmania or beyond.
"Our model results that we did last year predicted that within 18-24 months after the crash, it was a possibility that it would have ended up within that region," said Charitha Pattiaratchi, Professor of Coastal Oceanography at the University of Western Australia.
The point of origin "will definitely be in the Southern Hemisphere, it would be to the east, it would cover definitely the area of the physical search at the moment", he added.
That physical search, now halfway to being completed, covers 120,000 sq km of sea bed.

 Oceanographers created this chart one year ago showing the potential drift of MH370, starting from the Indian Ocean search zone.
Scientists at The University of Western Australia say there is a consistency between the current search area at Reunion Island and where debris from missing Malaysian Airlines flight MH370 could have drifted to, based on their research.
source : UWA 
Barnacle clues

Dave Gallo, who co-led the search for Air France Flight 447 that crashed in the Atlantic Ocean in 2009, warned that retracing the debris' drift through sea-current models could lead investigators astray.
"Retro-drifting" from wreckage found just five days after the Air France crash led to no breakthrough, he said.
"We spent two months in that area and found absolutely nothing. That brought mistrust from the industry," said Gallo, director of special projects at the Woods Hole Oceanographic Institution. "Looking at something that is 500 days old is going to be tough."

France's BEA crash investigation agency raised questions in 2012 over the reliability of such "reverse drift" calculations after conducting tests during the search for AF447.
It had asked the French Navy to drop nine buoys at a single spot in the Atlantic, only to find they scattered hundreds of miles apart, highlighting the "great difficulty" of predicting drift.
Experts say such divergences can increase over time.

Still, further clues might yet come from the debris.
Experts can age the barnacles that attach themselves to flotsam, which would give an idea of how long it had been in the water.
They may even be able to tell which part of the ocean it has come from by the species of barnacles attached.
"There's different barnacles in different parts of the ocean, so you might expect some CSI scenario where just by looking at the barnacles, you can pinpoint where it came from," van Sebille said.
 

Sunday, August 2, 2015

Rolling the Deep - Papua New Guinea


Eastern Papua New Guinea is one of the last unspoiled diving destinations in the world.
The diversity of life in this region is staggering.


This episode of the Rolling the Deep series focuses on the small critters of the area.
The colors and textures of these animals is an amazing and beautiful sight.
Enjoy! 


Nudibranchs are generally small, a bit like a traditional slug.
But these slugs are much more interesting that the ones we find in the garden.
The different shapes, colors, and sizes make each species of nudibranchs unique.
Hopefully with this video that is up close and personal with the nudi's, you gain the appreciation for their beauty.

Saturday, August 1, 2015

First flights off Lorient


A genuine test laboratory, in the space of six months the Multi70 Edmond de Rothschild has become the perfect guinea pig for Gitana Team’s design office.
After an initial research phase involving T-foil rudders, which was validated by Sébastien Josse’s third place in the Route du Rhum 2014, it’s now time for the second phase of development.
Equipped with asymmetric foils (L-foil to port and C-foil to starboard) and new, more substantial T-foil rudders, the 2015 version of the trimaran fitted out by Baron Benjamin de Rothschild is undergoing her first sea trials offshore of Lorient; the first flights in real conditions."

Friday, July 31, 2015

Full moon today is a Blue Moon: Here's why

The second full Moon of July is just around the corner.
According to modern folklore, it is a "Blue Moon."
NASA

From Space by Geoff Gaherty

On Friday, much of the world will have the opportunity to observe a Blue Moon: A somewhat rare occurrence that doesn't have anything to do with the moon's color.

During most years, the Earth experiences 12 full moons, one in each month.
But some years, such as 2015, have 13 full moons, and one of those "extra" lunar displays gets the label of Blue Moon.
The lunar or synodic month (full moon to full moon) averages 29.530589 days, which is shorter than every calendar month in the year except for February.
Those extra one-half or one-and-one-half days accumulate over the year, causing some years to have 13 full moons rather than 12.

The phenomenon has more significance for astrologers, people who claim they can glean meaning from the movement of the stars, than for scientific astronomers. 
A blue moon traditionally marks a time of change and possibility in the astrological world.
This is only one type of blue moon, however. 
Another definition states that blue moons are “seasonal” and therefore only blue if they are the third of four full moons in one season.
This would mean that the next seasonal blue moon would actually occur on May 26, 2016.

To see what I mean, here is a list of full-moon dates in 2015: Jan. 5, Feb. 3, March 5, April 4, May 4, June 2, July 2, July 31, Aug. 29, Sept. 28, Oct. 27, Nov. 25 and Dec. 25.
In 2016, the first full moon falls on Jan. 23, and each calendar month has only one full moon.

The expression "once in a blue moon" has a long history of being used to describe rare events; but it was also used in the Maine Farmers' Almanac to describe the third full moon in a season that has four (normally, a three-month season will only have three full moons).

The blue moon is the first since August 31, 2012, and won’t be seen again until January 31, 2018.
Next in 2018 : twice the same year
Year    Month    First Full Moon    Blue Moon
2018    January    2nd at 02:25    31st at 13:27
2018    March    2nd at 00:50    31st at 12:35

In 1946, Sky & Telescope magazine published an article that misinterpreted the older definition, defining a Blue Moon as the second full moon in a calendar month.
This has become the most recent and perhaps most widely accepted definition of a Blue Moon.
And hence, the full moon on July 31 is referred to as a Blue Moon, because it was preceded by the full moon on July 2.
By this definition, a Blue Moon occurs roughly once every 2.7 years.
The full moon appears to last for at least the length of one night, but technically speaking, it is an instantaneous event: It occurs when the sun, Earth and moon fall close to a straight line.
It takes place at the same instant everywhere in the world, whether the moon is above or below the horizon.

The full moon on July 31 occurs at exactly 6:43 a.m. EDT (1043 GMT).
So, when you look at the Blue Moon on Friday morning, don't expect to see a different color scheme (although it is possible for the moon to appear to have a bluish hue).
Just be aware that the so-called Blue Moon is a byproduct of the contrast between the calendar month and the lunar month.

