Dartmoor route tomorrow

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Jamesh
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Re: Dartmoor route tomorrow

Post by Jamesh »

Love it! from circumnavigation of Dartmoor to circumnavigation of the world!!!

Sorry I didn't pop into your local for a pint with you Mick F!

Can you shed any light on Peter and Mary Tavy?!!

Cheers James
Jdsk
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Re: Dartmoor route tomorrow

Post by Jdsk »

Jamesh wrote: 21 Aug 2021, 9:48pm Can you shed any light on Peter and Mary Tavy?!!
They're the dedication of the parish churches: St Peter's and St Mary's.

Jonathan
Jamesh
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Re: Dartmoor route tomorrow

Post by Jamesh »

Jdsk wrote: 21 Aug 2021, 9:52pm
Jamesh wrote: 21 Aug 2021, 9:48pm Can you shed any light on Peter and Mary Tavy?!!
They're the dedication of the parish churches: St Peter's and St Mary's.

Jonathan
Obvious now.

Thanks Jonathan!
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Mick F
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Re: Dartmoor route tomorrow

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philvantwo wrote: 21 Aug 2021, 8:18pm Francis Drake was born in Tavistock, was he the first man to sail round the world? No gps in those days though so how did he know where he was?
Mick F, did anything ever go wrong on any of your ships and you didn't know where you were, like in the Bermuda triangle?
Ferdinand Megellan's ships were first round the world, but he was killed in the Pacific somewhere. His crew carried on though, and they pre-dated Drake.

If you're really interested in how they navigated, you need to read the book "Longitude" and how Harrison invented the sea-going chronometer. Unless you know the time, you cannot know your longitude. Latitude is easy using the sun at its zenith and measuring the angle. All you need is a set of tables.

Basically, they sailed in a straight line until they hit something! :lol:
Then followed the coasts.

Anything going wrong?
We sailed away from Devonport December 1985 after a refit in HMS Sirius, and suffered a total machinery breakdown. We drifted in the wind and the currents and they sent a tug to tow us back except the weather turned nasty so the tug had to go back. Hours later, a bigger seagoing tug met us and dragged us back.

Whilst drifting, we were completely helpless. Ships without power turn sideways so the wind is on the beam. We drifted sideways for miles and eventually hit a large buoy which "ran over" as we pushed against it. The buoy damaged the underside of the ship and wrecked the propellors. The props on Sirius and her sister ships Phoebe, Cleopatra, Argonaut and Arethusa had very high-tech props for almost the lack of cavitation so they could be very silent when hunting Soviet submarines. Also, the ships had sound-deadening rubber tiles stuck to the hulls. Most of ours were wiped off by the buoy!

Very very expensive power failure and we had to go back into dry dock for a couple of months.
Mick F. Cornwall
Jdsk
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Re: Dartmoor route tomorrow

Post by Jdsk »

Mick F wrote: 22 Aug 2021, 9:19am
philvantwo wrote: 21 Aug 2021, 8:18pm Francis Drake was born in Tavistock, was he the first man to sail round the world? No gps in those days though so how did he know where he was?
If you're really interested in how they navigated, you need to read the book "Longitude" and how Harrison invented the sea-going chronometer. Unless you know the time, you cannot know your longitude. Latitude is easy using the sun at its zenith and measuring the angle. All you need is a set of tables.
It's an excellent book about a crucial piece of human history and a fascinating story of technology, but it doesn't have that much on how people actually navigated before they had a method for determining longitude.

The methods that Drake used are upthread. As well as our ignorance of what he knew I'd add our continuing lack of understanding of Polynesian methods. Any recommended reading?

Jonathan

"Longitude":
https://en.wikipedia.org/wiki/Longitude_(book)

and I'd add "The Island of the Day Before":
https://en.wikipedia.org/wiki/The_Islan ... Day_Before

PS: Has anyone else rubbed the statue's toe in Punta Arenas?
https://web.colby.edu/colbyatsea/2011/0 ... ta-arenas/

Image
Jdsk
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Re: Dartmoor route tomorrow

Post by Jdsk »

Mike Sales wrote: 21 Aug 2021, 8:55pm
philvantwo wrote: 21 Aug 2021, 8:18pm Francis Drake was born in Tavistock, was he the first man to sail round the world?
Some say that a Filipino or perhaps Sumatran, called by the Portugese Enrique de Malacca was the first to circumnavigate.
Enrique of Malacca (Spanish: Enrique de Malaca; Portuguese: Henrique de Malaca), was a Malay member of the Magellan–Elcano expedition that completed the first circumnavigation of the world in 1519–1522. He was acquired as a slave by the Portuguese explorer Ferdinand Magellan in 1511 at the age of 14 years, probably in the early stages of the Siege of Malacca (1511). Although Magellan's will calls him "a native of Malacca", Antonio Pigafetta states that he was a native of Sumatra. Magellan later took him to Europe, where he accompanied the circumnavigation expedition in 1519.[1][2] According to many historians, there is a possibility that he is the first person to circumnavigate the globe.[3]
https://en.wikipedia.org/wiki/Enrique_of_Malacca

I like the idea that the first was not a famous European, but a Filipino salave.
Makes a lovely change of perspective.

