Sunday, August 14, 2011

Image of the week : Cakaulevu Reef, Fiji

>>> localization with the Marine GeoGarage <<<

From NASA

Surrounded by the warm waters of the South Pacific, the Fiji Islands are often cloaked in clouds when the Aqua or Terra satellites fly over.
But July 21, 2011, offered up a perfectly cloud-free view.
This image from the Moderate Resolution Imaging Spectroradiometer (MODIS) on Aqua shows Fiji’s second-largest island, Vanua Levu, and the Cakaulevu Reef that shelters the island’s northern shore.
Also called the Great Sea Reef, Cakaulevu shines turquoise through clear, shallow waters.
It is the third longest continuous barrier reef in the world, behind the Great Barrier Reef in Australia and the Mesoamerica Reef off Central America.
When combined with the nearby Pascoe Reef, Cakaulevu Reef is about 200 kilometers (120 miles) long.
On its own, the Cakaulevu Reef covers 202,700 square kilometers (77,200 square miles).
The first systematic survey of the reef (in 2004) revealed a diverse marine population, including unique mangrove ecosystems and endemic fish.
Twelve threatened species live within the reef: 10 fish species, the green turtle, and the spinner dolphin.
All of this marine life has traditionally supported the native population, and currently some 70,000 people depend on the reef.
After seeing fish populations decline in recent decades, local leaders created a series of marine protected areas in 2005 where fishing is prohibited.
Traditional customs used to manage the reef for hundreds of years permit leaders to set aside portions of the qoliqoli, or traditional fishing ground.
Where the ban has been enforced, fish populations are rebounding and spilling over into areas where fishing is permitted.
From space, none of this bounty is visible.
Instead, the beauty comes from the vivid shades of blue and green coral creates when viewed through water.

Saturday, August 13, 2011

Kiteboarding a natural wonder - Gisela Pulido splits the Rocks



Gisela Pulido kiteboards one of the world's natural wonders, the 12 apostles.
Located in the Port Campbell National Park, the Twelve Apostles are a group of eight limestone stacks that jut out of the water up to 150 feet.
The area is known for having steady winds and rough seas which provide quite the challenge for Gisela as she boards between the stacks and the cliffs that line the beach.

>>> geolocalization with the Marine GeoGarage <<<

Friday, August 12, 2011

Brazil DHN update in the Marine GeoGarage

1804 San Francisco do Sul

5 charts have been updated (DHN update July, 21)

  • 1607 BAÍAS DA ILHA GRANDE E DE SEPETIBA
  • 1622 BAÍA DE SEPETIBA
  • 1804 PORTO DE SÃO FRANCISCO DO SUL
  • 1822 PORTOS DE PARANAGUÁ E ANTONINA
  • 22800 DE CONCEIÇÃO DA BARRA A VITÓRIA
Today 238 charts (283 including sub-charts) from DHN are displayed in the Marine GeoGarage

Canada CHS update in the Marine GeoGarage

4307 Canso Harbour

66 charts have been updated (July 22) :

