Monday, December 29, 2014

US NOAA update in the Marine GeoGarage

As our public viewer is not yet available
(currently under construction, upgrading to a new viewer
as Google Maps API v2 is officially no more supported),
this info is primarily intended to our universal mobile application users
(Marine US iPhone-iPad on the Apple Store &
Weather 4D Android -App-in- on the PlayStore)
and also to our B2B customers which use our nautical charts layers
in their own webmapping applications through our GeoGarage API

 NOAA raster chart coverage

12 charts have been updated in the Marine GeoGarage
(NOAA update December 2014, released December 22th 2014)

  • 11401 ed32 Apalachicola Bay to Cape San Blas
  • 11406 ed14 St.Marks River and approaches
  • 11408 ed30 Crystal River to Horseshoe Point;Suwannee River;Cedar Keys
  • 12325 ed5 Navesink And Shrewsbury Rivers
  • 12331 ed33 Raritan Bay and Southern Part of Arthur Kill
  • 12374 ed15 North Shore of Long Island Sound Duck Island to Madison Reef
  • 13274 ed29 Portsmouth Harbor to Boston Harbor; Merrimack River Extension
  • 16305 ed11 Bristol Bay-Cape Newenham and Hagemeister Strait
  • 17407 ed16 Northern part of Tlevak Strait and Uloa Channel
  • 17408 ed9 Central Dall Island and vicinity
  • 17409 ed11 Southern Dall Island and vicinity
  • 17431 ed12 N. end of Cordova Bay and Hetta Inlet
Today 1026 NOAA raster charts (2168 including sub-charts) are included in the Marine GeoGarage viewer (see PDFs files)


How do you know if you need a new nautical chart?
See the changes in new chart editions.
NOAA chart dates of recent Print on Demand editions

Note : NOAA updates their nautical charts with corrections published in:
  • U.S. Coast Guard Local Notices to Mariners (LNMs),
  • National Geospatial-Intelligence Agency Notices to Mariners (NMs), and
  • Canadian Coast Guard Notices to Mariners (CNMs)
While information provided by this Web site is intended to provide updated nautical charts, it must not be used as a substitute for the United States Coast Guard, National Geospatial-Intelligence Agency, or Canadian Coast Guard Notice to Mariner publications

Please visit the
NOAA's chart update service for more info or the online chart catalog

Tsunami-hit nations mark anniversary

 Significant advances have been made in tsunami detection and forecasting
since the Great Indian Ocean (Sumatra) Tsunami of 2004. 

From BBC

A decade ago, one of the largest earthquakes ever recorded struck off the coast of Indonesia, triggering a tsunami that swept away entire communities around the Indian Ocean.
About 228,000 people were killed as a result of the 9.1 magnitude quake and the giant waves that slammed into coastlines on 26 December 2004.
The violent upward thrust of the ocean floor at 07:58 local time (00:58 GMT) displaced billions of tonnes of seawater, which then raced towards shorelines at terrifying speeds.
The waves stripped vegetation from mountain sides hundreds of metres inland, capsized freighters and threw boats into trees. The estimated cost of the damage was just under $10bn (£6.4bn).
Ten years on, many coastal towns and villages have rebuilt their communities and lives. The shores of Indonesia and Thailand, left ravaged by the tsunami, appear transformed.


How the wave spread: 26 December 2004
After the quake struck, the resulting tsunami radiated across the Indian Ocean, from Indonesia to Sri Lanka and beyond.
Sequence of graphics showing the spread of the 2004 Asian tsunami
Sequence of graphics showing the spread of the 2004 Asian tsunami

The quake ruptured the greatest fault length of any recorded, spanning a distance of an estimated 1,500km (900 miles) - longer than the US state of California.
The rupture started beneath the quake's epicentre and progressed northward along the fault at about 2km/sec (1.2 miles/second) - lasting about 10 minutes - according to the Tectonics Observatory at the California Institute of Technology.
The length of the rupture meant that the waves reached a wider geographical area - as far afield as Mexico, Chile, and the Arctic.
The waves travelled at speeds of up to 800km/h (500mph).

Map showing the arrival time of the 2004 Indian Ocean tsunami waves

Computer modelling after the tsunami, estimated that waves had reached a height of almost 20m (65ft) in some areas.