Thursday, July 30, 2015

Dokdo island: A case study in Asia's maritime disputes

 A map issued by the Japanese Army in 1936, left, shows Dokdo drawn within Korean territory.
But Japanese scholars have argued that for convenience’s sake, Dokdo was depicted near Korea.
A similar map drawn up the next year, right, directly names Joseon, the name of Korea at the time, where Dokdo was categorized.
Provided by Cultivate Korean Culture

From Statfor

This travelogue from the disputed island of Dokdo, also known as Takeshima, was written by a Stratfor analyst traveling in South Korea.

 The Liancourt Rocks, also known as Dokdo or Tokto with the GeoGarage platform (NGA chart)

Dokdo is a small island - really a couple of small islands grouped closely together.
Sparsely vegetated, these jagged remnants of an extinct volcano support a local fisherman's family and a contingent of South Korean police officers.
They also lie at the heart of a historical and geographical controversy between South Korea and Japan. Seoul controls the islets and calls them Dokdo.
Tokyo, however, contests that claim and calls them Takeshima.


(North Korea, too, claims Dokdo, but as an extension of its broader claim over all Korea, and Pyongyang does not contest Seoul's active control.)


In spite of the controversy, visiting Dokdo was not difficult, just time-consuming.
The overnight train from Seoul arrived in Jeongdongjin, on the east coast of South Korea, half an hour before sunrise.
In the pre-dawn light it was easy to see the soldiers as they moved in line abreast formation across the beach down to the edge of the sea, undertaking the morning patrol for suspicious activity.
Although we were over 100 kilometers (60 miles) south of the Demilitarized Zone, we were just south of the town of Gangneung.
It was there that in 1996, a North Korean infiltration submarine became stranded offshore and the crew headed inland, eluding South Korean forces for more than a month.

 A South Korean flag flies over the disputed island of Dokdo/Takeshima. (Stratfor)

To get to Dokdo, we took the ferry from Gangneung to Ulleungdo, the farthest east of South Korea's larger islands.
From Ulleungdo, weather permitting, it is another hour-and-a-half ferry ride to Dokdo. For South Koreans, journeying to the island is the pinnacle of patriotic tourism.
Once they disembark, flag-waving visitors remain about 40 minutes on the pier on the easternmost of the two main islets.
The eastern islet also has the police guard station and a helipad.
The western islet hosts the home of a local fisherman, the only permanent resident.


From Ulleungdo to Dokdo is 47 nautical miles, and South Korea considers Dokdo within the jurisdiction of Ulleungdo.
Japan considers what it calls "Takeshima" part of the administrative district of the Oki Islands, around 85 nautical miles away.
But Japan will also be quick to note that Takeshima is only 114 nautical miles from Honshu, the main island of Japan, closer than the South Korean mainland, which is 117 nautical miles away.
Tokyo and Seoul both expend major efforts to explain why they are the rightful owners of the disputed island, and each has its own historical maps and charts, documents and records to wield in debate.

At the moment, South Korea undoubtedly controls Dokdo, but Japan is challenging the legality of that occupation.
Also up for debate is whether the set of islets really even constitute an island, or simply a collection of rocks.
The United States and some other nations, after all, call the islands the "Liancourt Rocks."
The difference between an island and a rock may be open to interpretation, but it has important economic and political implications.
With ample fishing and expectations of sub-sea oil, gas and mineral reserves, this is far from a frivolous dispute, or one merely reflecting centuries of animosity and staunch nationalism.
It matters economically.

Maritime agreements, roughly stated, specify that an island must be visible above the surface at high tide and must be habitable or capable of sustaining economic activity.
The designation "island" grants the entity 12 nautical miles of territorial sea and a 322-kilometer exclusive economic zone, and it can be used in designations of continental shelves.
A rock must also be visible above water at high tide, but it does not need to support human habitation or economic activity.
A rock is granted the same 12 nautical miles of territorial sea but not an exclusive economic zone. Dokdo is home to a small population, but most of its water and food supplies (aside from seafood) are imported. South Korea says this proves it is habitable, but others disagree.

Although the competition between South Korea and Japan is in this case rather tame, Asia is littered with disputed islands, reefs, submerged rocks and shoals.
These tensions are much more significant. Chinese public animosity over Japan's claims on the Senkaku Islands (China calls them Diaoyu) triggered riots, looting and caused some Japanese businesses to leave China.
Vietnam and China have already had several military engagements over the Paracel Islands.
Chinese construction projects on several reefs and islets in the Spratly chain in the South China Sea upset the Philippines and prompted objections from Washington.
And the list continues: most Southeast Asian nations claim overlapping portions of the contiguous seas. International law offers only the most dubious help in resolving these disputes.
Geographic designations that are meant to help distinguish between the different types of landmasses are ambiguous.
This only compounds the dizzying array of competing claims.

On the other side of the Eurasian landmass, Europe is rethinking the legitimacy of borders and even the definition of nations, states and sub-nations.
In Asia, land borders may be porous at places, but they are still fairly well-defined.
It is at sea that territorial boundaries are really being reassessed.
Nationalism plays a role, as does economic security.
Nations need to guarantee access to maritime resources and to the vital trade routes throughout the region.
Asia wraps around the East and South China seas, around the Bay of Bengal and the Indian Ocean. And when water is the organizing principle of the continent, the question of who owns an island, rock or reef and even of who is allowed to name a body of water takes on national strategic significance. With a large common sea and nations with an economic ability and necessity to act, maritime competition will only grow more intense.
The flag-waving Korean tourists on Dokdo may seem far less significant than the controversial 3,000-meter (almost 10,000-foot) Chinese runway on Fiery Cross Reef, but it is no less part of a national strategy to secure economic and strategic interests in a rapidly changing region.

Links :

Wednesday, July 29, 2015

Mass slaughter of pilot whales in the Faroe islands

This footage released by Sea Shepherd conservation campaigners shows a mass slaughter of pilot whales in the Faroe islands. 