  • 1202 CAP ETERNITE TO SAINT-FULGENCE
  • 1220 BAIE DES SEPT ILES
  • 1312 LAC SAINT-PIERRE
  • 1313 BATISCAN TO LAC SAINT-PIERRE
  • 1515A PAPINEAUVILLE TO OTTAWA
  • 1515B BECKETTS CREEK
  • 2085 TORONTO HARBOUR
  • 3412 VICTORIA HARBOUR
  • 3419 ESQUIMALT HARBOUR
  • 3441 HARO STRAIT BOUNDARY PASS AND SATELLITE CHANNEL
  • 3461 JUAN DE FUCA STRAIT EASTERN PORTION
  • 3463 STRAIT OF GEORGIA SOUTHERN PORTION
  • 3481 APPROACHES TO VANCOUVER HARBOUR
  • 3489A PATTULLO BRIDGE TO BARNSTON ISLAND
  • 3489B PATTULLO BRIDGE TO CRESCENT ISLAND
  • 3490 (B-C) FRASER RIVER/FLEUVE FRASER (SAND HEADS TO DOUGLAS ISLAND)
  • 3492 ROBERTS BANK
  • 3493 VANCOUVER HARBOUR WESTERN PORTION
  • 3513 STRAIT OF GEORGIA NORTHERN PORTION
  • 3526 HOWE SOUND
  • 3527 BAYNES SOUND
  • 3535 PLANS MALASPINA STRAIT - PENDER HARBOUR
  • 3606 JUAN DE FUCA STRAIT
  • 3802 DIXON ENTRANCE
  • 3808 JUAN PEREZ SOUND
  • 3892 MASSET HARBOUR AND NADEN HARBOUR
  • 3895 MASSET HARBOUR AND APPROACHES
  • 4003 CAPE BRETON TO CAPE COD
  • 4013 HALIFAX TO SYDNEY
  • 4015 SYDNEY TO SAINT-PIERRE
  • 4023 NORTHUMBERLAND STRAIT / DETROIT DE NORTHUMBERLAND
  • 4201 HALIFAX HARBOUR (BEDFORD BASIN)
  • 4202 HALIFAX HARBOUR POINT PLEASANT TO BEDFORD BASIN
  • 4203 HALIFAX HARBOUR BLACK POINT TO POINT PLEASANT
  • 4210 CAPE SABLE TO PUBNICO HARBOUR
  • 4236 TAYLORS HEAD TO SHUT-IN ISLAND
  • 4237 APPROACHES TO HALIFAX HARBOUR
  • 4241 LOCKEPORT TO CAPE SABLE
  • 4242 CAPE SABLE ISLAND TO TUSKET ISLANDS
  • 4266 SYDNEY HARBOUR
  • 4306 STRAIT OF CANSO AND SOUTHERN APPROACHES
  • 4307 CANSO HARBOUR TO STRAIT OF CANSO
  • 4308 ST. PETERS BAY TO STRAIT OF CANSO
  • 4335 STRAIT OF CANSO AND APPROACHES
  • 4363 CAPE SMOKEY TO ST PAUL ISLAND
  • 4365 INGONISH HARBOUR AND APPROACHES
  • 4367 FLINT ISLAND TO CAPE SMOKEY
  • 4385 CHEBUCTO HEAD TO BETTY ISLAND
  • 4403 EAST POINT TO CAPE BEAR
  • 4404 CAPE GEORGE TO PICTOU
  • 4405 PICTOU ISLAND TO TRYON SHOALS
  • 4420 MURRAY HARBOUR
  • 4460 CHARLOTTETOWN HARBOUR
  • 4466 HILLSBOROUGH BAY
  • 4469 ILE PLATE TO ILE DU PETIT MECATINA
  • 4474 ILES BUN TO BAIE DES MOUTONS
  • 4529 FOGO HARBOUR SEAL COVE AND APPROACHES
  • 4821 WHITE BAY AND NOTRE DAME BAY
  • 4839 HEAD OF PLACENTIA BAY
  • 4855 BONAVISTA BAY SOUTHERN PORTION
  • 4886 TWILLINGATE HARBOUR
  • 4905 CAPE TORMENTINE TO WEST POINT
  • 4909 BUCTOUCHE HARBOUR
  • 4913 CARAQUET HARBOUR BAIE DE SHIPPEGAN AND MISCOU HARBOUR
  • 4920 PLANS CHALEUR BAY SOUTH SHORE
  • 5045 DOG ISLANDS TO CAPE MAKKOVIK
  • 6248 OBSERVATION POINT TO GRINDSTONE POINT
  • 6286A WHITEDOG DAM TO MINAKI - 1
  • 6286B WHITEDOG DAM TO MINAKI - 2

So 774 charts (1643 including sub-charts) are available in the Canada CHS layer. (see coverage)

Note : don't forget to visit 'Notices to Mariners' published monthly and available from the Canadian Coast Guard both online or through a free hardcopy subscription service.
This essential publication provides the latest information on changes to the aids to navigation system, as well as updates from CHS regarding CHS charts and publications.
See also written Notices to Shipping and Navarea warnings : NOTSHIP

Troubled waters: why China's navy makes Asia nervous

China's first aircraft carrier started sea trials Wednesday,
amid worry of neighbor Taiwan and general concerns about the Asian giant's military ambitions. (Aug. 10)

From Time

The last time the aircraft carrier once known as the Varyag generated this much concern, it was for fear it might sink.
The ship was one of the Soviet Union's last naval commissions, but construction at the Black Sea shipyard of Mykolaiv was abandoned in 1992 after the U.S.S.R.'s breakup.
The Varyag languished as an unfinished hulk until 1998, when a Chinese company, based in Macau and with ties to the Chinese navy, bought it from Ukraine, ostensibly to take the ship to the gambling enclave as a floating casino.
Turkish officials worried that the 300-m vessel — a rusting shell without weaponry, engines or navigation equipment — would sink while crossing the Bosphorus Strait, causing an environmental headache and a hazard to navigation.
So they delayed its passage for three years, only agreeing in 2001 to halt traffic on the Bosphorus to allow the symbol of Soviet decline to be tugged past the shoreside forts and luxury homes of Istanbul on its five-month journey to the Pacific.