Map showing the wave height of the 2004 Indian Ocean tsunami

However, scientists investigating damage in Aceh, Indonesia found subsequent evidence that waves had reached 20-30m (65-100ft) in places.
Despite there being several hours between the earthquake and the impact of the tsunami, nearly all the victims were taken completely by surprise. With no adequate warning systems in place, there was no alert issued to people to seek safety.
In the aftermath of the disaster, the Indian Ocean Tsunami Warning and Mitigation System was formed to detect seismological changes and provide warnings of approaching waves.
However, on the 10th anniversary of the disaster, risk experts and UN officials have warned weaknesses remain in the system, particularly regarding the communication of warnings at local level.

Links :
  • National Geographic : Will Indonesia be ready for the next tsunami? 
  • LiveScience : Tsunami science: Advances since the 2004 Indian ocean tragedy
  • WSJ : Tsunami’s legacy: Quest for early warning

Sunday, December 28, 2014

Surf sailing

Visit Finland, an entry in the Clipper Race, surfs down at wave at 27 knots.
Heading toward the Race 9 finish line in the Clipper Round the World Yacht Race in 2012, the Golden Gate Bridge, the Finnish team experience a huge surf after crossing the Pacific Ocean spending 30 days at sea in the race from Qingdao, China to Oakland, San Francisco Bay.

Saturday, December 27, 2014

BAR Nacra 20 training


You will want to watch it, and you'll want to watch it right to the end, because someone is taking 'It's Time to Fly' WAY too seriously.
The question is... who?
Take a look at the BAR team in training on the foiling Nacra F20.

Friday, December 26, 2014

Rolex Sydney Hobart Yacht Race : who knows what danger lurks at sea?


 CYCA celebrating the 70th edition in 2014

From NYTimes by Christopher Clarey

It is not just the wind and the waves that can play nasty tricks on an ocean-racing yacht.
There is also what lies beneath.
The latest reminder of this fact came earlier this month when the Volvo Ocean Race entry Team Vestas Wind struck something in a remote stretch of the Indian Ocean northeast of Mauritius.
“I assumed at that point we had hit a container or a whale, and in about 10 seconds or so there was all this crashing and grinding,” said Brian Carlin, the crew’s on-board reporter.
In fact, while moving at about 20 knots the boat had run aground on a reef, allegedly as a result of a navigational error.
The incident left a stranded, significantly damaged $6 million yacht and a crew of nine badly shaken but ultimately very fortunate sailors who had to abandon ship and await rescue.

The crew of Team Vestas Wind with their boat after it ran into a coral reef near Mauritius in early December.
From whales and giant sunfish to oil drums and plastic debris, numerous possible hazards to the big ocean racers’ chances and safety abound beneath the surface of the sea. 
Brian Carlin/Team Vestas Wind/Volvo Ocean Race, via Getty Images

The Rolex Sydney Hobart Yacht Race, which begins in Sydney Harbor as usual on Dec. 26, will not travel through any part of the planet that is nearly so isolated as that.
The race is in its 70th year, and the knowledge and the charts of its route are extensive.
But there are hazards below the surface all the same.
In 2012, a Reichel Pugh 51 named Secret Men’s Business hit what was believed to be a whale.
The boat went from 20 knots to a dead stop in an instant and it was flung on its side, with the mast nearly touching the water.
The bottom section of the rudder was sheared off, although the crew did find a way to finish the race.

 Sydney-Hobart overview nautical chart with the Marine GeoGarage

Many other types of vessels are also involved in whale or shark collisions, according the International Whaling Commission.
In fact, according to the commission’s data, the highest number of collisions come from whale-watching vessels.
Overall, the commission reported, a quarter of all recorded collisions lead to the death of the whale, and many result in injuries.
In the Hobart race, Slow-moving ocean sunfish, with an average adult weight of about 1,000 kilograms, or 2,200 pounds, are another problem.
Although they spend much of their lives at considerable depth, the sunfish sometimes bask near the surface, where they can be hard to spot from a fast-moving ocean racer.