Faroese villagers have slaughtered about 250 pilot whales in the past 24 hours according to Sea Shepherd activists monitoring the traditional summer hunts in the north Atlantic islands.

No escape: Fishing boats and speed boats encircle the whales, leading them to the beaches and waiting huntsmen

The whale pods, which migrate past the islands in July and August, were herded by flotillas of small boats on to two beaches where villagers waded into the water to kill them with lances.

Massacre: The annual grindadráp takes place at the Faroe Islands, where whaling is not illegal but remains controversial

Seven protesters, mainly from European countries, have been arrested this week for allegedly interfering with the the traditional community hunts, known as “grindadráp”.

Pool of blood: The killing scree was carried out at two beaches, Bøur and Tórshavn in the Faroe Islands
Amsterdam-based direct action group Sea Shepherd, which has 36 people on two boats close to the islands and a further 20 supporters on Faroese islands, claimed on Friday that the Danish navy was helping the Faroese whalers.
Although the islands are self-governing, they are financially dependent on Denmark.

“It was perfectly clear that the Danish navy ships Triton and Knud Rasmussen were present to guard one grindadráp, and that the slaughter [only] proceeded with the full consent of the Danish navy,” said Wyanda Lublink, captain of the Sea Shepherd boat Brigitte Bardot.

“How Denmark – an anti-whaling member nation of the European Union, subject to laws prohibiting the slaughter of cetaceans – can attempt to justify its collaboration in this slaughter is incomprehensible,” he said.

Tórshavn / Nólsoy in the GeoGarage platform (NGA chart)

Footage from the hunt suggests that 111 pilot whales were killed on a beach at Nólsoy and a further 142 near the capital Tórshavn.

Carnage: The pilot whale is not an endangered species and has been hunted annually in the Faroe Islands

Whaling in the Faroes has been practiced for hundreds of years and is regulated by the Faroese authorities.
Around 800 pilot whales and some dolphins are killed annually.

Links :

Tuesday, July 28, 2015

Marine plankton brighten clouds over Southern Ocean

Satellites use chlorophyll’s green color to detect biological activity in the oceans.
The lighter-green swirls are a massive December 2010 plankton bloom following ocean currents off Patagonia, at the southern tip of South America.
Image via NASA

From NASA

New research using NASA satellite data and ocean biology models suggests tiny organisms in vast stretches of the Southern Ocean play a significant role in generating brighter clouds overhead. Brighter clouds reflect more sunlight back into space affecting the amount of solar energy that reaches Earth’s surface, which in turn has implications for global climate.
The results were published July 17 in the journal Science Advances.
The study shows that plankton, the tiny drifting organisms in the sea, produce airborne gases and organic matter to seed cloud droplets, which lead to brighter clouds that reflect more sunlight.


"The clouds over the Southern Ocean reflect significantly more sunlight in the summertime than they would without these huge plankton blooms," said co-lead author Daniel McCoy, a University of Washington doctoral student in atmospheric sciences.
"In the summer, we get about double the concentration of cloud droplets as we would if it were a biologically dead ocean."

 Tiny ocean life contribute to clouds directly, by being lofted up with sea spray, and indirectly, by producing sulfurous gas.Daniel McCoy / University of Washington
Daniel McCoy / University of Washington

Although remote, the oceans in the study area between 35 and 55 degrees south is an important region for Earth's climate.
Results of the study show that averaged over a year, the increased brightness reflects about 4 watts of solar energy per square meter.

McCoy and co-author Daniel Grosvenor, now at the University of Leeds, began this research in 2014 looking at NASA satellite data for clouds over the parts of the Southern Ocean that are not covered in sea ice and have year-round satellite data.
The space agency launched the first Moderate Resolution Imaging Spectroradiometer (MODIS), instrument onboard the Terra satellite in 1999 to measure the cloud droplet size for all Earth's skies.
A second MODIS instrument was launched onboard the Aqua satellite in 2002.

 Marine stratocumulus clouds stretched across the southern Indian Ocean in this image taken by NASA's Aqua satellite in early March 2013.

Clouds reflect sunlight based on both the amount of liquid suspended in the cloud and the size of the drops, which range from tiny mist spanning less than a hundredth of an inch (0.1 millimeters) to large drops about half an inch (10 millimeters) across.
Each droplet begins by growing on an aerosol particle, and the same amount of liquid spread across more droplets will reflect more sunlight.

Using the NASA satellite data, the team showed in 2014 that Southern Ocean clouds are composed of smaller droplets in the summertime.
But that doesn't make sense, since the stormy seas calm down in summer and generate less sea spray to create airborne salts.

 Wave clouds form over Île aux Cochons in the Southern Ocean.

The new study looked more closely at what else might be making the clouds more reflective.
Co-lead author Susannah Burrows, a scientist at the Pacific Northwest National Lab in Richland, Washington, used an ocean biology model to see whether biological matter could be responsible.
Marine life can affect clouds in two ways.
The first is by emitting a gas, such as dimethyl sulfide released by Sulfitobacter bacteria and phytoplankton such as coccolithophores, which creates the distinctive sulfurous smell of the sea and also produces particles to seed marine cloud droplets.
The second way is directly through organic matter that collects at the water's surface, forming a bubbly scum that can get whipped up and lofted into the air as tiny particles of dead plant and animal material.

 The exact boundaries of the Southern Ocean are as up in the air as its many clouds.
Credit: NASA

By matching the cloud droplet concentration with ocean biology models, the team found correlations with the sulfate aerosols, which in that region come mainly from phytoplankton, and with the amount of organic matter in the sea spray.
"The dimethyl sulfide produced by the phytoplankton gets transported up into higher levels of the atmosphere and then gets chemically transformed and produces aerosols further downwind, and that tends to happen more in the northern part of the domain we studied," Burrows said.
"In the southern part of the domain there is more effect from the organics, because that's where the big phytoplankton blooms happen."
Taken together, these two mechanisms roughly double the droplet concentration in summer months.
The Southern Ocean is a unique environment for studying clouds.
Unlike in other places, the effects of marine life there are not swamped out by aerosols from forests or pollution.
The authors say it is likely that similar processes could occur in the Northern Hemisphere, but they would be harder to measure and may have a smaller effect since aerosol particles from other sources are so plentiful.

