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Old 05-02-2010, 09:24   #436
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I have a question related to the survivability / "waterproofness" of important equipment such as the wind generators, and solar panels.

I realize they function in the rain, without problem, but how about when they are totally immersed in salt water for a period of 10 seconds or more, which is what likley happed during some of Jessica's more serious knockdowns.

I would think that this would fry them, if they are not ripped off or broken by the water. I assume her's made it through Ok, as I haven't read about a loss of ability to make electricity.

Anyone have insight and / or experience as to what they can take, given today's reliance on electricity for navigation, communication, etc?
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Old 05-02-2010, 10:39   #437
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Antipodes are the end points of an earth diameter. The rules do not require you to cross antipodes. The conventional Robin Knox-Johnson type rules require:

1. Depart and return to the same port.

2. Cross the equator (x 2).

3. Pass through all lines of longitude; and

4. Round Capes Horn, Good Hope (Algulhas), and Leeuwin. You need not round Tasmania or New Zealand - running the Bass Strait is permitted.
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Old 05-02-2010, 11:09   #438
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Quote:
Originally Posted by Northeaster View Post
I have a question related to the survivability / "waterproofness" of important equipment such as the wind generators, and solar panels.

I realize they function in the rain, without problem, but how about when they are totally immersed in salt water for a period of 10 seconds or more, which is what likley happed during some of Jessica's more serious knockdowns.
Solar panels typically ok with a (short) dunking,

Wind generators typically not, but some models are better sealed than others.

Don't ask me how I know
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Old 05-02-2010, 12:24   #439
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Antipodes are the end points of an earth diameter. The rules do not require you to cross antipodes.
Since there are no Rules that is an accurate statement.

However ... crossing two antipodes was indeed an accepted and indisputable definition of a circumnavigation when the first records were set.

What Is Solo Circumnavigation

and from What is a True Circumnavigation? :

Quote:
'[A] true circumnavigation of the world ... where the track passes over 2 points antipodal to each other ... a circumnavigation where the vessel passes through two points on the earth's surface which are diametrically opposite each other ...'
Sir Francis Chichester, Gipsy Moth Circles the World, 1967.


THE FIRST CIRCUMNAVIGATION OF THE GLOBE passing through antipodal points was completed in 1522 by 18 members of Ferdinand Magellanís expedition to find a route to the Spice Islands by sailing west. Magellan himself was killed en route on the island of Mactan in present day Philippines.
Those are just the first two hits when googling for "circumnavigation antipode"




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Old 05-02-2010, 13:37   #440
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Yes, I should have said something like "The conventional Robin Knox-Johnson type "rules" do not require crossing antipodes."

Anyway, I think I fairly implied it. As far as I'm concerned a circumnavigation of Antarctica or a combined Northwest/Northeast Passage counts as a kind of circumnavigation. Magellan's crew would not have met the conventional Robin Knox-Johnson type "rules" because they did not round Cape Horn or Leeuwin. This standard was set by the London Sunday Times solo nonstop unassisted race in 1968, except that you no longer have to depart from and return to England.
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Old 05-02-2010, 16:53   #441
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Re Jesse Watson's wind charger. This is a a special model she chose herself, against the advice of DM. She has spare replacement blades, and also a complete spare unit. The info is all on this page. PWT - News & Views

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Old 10-02-2010, 00:33   #442
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So am I right in thinking she has to cross the equator again?

If so, I wonder why she didn't do it as a part of the current leg since she went up to about 25S.

I suppose she must be considering doing it in the Indian Ocean.

Anyone got any thoughts on this? I can't get an answer from her shore crew.
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Old 10-02-2010, 01:15   #443
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So am I right in thinking she has to cross the equator again?
No.

The convention which she is following does not require that. This was covered in posts 430, 433 and 437 of this thread. She has already crossed the equator twice as required (once going north, once going south).
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Old 10-02-2010, 01:28   #444
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No.

The convention which she is following does not require that. This was covered in posts 430, 433 and 437 of this thread. She has already crossed the equator twice as required (once going north, once going south).
You're quite right, of course, but it doesn't seem to be quite cricket...as in the way Knox edicted, given he asserted one had to pass through opposites, and the tactic of doing a simple loop over the equator may give rise to a protest.

Given she went over the equator at around 156E, I would have thought she would have to cross again at 156W.
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Old 10-02-2010, 05:50   #445
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Who's going to protest? There is nothing official about this since she is underage and the official recording bodies have disavowed such activities. She can do what she pleases and publish her books, etc., about her adventures as they actually occurred without having to worry about any form of official recognized sanction, etc. Many old sailors throughout history "set records" without the existence of any "official body" to set rules.
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Old 10-02-2010, 09:09   #446
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Well put, osirissail. And although the record-keeping body no longer supports the "youngest" records, Jessica (and Abby Sunderland, Mike Perham, Zac Sunderland, et al.) has chosen to adhere to the requirements established and accepted when there was an official element to the quest, so it's hard to take seriously any objections at this stage from those new to the whole concept. And, seemingly, puzzled by it.

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Old 10-02-2010, 12:47   #447
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The 'best' record in this context was the recognition that Magellan gets for the first circumnavigation when in fact he ,personally, only made it as far as Asia where his relentless prosletising got him killled.( Mr Sunderland please take note).
His pilot (whose name escapes me) completed the voyage for him, but is rarely credited .
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Old 10-02-2010, 13:55   #448
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You're quite right, of course, but it doesn't seem to be quite cricket...as in the way Knox edicted, given he asserted one had to pass through opposites, and the tactic of doing a simple loop over the equator may give rise to a protest.
Sorry but that's just not correct.

Have another look at post 437. Those are the conventions Jessica is following, and they are the same as those used by Knox-Johnson, and also by the official record-keeping body the WSSRC (see post 430).
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Old 10-02-2010, 14:08   #449
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I would agree that paradix and TaoJones are saying this exactly right.

And just for discussion sake, consider the geometry involved:
First, to get back to the place you start, you have to cross the equator an even number of times. If there an odd number of crossings you end up in the other hemisphere from where you started.
And second, if you did set out to cross over two opposing points on the globe, they cannot both be on the same side of the equator. Any point in one hemisphere is opposite a point in the other hemisphere.

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Old 10-02-2010, 14:47   #450
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Originally Posted by slomotion View Post
The conventional Robin Knox-Johnson type rules require:

1. Depart and return to the same port.

2. Cross the equator (x 2).

3. Pass through all lines of longitude; and

4. Round Capes Horn, Good Hope (Algulhas), and Leeuwin. You need not round Tasmania or New Zealand - running the Bass Strait is permitted.
Could you provide a reference for that in any way being attributed to Robin Knox-Johnson ?

While your point is moot since Jessica is not going after any official record it is appropriate that R-K-J be recognized for indeed rounding two antipodal points. I doubt Pink Lady's captain would want to deprive him of that recognition as she makes progress in her quest.


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