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A maritime mystery: What has been causing ships to sail in circles?

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3 hours ago, Catoni said:

It’s actually caused by Global Warming. And it’s all our fault. Al Gore and Greta Thunberg have been warning us.  We should listen. Global Warming causes everything and its opposite. It caused the Wuhan Virus also. World Socialism can save us. 

We are all living in a locker ... and don't even realize it ... 555

 

 

Edited by nobodysfriend

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I'm ex UK merchant navy and i know that any merchant ship regardless of nationality or the type of GPS system they use still take a sextant reading every day at noon to confirm their position

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18 minutes ago, Geordieabroad said:

I'm ex UK merchant navy and i know that any merchant ship regardless of nationality or the type of GPS system they use still take a sextant reading every day at noon to confirm their position

Helps to relieve the boredom too!

(An ex Marconi R/0)

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8 hours ago, Catoni said:

It’s actually caused by Global Warming. And it’s all our fault. Al Gore and Greta Thunberg have been warning us.  We should listen. Global Warming causes everything and its opposite. It caused the Wuhan Virus also. World Socialism can save us. 

No it's caused by capitalisme. In this socialisme doesnt exist, however egoisme the more.

See all "leaders" in their ways of ruling the world and the people.

As wars get less, they invented human deathly viruses. Not by nature.

We already had SARS and MERS and now Covid, which works more nicely.

But never the less not to many people die. So maybe in 2 years we will have another more effective one.

Or we must have a  tilt of the earth again, as magnetic poles are changing, and ice age is coming back. 

We will have a good controlling back by earth, many people die, it's cooling down again and we can start over, or not?.

If supervolcano Yellowstone park is going, then we are all doomed.   

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Clearly, it will be announced soon this is yet another COVID-19 side effect.

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On 6/4/2020 at 6:26 PM, rvaviator said:

A simple almanac + clock and sextant will do .... 🙂 ...  A long 'forgotten' art in the age of the iphone. 

 

Sure, that'll put you within a few hundred miles...

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AIS is not used for navigation and is only required on commercial vessels.

it is great when sailing as it helps you plot a course to avoid congestion.

Also it can be turned off if you believe it to be faulty. This article is fake news in my opinion 

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Just a couple of geological facts.

Magnetic pole reversals are common (in geological terms). There is no regular interval period, but can occur 1-5 times per million years as evidenced by magnetic orientation in rocks.

 

Yellowstone super volcano may cause a big eruption but they are very rare (once every 750,000 years?) and wouldn't even wipe out North America, let alone the world. May get a few years of winter though.

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When you're bored, go to marinetraffic.com and you can see what's sailing all over the planet.

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18 hours ago, rickudon said:

Just a couple of geological facts.

Magnetic pole reversals are common (in geological terms). There is no regular interval period, but can occur 1-5 times per million years as evidenced by magnetic orientation in rocks.

 

Yellowstone super volcano may cause a big eruption but they are very rare (once every 750,000 years?) and wouldn't even wipe out North America, let alone the world. May get a few years of winter though.

Maybe reversals are common (in geological terms), as in normal terms i would say rare. (1-5 times per million years)

This number indicates a guess despite "evidence" from rock And the effect is unknown, when it happens? Or we had iceage at that time? 

Weird you call the eruption of a  super volcano rare and not common. Odds against pole reversal is double.

Besides we wouldnt know what would happen, only speculate. All depends on how, how long and with what magnitute.

Fact is there will be big clouds, blocking sunlight and in the coulds acid, which will come down in acid rains.

It would be way much bigger then a Krakatau, they assume.

Fact is we dont know.

 

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Migrating fish and birds are also running into problems. 

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3 hours ago, xtrnuno41 said:

Maybe reversals are common (in geological terms), as in normal terms i would say rare. (1-5 times per million years)

This number indicates a guess despite "evidence" from rock And the effect is unknown, when it happens? Or we had iceage at that time? 

Weird you call the eruption of a  super volcano rare and not common. Odds against pole reversal is double.

Besides we wouldnt know what would happen, only speculate. All depends on how, how long and with what magnitute.

Fact is there will be big clouds, blocking sunlight and in the coulds acid, which will come down in acid rains.

It would be way much bigger then a Krakatau, they assume.

Fact is we dont know.

 

We know enough. In the last 10 million years, there have been on average about 4 reversals per million years - but only one in the last 800,000. Also less common during the Cretaceous era.

 

Yellowstone - It has erupted before, and didn't destroy North America or cause global extinctions. Many vulcanologists think it is over-hyped and shouldn't be rated as a super volcano currently. In the last million years there have been 5 global super eruptions, Mount Toba being the most powerful - it's 1815 eruption is also considered the most powerful eruption in historical times.

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