Links :

Monday, July 27, 2015

The ultra-rich dive into a new obsession

The Triton 3300/3 is one of the most popular submersible and it can take a pilot and two passengers.

From BBC by Eric Barton

Tucked away in an industrial park in Vero Beach, Florida, 34-year-old engineer John Ramsay is painstakingly drafting a design for a submarine that will be able to reach the five deepest points in the ocean.
The catch?
It's a personal vessel for a billionaire.
“It’s going to be a world- or certainly industry-changing vehicle,” Ramsay said.
The $25m, two-man submarine will take six months to design and another two years to build by Triton Submarines.
“Nobody has built a deep-going [personal] vehicle that has been used again and again, but that’s what we are trying to do.”
His client is one of several who see the ocean depths as a new playground.
A new breed of billionaires is tapping into their inner Jacques Cousteau — the famous undersea explorer — and they're willing to pay big.
With pricetags starting at a $3m, and requiring a yacht to park on, these personal submarines are not only for adventure, but also for their owners to help advance research and exploration in ways that weren’t dreamed about a decade ago.
“Part of this trend is that it is cool to have a submarine and part of it is that a private person can support research with it,” said Charles Kohnen, owner of submarine builder SEAmagine Hydrospace Corp in California.
“This is not just an effort to go where no man has gone before. This is going where no man has gone before — and come back to tell about it.”



The way forward

Still nascent, the personal submarine industry comprises four companies that account for just 20 to 30 privately owned and manned subs across the globe, according to Kohnen, an early pioneer who sold his first sub in 2000.
These sub owners frequently offer charters, at a price often up to $30,000 a day.
Some of these vessels have been rented out by other billionaires looking for a new holiday adventure, while others have been lent to research groups to discover new sea life or explore shipwrecks.
Few research organizations can, after all, afford to buy a submarine, let alone pay for upkeep and maintenance or cover the cost of the expensive ship that's required to transport it out to sea.
So, teaming up with a private owner has proven to be one promising strategy.

In 2013, researchers traveling in a privately owned submarine off the coast of Japan filmed a giant squid in its natural habitat for the first time.
And, in March of this year, a team using submarines owned by Microsoft co-founder Paul Allen found the Japanese battleship Musashi, which had been sunk off the coast of the Philippines in World War II.
Sometimes, however, the thrill of discovery lies purely with the submarine owner.
In 2012, filmmaker James Cameron broke a record for the deepest solo dive when he used a sub he owned to explore the Mariana Trench, the deepest spot in the oceans, located in the western Pacific. Cameron’s vehicle wasn’t designed for multiple trips into the extreme pressure of deep water and was retired after its only trip.


Beautiful underwater footage filmed in February 2015 using a small personal submarine from SEAmagine
The diving took place at Cocos Island in Costa Rica in conjunction with Misión Tiburón an organization that promotes the conservation of sharks and other marine species.
The video shows the abundance of sea life at Cocos’ marine sanctuary from the shallow depths to the very deep unexplored regions where a rare Prickly Shark was found during this expedition at a depth of 340m (1115 ft).

Most private subs reach depths of 1,000m or less.
The biggest construction challenge remains the compartment that holds passengers, which become compromised when under pressure at depth.
Triton’s subs include a 6.5-inch-thick acrylic passenger bubble made in Germany at a cost of about $1m.
To go deeper, the sub must be far more durable, including a sphere of ultra-thick glass that could cost four or five times as much, Ramsay said.
Just how effective these private owners can be at research or exploration is unclear, said George Bass, professor emeritus at the Texas A&M University Nautical Archaeology Program.
Bass is one of the world’s most prolific hunters of shipwrecks, especially in the Mediterranean.
Using a SEAmagine submarine off the coast of Turkey, he once found 14 wrecks in a month.
But Bass doubts that private owners could have the same kind of luck.
“It’s possible [that private sub owners] could stumble on a shipwreck or a new discovery,” Bass said.
“But it takes a lot of research and knowledge to make that happen.”

 Crystal Cruises has announced plans for an "extravagantly appointed yacht" featuring submarines offering underwater weddings (source : The Telegraph)

In the name of science

In Costa Rica, a submarine named DeepSee is being used by adventure travellers, researchers, and scientists for dives predominantly around Cocos Island, about 350 miles off the mainland.
With its unique cross currents, the water surrounding the islands is rich with rare coral and marine life, from crustaceans to whale sharks.
DeepSee’s owner, an eponymous private company, allows researchers from the University of Costa Rica to take the sub down for free, said operations manager Shmulik Blum, and they sometimes find new sea life never seen before.

 This video is about a dive with the DeepSea Submarine to 300+ m depth at Cocos Island, Costa Rica

Two years ago, the Costa Rican researchers discovered an entire new family of coral, the kind of discovery that hadn’t been made in 40 years, Blum said.
The new, soft coral is in waters so deep that it never sees light and lacks any pigment.
Using DeepSee’s robotic arm, researchers scooped up a sample that they later analysed in the lab.
“Usually, the lack of access to waters this deep limits the ability to learn about it,” Blum said.
“Once we can get down there, it gives us access to an entirely new world.”



Blum was speaking by phone from DeepSee’s office in the small port of Puntarenas.
Hours later, he and his submersible team would be making the day and a half journey to the Cocos Island for a new set of dives.
“Maybe we’ll find something new this time too,” he said.
“You never know."

Links :
  • YouTube : Ultra-Luxury Private Submarine Comes With a Pool 
  • GizMag : DeepFlight Dragon set to usher in the era of the personal submarine

Sunday, July 26, 2015

The essence of surfing

Dreams, freedom, passion. But also fear and boundaries to break.
This is the essence of surfing.

