Safety on the Open Sea

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Speech about OpenSeaMap at ChaosComputerClub (Bernhard Fisher)

Safe navigation with the aid of an open sea chart

In maritime shipping accurate positioning is vital to preserve damage to life, ship, and goods. Today, we might tend to think that this problem is sufficiently solved yet because of the existence of electronic positioning systems like, most notably, the Global Positioning System (GPS) or the Russian counterpart GLONASS.
This is wrong.
Positions in terms of latitude and longitude just make sense together with an accurate sea chart (and of course, together with a navigator that is able to translate charting data into reality).

Sea charts are available of national geospatial agencies and business companies as hard-copy or as digital maps and dependent on costs one might spend they are more or less accurate.

In today's open world the idea of making an open sea chart is obvious
Several projects now started to apply the rules used for the OpenStreetMap, "...a free editable map of the whole world.", to create a free editable sea chart of the whole world and it turns out to be much more difficult because of potential serious consequences in case of charting errors.

A sea chart contains a lot of vital information to a navigator.
It has to be accurate, up to date, and confidential.
Since we (the open sea chart community) cannot just chart every navigational important item on the world we are dependent on information that was already charted before or on third-party information.
The latter could be for example measurements or GPS tracks of people that are somehow involved into maritime shipping but not necessarily into details of marine mapping.
Thus, data accuracy may be questionable but still valuable.
The fact that unauthenticated people are editing data in an open database is a big challenge for an open community since safety and security of life heavily depends on it.

This talk covers the basic principles of sea charts and marine mapping.
It emphasizes the problems of an open sea chart in general and its distinction to an open street map since requirements to ensure safety at sea are very different.
Data preparation and import of other sources are discussed in detail, mainly focused on lights and depths.
The lecture will connect real world shortcomings to a pedantic definite IT world for an IT-oriented audience and approaches IT security from a different angle.

Links :

• Safe Navigation with an Open Sea Chart/Slides
• Safe Navigation with the Aid of an Open Sea Chart/Paper
  

Image of the week : Cocos (Keeling) Islands

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From NASA

The Cocos (Keeling) Islands lie in the eastern Indian Ocean, about 2,900 kilometers (1,800 miles) northwest of the Australian city of Perth.
Comprised of coral atolls and islands, the archipelago includes North Keeling Island and the South Keeling Islands.

The Advanced Land Imager (ALI) on NASA’s Earth Observing-1 (EO-1) satellite captured this natural-color image of South Keeling Islands on July 31, 2009.

Coral atolls—which are largely composed of huge colonies of tiny animals such as cnidaria—form around islands.
After the islands sink, the coral remains, generally forming complete or partial rings.
Only some parts of South Keeling Islands still stand above the water surface.
In the north, the ocean overtops the coral.

Along the southern rim of this coral atoll, the shallow water appears aquamarine.
Water darkens to navy blue as it deepens toward the central lagoon.
Above the water line, coconut palms and other plants form a thick carpet of vegetation.

In 2005, the Australian government issued a report on the Cocos (Keeling) Islands, summarizing field research conducted between 1997 and 2005.
Hard corals, which play a primary role in reef building, were not the only corals at South Keeling Islands.
Soft corals were also thriving at study sites throughout the reef.
Although coral and rock predominated, the researchers also found varying amounts of silt, sand, rubble, sponges, and seaweed.
Some of the coral had recently died, and coral predators appeared in high densities at some sites.
But overall, the report noted, “the coral reef community at Cocos (Keeling) Islands is very healthy and in a stable period, with little impact from anthropogenic activities.”

Scow sailing concept

David Raison has won the singlehanded Charente Maritime-Bahia Transat 6,50 on his innovative Proto TeamWork Evolution.

His achievement potentially represents a milestone in the world of offshore yacht racing.
Raison's boat, with her strange looking round nose, has excelled on this difficult course, but especially when sailing between 60 and 90° TWA, where she seems unbeatable, achieving speeds up to one knot more than her opponents.

David’s victory is in line with the history of the Mini Class, who has seen innovations such as canting keels, ballasts or carbon masts, used today on all race boats.

Nobody knows yet whether this type of boats will be seen on other, bigger classes in the future; yet one thing is sure: everyone is going to have to think about it.

E-Scow sailing at 35 knots, Toms River NJ

Links :

• Victory V38 : the ultimate sport boat
• YouTube : Melges C scow
  

Book review : The men who mapped the World/The treasures of cartography

They were the extraordinary pioneers of global travel who risked life and limb to chart the oceans. But last night, thanks to a West author, the remarkable story of the men who mapped the world was revealed. In the first book of its kind, John Blake, a retired Royal Navy Lieutenant Commander from Wiltshire, details the history of the sea chart and the stories behind the maps which changed the course of world history and were instrumental in the rise of the British Empire. It is illustrated with dozens of charts dating to the 15th century. Charting the oceans was mankind's biggest challenge for 600 years, …

"The Men Who Mapped the World" takes you on a journey through the history of cartography and is essentially a history of the world and how its territories were discovered and explored.
Maps have been an integral part of the way humans have lived for approximately 8,000 years. The first accurate maps were produced in Ancient Babylonia.

The earliest world map is the Babylonian World Map, which is symbolic and not an exact representation. It deliberately doesn't include the Persians or the Egyptians.
The Ancient Greeks also produced maps, although they were mostly imaginary reconstructions of the world. Maps have been crucial in the development of empires, have helped to win wars, and have encouraged man to venture further than his or her known boundaries.

Beautifully illustrated, "The Men Who Mapped the World" is a fascinating look at how the science of cartography developed, how maps are used not just for getting from A to B, and why cartography is so important to our history of the world and the world we live in.

Nowadays, we take the use of Sat Nav and Google maps for granted, but this book reflects on the fact that it all began with human imagination and the desire for knowledge.

Contents :
Introduction; Mapping in the Ancient and Medieval World; Cartography in the Age of Discovery; The World Expands-Filling the Gaps (1600-1800); Maps in the Age of Empires and Nationalism (1800-1914); Mapping the Modern World (1914-2011).

Pictures of the Basque Coast

Mundaka (Spain) -photo Laurent Masurel-

Wave in front of the 'Virgen Rock' in Biarritz -photo Laurent Masurel-

A basque moment in front of the 'Three Crowns' mountain (photo César Ancelle-Hansen)

 

 Alone in front of the Jaizkibel (photos César Ancelle-Hansen)

 Parlementia (photo César Ancelle-Hansen)

Links :

• 6feetandperfect : pure surfing photography