Mark Richards, the skipper of the supermaxi Wild Oats XI, said the boat had three separate collisions with sunfish in 2005, one of the years in which it took Hobart line honors.
Other sailors have been forced to retire their yachts from the race after such collisions.
“The sunfish are a large threat because they don’t move, and they are so huge that they always pose a risk,” said Sean Langman, a veteran Australian skipper.
“With the climactic changes, we don’t seem to be seeing as many as we used to, but they are still a threat.”
Langman added that a collision with a shark during the 1999 race sheered off a rudder.
Unlike with sunfish, he said that climate change appeared to have increased the threat posed by whales.
“Even though we’re approaching our summer and most of the sea life has migrated south, there were so many whales around Australia when I brought the boat from Tasmania last month,” he said.
“So now other than the sunfish and the sharks, you also have the added risk of whales.”

Will Oxley, an Australian marine biologist and navigator, has been a regular participant in the Hobart and is now the navigator for the Volvo Ocean Race team Alvimedica. 
Before the race began in October in Spain, he sounded a cautionary note that proved prescient about coral reefs that are “quite poorly charted.”
“I can’t really speak to what actually happened on board Vestas, but for us, obviously this is a part of the ocean where there’s only been one previous race, and so there is no history to refer to,” he said in a telephone interview from Abu Dhabi last week.
“So in that respect, while of course it is charted, it’s uncharted territory for a yacht race. We were making sure we were going to avoid the shoals successfully when we got the call that Vestas had actually hit it. It’s a terrible thing. They were very lucky to get away without loss of life.”
But Oxley, who has taken part in the last three Volvo Races and whose first circumnavigation was in 2001, emphasized that the hazards now often are found much closer to and are a result of civilization.
“Historically, the Volvo Ocean Race spent the majority of time racing in very isolated places, with albatrosses and icebergs,” he said.
“Now many of the areas we’re going into, we are dealing with a lot more fishing nets and flotsam from the human population. On the last leg, 44-gallon drums were floating in the ocean — the standard gas drum that you find anywhere in the world, but when you get out there, an industrial-sized drum, half full of oil, can do massive damage to your boat.”


Near the coast of Oman, meanwhile, drift nets were a main concern.
“If you happen to be unlucky enough to encounter the middle of a net without warning, then avoiding it may be impossible and apart from the damage they can cause, you can easily get tangled up and have to send a person into the water to clear yourself,” Oxley said.
“We ran into two on this last leg and luckily for us the diameter of the rope on the headline was small enough that the velocity and momentum of the boat broke it. However, understandably, the fisherman in his small boat is not happy about his net.”
“We do our very best to avoid them,” he added, “but at this scale of fishing, the boats — and I use that term lightly — are very small and do not show up on radar. They also do not tend to display navigation lights. The first indication of them is a little hurricane lamp or torch that comes on and starts flashing wildly, and we have no indication from that light which direction we need to head to avoid the invisible net.”

Follow seven international teams as they race 38,739 nautical miles around the world in the 12th edition of the Volvo Ocean Race.
Along with being the foremost offshore sailing competition, the race reminds us about the vastness of our Oceans and what it means to be a modern day explorer.

One of the tools Oxley and Alvimedica have deployed is a night-vision scope that allows them to look ahead and avoid obstacles.
But there is clearly an element of luck involved.
In 2003, the French sailor Olivier de Kersauson and his crew, who were participating in the round-the-world Jules Verne Trophy, said that a giant squid had affixed itself to their yacht, bringing it to a halt in the open ocean before the creature then released it.

Perpetual Loyal, Wild Oats XI and Comanche - SOLAS Big Boat Challenge 2014

“Honestly, whether we’re sailing big multihulls or these supermaxis going incredibly fast speeds, you just go sort of on faith that the odds are in your favor, and sleep with your feet facing forward,” said Peter Isler, an American who is the navigator for the supermaxi Rio 100 in this Hobart.
“Whether you are racing to Hawaii or across the Irish Sea or down in the Bass Strait, you are just going for it,” he added.
“It’s not like in the Southern Ocean, where you are watching for icebergs on radar. There are some things you can’t avoid in the ocean, and you just pray that you do. It may not be the greatest thing to talk about for our sport, but the sad truth is boats do run into stuff. In the last five years, we’ve hit a couple of whales and a shark. It’s sad. These boats go so fast and don’t make any noise. But the things you worry about the most are big, hard things.”
That means things like partially submerged containers that have fallen off ships.
Or things like floating railroad ties or beams.
Or things like a coral reef in the Indian Ocean in the middle of the night.

Links :
  • GQ : The Rolex Sydney Hobart Yacht Race: 10 things you need to know