Saturday, July 25, 2015

Image of the week : comparing two 'Blue Marble' photos of Earth


From NYTimes

On Tuesday we shared NASA's new photo of a fully illuminated Earth.
(see : NASA website : 1972 / 2015 )
This is an update to the “Blue Marble” photo taken by Apollo 17 astronauts in 1972, more than four decades ago.

Here, you can compare the two.

“How perfect North America looks. I am still amazed by how the oceans dwarf the continents,” Jim Corradino of Norwalk, Conn., wrote us.

“There’s something remarkable about a single snapshot of the Earth — an intact view of our planet in its entirety, hanging in space,” the astronaut Scott Kelly observed in an essay on Medium.
He explained what makes these images so special.
Along with the challenge of getting far enough away to get the entire Earth into a single frame, there is the matter of lighting.

“In order to view the Earth as a fully illuminated globe, a person (or camera) must be situated in front of it, with the sun directly at his or her back,” he wrote.
“Not surprisingly, it can be difficult to arrange this specific lighting scheme for a camera-set up that’s orbiting in space at speeds approaching thousands of miles per hour.”

Consequently many of the images of Earth we see are actually composites.
This is just the first in a series of images of Earth that will be sent back from a million miles away.
We will soon see the other side, fully illuminated as well.

Links :

Friday, July 24, 2015

Inside the secret world of Russia's cold war mapmakers

What is just as amazing as the number of maps churned out by the Soviet military is the fact that none of these maps are copyrighted since the Soviet Union was not a signatory to the Berne Convention on copyright.

From Wired by Greg Miller

A MILITARY HELICOPTER was on the ground when Russell Guy arrived at the helipad near Tallinn, Estonia, with a briefcase filled with $250,000 in cash.
The place made him uncomfortable.
It didn’t look like a military base, not exactly, but there were men who looked like soldiers standing around.
With guns.

The year was 1989.
The Soviet Union was falling apart, and some of its military officers were busy selling off the pieces. By the time Guy arrived at the helipad, most of the goods had already been off-loaded from the chopper and spirited away.
The crates he’d come for were all that was left.
As he pried the lid off one to inspect the goods, he got a powerful whiff of pine.
It was a box inside a box, and the space in between was packed with juniper needles.
Guy figured the guys who packed it were used to handling cargo that had to get past drug-sniffing dogs, but it wasn’t drugs he was there for.


Inside the crates were maps, thousands of them.
In the top right corner of each one, printed in red, was the Russian word секрет.
Secret.

 Yemen Topographic Map 1:200,000 Russian Soviet Military

The maps were part of one of the most ambitious cartographic enterprises ever undertaken.
During the Cold War, the Soviet military mapped the entire world, parts of it down to the level of individual buildings.
The Soviet maps of US and European cities have details that aren’t on domestic maps made around the same time, things like the precise width of roads, the load-bearing capacity of bridges, and the types of factories.
They’re the kinds of things that would come in handy if you’re planning a tank invasion.
Or an occupation.
Things that would be virtually impossible to find out without eyes on the ground.

Given the technology of the time, the Soviet maps are incredibly accurate.
Even today, the US State Department uses them (among other sources) to place international boundary lines on official government maps.

Guy’s company, Omnimap, was one of the first to import Soviet military maps to the West.
But he wasn’t alone.
Like the military officials charged with guarding the maps, map dealers around the world saw an opportunity.
Maps that were once so secret that an officer who lost one could be sent to prison (or worse) were bought by the ton and resold for a profit to governments, telecommunications companies, and others.

“I’m guessing we bought a million sheets,” Guy says.
“Maybe more.”

University libraries at places like Stanford, Oxford, and the University of Texas in Austin have drawers stuffed with Cold War Soviet maps, acquired from Guy and other dealers, but the maps have languished in obscurity.
Very few academics have seen them, let alone studied them.
Whatever stories they have to tell are hidden in plain sight.

But one unlikely scholar, a retired British software developer named John Davies, has been working to change that.
For the past 10 years he’s been investigating the Soviet maps, especially the ones of British and American cities.
He’s had some help, from a military map librarian, a retired surgeon, and a young geographer, all of whom discovered the maps independently.
They’ve been trying to piece together how they were made and how, exactly, they were intended to be used.
The maps are still a taboo topic in Russia today, so it’s impossible to know for sure, but what they’re finding suggests that the Soviet military maps were far more than an invasion plan.
Rather, they were a framework for organizing much of what the Soviets knew about the world, almost like a mashup of Google Maps and Wikipedia, built from paper.

A 1980 Soviet map of San Francisco, California. 
East View Geospatial

DAVIES HAS PROBABLY spent more time studying the Soviet maps than anyone else.
An energetic widower in his early 70s, he has hundreds of paper maps and thousands of digital copies at his house in northeast London, and he maintains a comprehensive website about them.

“I was one of those kids who at 4 is drawing maps of the house and garden,” he told me when we spoke for the first time, last year.
“Anywhere I go I just hoover up all the maps I can find.”

It was on a consulting trip to Latvia in the early 2000s that he stumbled on a trove of Soviet maps in a shop near the center of the capital city, Riga.
Davies struck up a friendship with one of the owners, a tall, athletic man named Aivars Beldavs, and bought an armload of Soviet maps from him every time he was in town.

Back home he’d compare the Soviet maps to the maps made around the same time by the Ordnance Survey, the national mapping agency, and other British government sources.
He soon spotted some intriguing discrepancies.

In Chatham, a river town in the far southeast, a Soviet map from 1984 showed the dockyards where the Royal Navy built submarines during the Cold War—a region occupied by blank space on contemporary British maps.
The Soviet map of Chatham also includes the dimensions, carrying capacity, clearance, and even the construction materials of bridges over the River Medway.
In Cambridge, Soviet maps from the ’80s include a scientific research center that didn’t appear on Ordnance Survey maps till years later.
Davies started compiling lists of these differences, and on his trips to Latvia, he started asking Beldavs more questions.

Beldavs, it turns out, had served in the Soviet Army in the mid-’80s, and he used the secret military maps in training exercises in East Germany.
A signature was required before a map could be checked out for an exercise, and the army made sure every last one got returned.
“Even if it gets destroyed, you need to bring back the pieces,” Beldavs says.