Macau's harbor was never deep enough for the Varyag.
The orphaned warship of a former superpower, with its distinct ski-jump-like bow for launching planes, wound up instead in the northeastern Chinese port city of Dalian.
There, it has slowly been transformed into the first aircraft carrier of a future superpower. Now the world has a new set of concerns about the former Varyag.
On Aug. 10 the newly refurbished carrier set sail from Dalian for its first sea trial.
Its casino cover story long discarded, the ship will enter a wager with decidedly higher stakes: the projection of China's military power on the high seas.
(See China's largest military parade in its history.)

The Varyag's launch comes at a fraught time. China's armed forces are modernizing — military spending has grown by an annual average of 15% since 2000 — and after a decadelong charm offensive in East and Southeast Asia, Beijing has begun taking a more aggressive stand on territorial disputes.
Several factors are driving this tougher approach, including the possibility that disputed waters may have valuable energy reserves, a desire to challenge the regional influence of the U.S., the ever present influence of nationalism and a fear of looking weak before next year's leadership transition.
"The Chinese attitude appears to have become substantially more assertive in character," says Clive Schofield, director of research at the University of Wollongong's Australian National Centre for Ocean Resources and Security.
"You see this across the board."


Senkaku islands

China's neighbors, particularly Japan, Vietnam and the Philippines, have responded with tough talk and posturing of their own.
Last year China and Japan sparred over islands in the East China Sea that Japan administers and both nations claim, known as the Diaoyu to the Chinese and the Senkaku to the Japanese.
When Japan detained a Chinese trawler captain near the islands, China cried foul.
Two weeks later Japan released the fisherman, who returned to a hero's welcome in China.
This summer, Chinese warships passed through international waters near Okinawa, which has unsettled Tokyo.
Japan's latest white paper on national defense said Chinese military modernization, increased activities in Asian waters and lack of transparency "are becoming a cause for concern in the region and within the international community."

The more contentious cockpit is the South China Sea.
Its 3 million sq km are dotted by tiny islands, and many of its waters are thought to hold rich oil and natural-gas deposits.
Tensions have been rising between China, which claims almost all of the South China Sea, and some of the other Asian states that assert sovereignty over parts of it.
The Philippines, which says that Chinese ships have harassed its survey ships and fishing boats a half-dozen times since the spring, announced it would begin to refer to the area as the West Philippine Sea and sent its navy's flagship, the World War II — era frigate Rajah Humabon, to patrol it.
Vietnam accuses Chinese vessels of deliberately cutting, twice this summer, the cables of survey ships belonging to PetroVietnam.
Hanoi says it is considering a possible reinstatement of the military draft and carried out live-fire drills in June.
China responded with three days of naval exercises of its own.
(See "China-Japan Tensions Grow After Shipping Collision.")

Surface Tension
The disputes over Asia's waters have drawn in the U.S. Last year, Secretary of State Hillary Clinton declared that the U.S. had a "national interest" in freedom of navigation in the South China Sea and offered Washington's assistance as a mediator.
China responded angrily that the U.S. was seeking to "internationalize" an issue that should be resolved among neighbors.
Some observers figured that Beijing would take a less antagonistic approach in 2011, having seen how regional disputes invited greater U.S. involvement.
"That hasn't happened," Ian Storey, a fellow at the Institute of Southeast Asian Studies in Singapore said in June.
"In fact, tensions have risen in the past two or three months, probably to a higher level than they've been at since the end of the Cold War."

On July 20, China and ASEAN announced nonbinding guidelines on how a settlement in the South China Sea might be pursued, but the differences have hardly narrowed.
Cui Tiankai, a Chinese Vice Foreign Minister, warned that the U.S. was at risk of becoming entangled in a regional conflict if it did not work to restrain other states in the region.
"I believe that individual countries are actually playing with fire," he told reporters in late June.
"I hope that fire will not be drawn to the United States." In mid-July, General Chen Bingde, the Chief of the General Staff of the People's Liberation Army (PLA), publicly complained to his U.S. counterpart, Admiral Mike Mullen, about U.S. military spending, maritime surveillance operations near China's borders and joint exercises with Vietnam and the Philippines that he called "ill timed."
Mullen, the Chairman of the Joint Chiefs of Staff, said after a four-day visit to China that he was not convinced that Beijing's military advancements were entirely defensive in nature, and he fretted that the strife over the South China Sea "could result in some kind of escalation, some kind of miscalculation — an incident, a misunderstanding that would greatly heighten the stakes."
(See "Asia's New Cold War.")

Links :

  • TheGuardian : China admits 'secret' aircraft carrier is nearly ready for launch
  • NPR : China's growing military muscle: a looming threat?
  • WSJ : The carrier of Asia-Pacific troubles