Thursday, March 7, 2013

The Viking Sunstone and how it's re-kindled my interest in fixing Maggie...

With the complete and utter lack of free time available at the moment, I've been considering selling Maggie.  

Actually... I've been considering selling Maggie for a number of years now - but i always convinced myself that after - insert random event in the future - there will be time to do whatever needs to be done so i can just sail.

Well, this time random event is the end of the summer nippers season, and the what needs to be done are:

  • get a new trailer built (or learn to weld and build it myself); and
  • fix the hole in the keel casing (refer to every yacht related blog post for past 2 years!! - I just checked and it's 2 years to the day since i found the location of the hole!!!)
But with prices for second hand, old boats at rock bottom it's really not worth selling Maggie, so she just been sitting in the yard...probably crying as all the other yachts are sailed...

The last few years i've been distracted with running / triathlon, etcetera...i think i need to find a balance!!

Anyway, let's get this whole thing back on track...

A friend (who is also a yacht broker) recently posted a replica Viking boat for sale on his website...

38 South Boat Sales
And then another mate showed me some photos he took of another Replica Viking Boat, which had sailed from Europe en route to Sydney...


And then today i read in the paper about the "Near-mythical navigation aid" The Sunstone, used by the ancient Norse Mariners...

Blah, blah...full article at end...

Anyway i googled Norse and saw the link to Norse Boats...well, that clinker style hull got me...


My sailing bug has returned!! Now to find some time to get Maggie back on the water...

Text below reproduction of this article


An oblong crystal found in the wreck of a 16th century English warship is a sunstone, a near-mythical navigational aid said to have been used by Viking mariners, researchers said.
The stone is made of Iceland spar, a transparent, naturally-occurring calcite crystal that polarises light and can get a bearing on the sun, they said.
It was found in the remains of a ship that had been dispatched to France in 1592 by Queen Elizabeth I as a precaution against a second Spanish Armada but foundered off the island of Alderney, in the Channel.
British and French scientists have long argued that the find is a sunstone - a device that fractures the light, enabling seafarers to locate the sun even when it is behind clouds or has dipped below the horizon.
Sunstones, according to a theory first aired 45 years ago, helped the great Norse mariners to navigate their way to Iceland and even perhaps as far as North America during the Viking heyday of 900-1200 AD, way before the magnetic compass was introduced in Europe in the 13th century.
But there is only a sketchy reference in ancient Norse literature to a "solarsteinn," which means the idea has remained frustratingly without solid proof.
In a study published in the British journal Proceedings of the Royal Society A, investigators carried out a chemical analysis on a tiny sample, using a device called a spectrometer, which confirmed that the stone was a calcite.
The original stone is about the size of a small bar of soap whose edges have been trimmed at an angle.
It is milky white in appearance, and not transparent, but the new experiments show that this is surface discolouration, caused by centuries of immersion in sea water and abrasion by sand, the study said.
Using a transparent crystal similar to the original, the scientists were able to follow the track of the setting sun in poor light, with an accuracy of one degree. In a second experiment, they were able to locate the sun for 40 minutes after sunset.
Other factors provide evidence that this is a sunstone, according to the investigation, led by Guy Ropars of the University of Rennes, in France's western region of Brittany.
The crystal was found in the wreckage alongside a pair of navigation dividers.
Tests that placed a magnetic compass next to one of the iron cannons excavated from the ship found that the needle swung wildly, by as much as 100 degrees.
Put together, these suggest the sunstone may have been kept as a backup to a magnetic compass.
"Although easy to use, the magnetic compass was not always reliable in the 16th century, as most of the magnetic phenomena were not understood," says the study.
"As the magnetic compass on a ship can be perturbed for various reasons, the optical compass giving an absolute reference may be used when the Sun is hidden."