A few years after he got out of the army, Beldavs helped start the map shop, Jana Seta, which sold maps mainly to tourists and hikers.
As he tells it, officers at the military cartographic factories in Latvia were instructed to destroy or recycle all the maps as the Soviet Union dissolved in the early ’90s.
“But some clever officers found our company,” he says.
An offer was made, a deal was struck, and Beldavs estimates the shop acquired enough maps to fill 13 rail cars.
At first they didn’t have enough space to store them all.
One time, some local kids tried to set fire to a pallet load of maps they’d left outside.
But the vast majority of them survived unscathed.

Soviet maps stacked up in Aivars Beldavs’ map shop in Latvia.
Aivars Beldavs/Jana Seta map shop

“These maps were very interesting for the local people,” Beldavs says.
“We suddenly had very detailed maps like nothing we had before.”

Indeed, not all maps were created equal in the USSR. While the military maps were extremely accurate, the maps available to ordinary citizens were next to useless.
In a remarkable 2002 paper in a cartographic journal, the eminent Russian cartographer and historian of science, Alexey Postnikov, explains why this was so.
“Large-scale maps for ordinary consumers had to be compiled using the 1:2,500,000 map of the Soviet Union, with the relevant parts enlarged to the needed scale,” he wrote.
That’s like taking a road map of Texas and using a photocopier to enlarge the region around Dallas.
You can blow it up all you want, but the street-level details you need to find your way around the city will never be there.

Worse, the maps for the masses were deliberately distorted with a special projection that introduced random variations.
“The main goal was to crush the contents of maps so it would be impossible to recreate the real geography of a place from the map,” Postnikov tells me.
Well-known landmarks like rivers and towns were depicted, but the coordinates, directions, and distances were all off, making them useless for navigation or military planning, should they fall into enemy hands.
The cartographer who devised this devious scheme was awarded the State Prize by Stalin.

While the newly available Soviet military maps had practical value for people inside the former republics, for Davies they brought back a bit of Cold War chill.
Anyone old enough to have lived through those paranoid days of mutually assured destruction will find it a bit disturbing to see familiar hometown streets and landmarks labeled in Cyrillic script.
The maps are a rare glimpse into the military machine on the other side of the Iron Curtain.


Sri Lanka Topographic Map 1:200,000 Russian Soviet Military

The Soviet maps were just a casual hobby for Davies until he met David Watt, a map librarian for the British Ministry of Defence, in 2004.
Watt, it turns out, had encountered Beldavs years earlier and done some investigations of his own.
At a cartography conference in Cologne, Germany, in 1993, Watt had picked up a pamphlet from Beldavs’ shop advertising Soviet military topographic maps and city plans.
He was stunned.

“If they really were Soviet military city plans, then these were items which four years before were so highly classified that even squaddies in the Red Army were not allowed to see them,” he later recalled.
Watt placed an order.

A few weeks later a package was waiting for him at the airport. Inside were the maps he’d ordered—and a bunch more Beldavs had thrown in.
Over the next few years, Watt pored over these maps and picked up others from various dealers.
The scope of the Soviet military’s cartographic mission began to dawn on him.

They had mapped nearly the entire world at three scales.
The most detailed of these three sets of maps, at a scale of 1:200,000, consisted of regional maps.
A single sheet might cover the New York metropolitan area, for example.

But they didn’t stop there.
The Soviets made far more detailed maps of some parts of the world.
They mapped all of Europe, nearly all of Asia, as well as large parts of North America and northern Africa at 1:100,000 and 1:50,000 scales, which show even more features and fine-grained topography.
Another series of still more zoomed-in maps, at 1:25,000 scale, covers all of the former Soviet Union and Eastern Europe, as well as hundreds or perhaps thousands of foreign cities.
At this scale, city streets and individual buildings are visible.

And even that wasn’t the end of it.
The Soviets produced hundreds of remarkably detailed 1:10,000 maps of foreign cities, mostly in Europe, and they may have mapped the entire USSR at this scale, which Watt estimated would take 440,000 sheets.

All in all, Watt estimated that the Soviet military produced more than 1.1 million different maps.

A 1980 Soviet map of San Diego naval facilities (left) compared with a US Geological Survey map of the same area, from 1978 (revised from 1967). 
East View Geospatial/USGS

In 2004 he presented some of his research at a meeting of the Charles Close Society, a group devoted to the study of Ordnance Survey maps.
Davies was in the audience.
The two men spoke, and Watt encouraged Davies to study them more seriously.

Around the same time, Watt and Davies met two other men who’d also become intrigued by the Soviet maps: John Cruickshank, a retired surgeon from Leeds, and Alex Kent, a geography graduate student at Canterbury Christ Church University.
“It really all snowballed from there,” Watt says.
“The four of us got together as a kind of private study group.”

For Davies, the new friends and their shared interest came as a welcome distraction in an emotionally difficult time: His wife of nearly four decades was dying of cancer.
In 2006, Davies organized a research trip to Latvia.
The group spent several days in Riga, poring over Soviet military maps at Beldavs’ shop and visiting a cartographic factory that had made civilian maps during the Soviet era.
Not that the trip was all work—it coincided with the Latvian midsummer festival, an all-night affair involving folk songs and dancing, fueled by copious helpings of beer and wild boar sausage.
“It was an absolute hoot,” Watt recalls.

 Soviet map of Staten Island and, in the upper right, Lower Manhattan, from 1982.

The details include dimensions and building materials of the bridges.
East View Geospatial

IT’S EASY NOW, in an age when anybody can whip out a smartphone and call up a street map or high-res satellite image of any point on Earth with a few taps, to forget how hard it once was to come by geospatial knowledge.

In post-war Russia, men died in the pursuit of better maps.
After World War II, Stalin ordered a complete survey of the Soviet Union.
Though aerial photography had reduced the need for fieldwork by then, it didn’t eliminate it entirely, according to the 2002 paper by Alexey Postnikov, the Russian cartographer.
Survey teams endured brutal conditions as they traversed Siberian wilderness and rugged mountains to establish networks of control points.

A surveyor himself, Postnikov writes that on a survey expedition to remote southern Yakutiya in the 1960s he found a grim note scrawled on a tree trunk by one of his predecessors.
It’s dated November 20, 1948. “All my reindeer have perished,” it begins.
“The food stores became bears’ prey. I am left with a very sick junior surveyor on my hands. I have no transportation or means of subsistence.”
The stranded surveyor says he will attempt to force his way to the River Gynym, a sparsely populated area at least 200 kilometers away.
Given that temperatures in Yakutiya rarely rise above –4 degrees Fahrenheit in the winter, Postnikov doubts they made it.

It was after the death of Stalin in 1953 that the Soviet military, which had to that point focused its cartographic efforts on Soviet territory and nearby regions like the Balkans and Eastern Europe, started to take on global ambitions.

Stalin’s successor, Nikita Khrushchev, saw fertile ground for the spread of communism in a world in which former European colonies were quickly gaining their independence, says Nick Baron, a historian at the University of Nottingham.
“Khrushchev was exhilarated by the prospect of winning over these newly liberated countries in Africa, South Asia, and so on,” Baron says.
“It was around that time that the military first began to undertake foreign mapping, including sending their own cartographers abroad to conduct their own surveys in many of these developing countries.”

A detail of a 1975 map showing the Pentagon.

Postnikov estimates that the military mapping program involved tens of thousands of surveyors and topographers, the people who go out into the field and gather data on relief and other features, and hundreds of cartographers who compiled these data to make the maps.
During the Cold War he served in a parallel civilian cartographic corps that made maps for engineers and planners.
These maps were far better than the bogus ones produced for the proletariat, accurate enough to be used for building roads and other infrastructure, but stripped of any strategic details that could aid the enemy if they were captured.
The civilian cartographers were well aware that the military was busily mapping foreign territories, Postnikov says.
“We knew each other personally, and we knew about their main task.”

How many maps did the military cartographers make?
“Millions and millions,” is what Postnikov says when I ask, but he quickly adds: “It’s absolutely impossible to say, for me, at least.”
The US military made maps during the Cold War too, of course, but the two superpowers had different mapping strategies that reflected their different military strengths, says Geoff Forbes, who served in the US Army as a Russian voice interceptor during the Cold War and is now director of mapping at Land Info, a Colorado company that stocks Soviet military maps.
“The US military’s air superiority made mapping at medium scales adequate for most areas of the globe,” Forbes says.
As a result, he says, the US military rarely made maps more detailed than 1:250,000, and generally only did so for areas of special strategic interest. 
“The Soviets, on the other hand, were the global leaders in tank technology,” Forbes says.
After suffering horrific losses during the Nazi ground invasion in WWII, the Soviets had built up the world’s most powerful army.
Maneuvering that army required large-scale maps, and lots of them, to cover smaller areas in more detail.
“One to 50,000 scale is globally considered among the military to be the tactical scale for ground forces,” Forbes says.
“These maps were created so that if and when the Soviet military was on the ground in any given place, they would have the info they needed to get from point A to point B.”

 Cannes-Antibes (France)

A manual produced by the Russian Army, translated and published in 2005 by East View, a Minnesota company with a large inventory of Soviet maps, gives some insight into how the topographic maps could be used in planning or executing combat operations.
It includes tables on the range of audibility of various sounds (a snapping twig can be heard up to 80 meters away; troop movements on foot, up to 300 meters on a dirt road or 600 meters on a highway; an idling tank, up to 1,000 meters; a rifle shot, up to 4,000 meters).

Other tables give the distances for visual objects (a lit cigarette can be visible up to 8,000 meters away at night, but you’d have to get within 100 meters to make out details of a soldier’s weaponry in daylight).
Still more tables estimate the speed at which troops can move depending on the slope of the terrain, the width and condition of the roadway, and whether they are on foot, in trucks, or in tanks.

The maps themselves include copious text with detailed descriptions of the area they depict, everything from the materials and conditions of the roads to the diameter and spacing of the trees in a forest to the typical weather at different times of year.
The map for Altan Emel, a remote region of China near the border of Mongolia and Russia, includes these details, according to a translation on Omnimap’s website:
The lakes are usually not large; 0.5-2 km2 (maximum up to 7 km2), with the depth up to 1 meter. The banks are low, gentle, and partially swamped. The bottom is slimy and vicious [sic]. Some of lakes have salted or alkaline water.

It goes on (and on) from there.

The description of San Diego, translated and published in English here for the first time, points out objects of obvious strategic interest—including a submarine base, a naval airbase, ammunition depots, factories that make aircraft and weapons—but also includes notes on public transportation, communications systems, and the height and architecture of buildings in various parts of town.

To make these maps of foreign territory, the Soviets started with official, publicly available maps from sources like the Ordnance Survey or the US Geological Survey.
John Davies has found, for example, that elevation markers on maps of Britain often appear at exactly the same points and work out to be exact metric equivalents of the British units.
(Because of such similarities, the Ordnance Survey has long maintained that the Soviet maps violate their copyright.)

The Soviets appear to have done the same thing with maps made by the US Geological Survey, but those maps are in the public domain, and anyone—including someone from the Soviet embassy—could have bought them easily.
“When I joined the USGS in 1976, I heard the then commonly-told story about a representative from the Soviet embassy in Washington obtaining the initial copy of the paper-print National Atlas, prepared by the USGS in cooperation with a number of other agencies, when it was offered for public sale in 1970,” USGS geologist and historian Clifford Nelson told me in an email.
Nelson added that it seems logical that Soviet representatives would have acquired 1:24,000-scale topographic maps from the US as they were printed, but he says he knows of no paper trail that could confirm that.

Despite the Ordnance Survey’s copyright claim, Davies argues that the Soviet maps aren’t mere copies.
In many places, they show new construction—roads, bridges, housing developments, and other features that don’t appear on contemporary Ordnance Survey maps.
Many of these details, Davies argues, came from aerial or satellite reconnaissance (the first Soviet spy satellite, Zenit, was launched into orbit in 1962).
Other details, such as notes on the construction materials and conditions of roadways and bridges, seemingly had to come from agents on the ground (or, according to one account from a Swedish counterintelligence officer, by picnicking Soviet diplomats with a preference for sites near objects of strategic interest).

Unlike the 1984 US Geological Survey map of Chicago’s lakefront, the 1982 Soviet map shows individual buildings in the city and structures on Navy Pier.
East View Geospatial/USGS

 Not that the Soviet maps are infallible.
There are curious mistakes here and there: Earthworks for a new pipeline in Teesside in the UK are mistaken for a road under construction, a nonexistent subway line connects the Angel and Barbican stations in London.
The town of Alexandria appears (correctly) in northern Virginia, but a town of the same name also appears (incorrectly) outside of Baltimore.
Defunct railways and ferry routes persist on editions of the Soviet maps for years after they’ve been discontinued.

There are other puzzles too.
The Soviets mapped a handful of American cities at a scale of 1:10,000. These are detailed street-level maps, but they don’t focus on places of obvious strategic importance.
The list of known maps at this scale includes:

Pontiac, MI
Galveston, TX
Bristol, PA
Scranton, PA
Syracuse, NY
Towanda, and North Towanda, NY
Watertown, NY
Niagara Falls, NY

Economic rather than military objectives may have motivated the Soviets to map these cities in detail, suggests Steven Seegel, an expert on Russian political and intellectual history at the University of Northern Colorado.
The Soviets admired US postwar economic prosperity and wanted to understand how it worked, Seegel says.

“These cities might have been on their radar for their reputation for heavy industry, shipping, or logistics,” Seegel says.
Pontiac had a General Motors plant, for instance, and Galveston was a major port. Scranton had a huge coal mine.
Other towns were close to hydropower plants.
“There was an obsession in the Soviet era over power grids and infrastructure” that went beyond their military implications, Seegel says.

John Davies has found scores of features on the Soviet maps that don’t seem to have immediate military relevance, things like factories, police stations, and transportation hubs.
“If it’s an invasion map, you wouldn’t show the bus stations,” Davies says.
“It’s a map for when you’re in charge.”

That’s probably true, but there may be even more to it than that, says Alex Kent, who’s now a senior lecturer in geography at Canterbury Christ Church University.
Kent thinks the Soviets used the maps more broadly. “It’s almost like a repository of intelligence, a database where you can put everything you know about a place in the days before computers,” he says.
“They managed to turn so much information into something that’s so clear and well-presented,” Kent says.
“There are layers of visual hierarchy. What is important stands out. What isn’t recedes. There’s a lot that modern cartographers could learn from the way these maps were made.”

A close-up of part of the Soviet map of New York City from 1982, with Lower Manhattan in the upper right corner. The details include dimensions and building materials of the bridges

Aesthetically, the maps are striking, if not beautiful.
The cartographers who made them took tremendous pride in their work, down to the last details, says Kent Lee, the CEO of EastView Geospatial, a Minnesota company that was once Russell Guy’s main competition in the Soviet map import business and now claims to have the largest collection of Soviet military maps outside of Russia.
“Cartographic culture is to Russia as wine culture is to France,” Lee says.

RUSSELL GUY DOESN’T sell many Soviet maps these days.
But for a while there in the ’90s, he says, business was booming.
Telecommunications companies bought them up as they were building cell phone networks across Africa or Asia.
If you’re building cell phone towers, Guy explains, you need to know the terrain, and the Soviet topographic maps were often the best source available in less developed parts of the world.
He says he could tell which countries were soliciting bids at any given time because as soon as one company ordered a set of Soviet topo maps, three or four others would call up to order the same thing.
 Alexandria

The US government was another big buyer.
Intelligence analysts used the Soviet maps in Afghanistan in the early 2000s, says Ray Milefsky, a former geographer and geospatial analyst at the US military’s Defense Mapping Agency (now called the National Geospatial-Intelligence Agency).
Milefsky later moved to the State Department, where he specialized in determining where international boundaries should be drawn on official government maps.
The Soviet maps were—and continue to be—one of the best sources, says Milefsky, who retired in 2013.
The boundary lines on the Soviet maps are so accurate because the cartographers went back to the original treaties and reconciled the landmarks mentioned there with survey reports and boundary markers on the ground.
“When we first got them it was a gold mine, especially for aligning the boundaries of the former Soviet republics,” Milefsky says.

But with the proliferation of satellite mapping in recent years, the Soviet maps aren’t selling like they used to, Guy and other dealers say.
Once in a while a telecom or avionics company will order a set.
Sometimes an adventure travel company will buy a few.
Geologists and other academics sometimes use them.
A team of archaeologists recently used the Soviet maps to study the destruction of prehistoric earthen mounds by encroaching agriculture in Central Asia.

Even so, military maps are still a touchy topic in Russia.
As recently as 2012, a former military topographic officer was sentenced to 12 years in prison for allegedly leaking classified maps to the West.

John Davies and Alex Kent gave a presentation of their research at an international cartography meeting in Moscow in 2011, hoping to meet Russian cartographers or scholars who knew about the maps or perhaps had even worked on them.
They thought maybe someone might come up after their talk or approach them at happy hour.
No one did.

North of Crete (1:50,000)

“The silence was quite disconcerting,” Kent says.
“This was a subject you just don’t talk about.”
Davies and Kent have written a book about the Soviet military maps, but their publisher, the Bodleian Library at the University of Oxford, recently backed out, citing copyright concerns, Davies says.

For Guy, the maps are a reminder of a time when a map dealer from a small company in North Carolina got a tiny taste of the 007 lifestyle.
He and other dealers who brought the maps to the West still have vivid memories of clandestine meetings in dark Moscow bars, being trailed by KGB agents (who else could it be?), and worrying about who was listening in on their phone calls.
They still dodge questions about their old military connections.
They don’t want to stir up trouble.
Even now, the paranoia is hard to shake.

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