Jonathan

PS:
Tupaia, 200y later:
https://en.wikipedia.org/wiki/Tupaia_%28navigator%29
https://www.amazon.co.uk/dp/1729510221/
Mike Sales
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Re: Dartmoor route tomorrow

Post by Mike Sales »

Jdsk wrote: 22 Aug 2021, 9:44am
Makes a lovely change of perspective.

Jonathan

PS:
Tupaia, 200y later:
https://en.wikipedia.org/wiki/Tupaia_%28navigator%29
A not so lovely story is that of four kidnapped Fuegians.
When the Beagle returned to England in 1830 under Captain Robert FitzRoy’s command, it was with four Fuegian hostages: two grown men, a 9-year-old girl and an adolescent boy. They were given new names by the British – York Minster (El’leparu) and Boat Memory (whose original Yamana name has been lost, and who died of smallpox shortly after reaching Britain), Fuegia Basket (Yok’cushly) and Jemmy Button (O’run-del’lico, whose new name reflected the payment made by the British explorers to his family – a mother-of-pearl button).
http://www.ends-of-earth.com/history/ex ... xperiment/

The tragic story of their people is continued in https://www.goodreads.com/book/show/217 ... _the_Earth

It is indeed a very good read.
Rapturous praise met the publication of Lucas Bridges' marvelous chronicle of Tierra del Fuego when it first came out in 1947, and that praise has hardly abated these past sixty years, nor has a book been written which supplants Uttermost Part of the Earth as the classic work on Tierra del Fuego and the little-known culture of the now-extinct Fuegian Indians.

When the author was born in Tierra del Fuego in 1874, it was truly an unknown land. On the southern coast was the small settlement established by his missionary parents; the rest of it, over 18,000 square miles of mountain, forest, marsh, and lake, was the hunting ground of fierce and hostile tribes. Bridges grew up among the coastal Yaghans, learning their language and their ways. In young manhood he made contact with the wild inland Ona tribe, became their friend and hunting companion, and was initiated into the men's lodge.
It's the same the whole world over
It's the poor what gets the blame
It's the rich what gets the pleasure
Isn't it a blooming shame?
Jdsk
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Re: Dartmoor route tomorrow

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I'd included Jemmy Button in my post about other perspectives, and then deleted it because I thought that it wasn't close enough to marine navigation!

Fascinating story, and repeatedly challenges our assumptions.

Jonathan
Mike Sales
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Re: Dartmoor route tomorrow

Post by Mike Sales »

Jdsk wrote: 22 Aug 2021, 10:22am I'd included Jemmy Button in my post about other perspectives, and then deleted it because I thought that it wasn't close enough to marine navigation!

Jonathan
You have probably noticed how prone I am to wandering from the point, or thread drift as it is called.
It's the same the whole world over
It's the poor what gets the blame
It's the rich what gets the pleasure
Isn't it a blooming shame?
Jdsk
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Re: Dartmoor route tomorrow

Post by Jdsk »

We all use dead reckoning sometimes! And then correct for drift later...

: - )

Jonathan
Jamesh
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Re: Dartmoor route tomorrow

Post by Jamesh »

What happens if GPS gets switched off?.......

Most ships don't have Decca and wouldn't know how to use a sextant any more....!

Cheers James
Jdsk
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Re: Dartmoor route tomorrow

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Jamesh wrote: 23 Aug 2021, 9:54am What happens if GPS gets switched off?.......
There are now several independent systems.

What sort of scenario are you considering?

Jonathan
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Mick F
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Re: Dartmoor route tomorrow

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Jamesh wrote: 21 Aug 2021, 9:48pm Love it! from circumnavigation of Dartmoor to circumnavigation of the world!!!

Sorry I didn't pop into your local for a pint with you Mick F!

Can you shed any light on Peter and Mary Tavy?!!

Cheers James
Hi James, sorry, missed this.

I did a circumnavigation of Dartmoor some (few) years ago.
Up the A386 from Tavistock to Okehampton, then along the Old A30 via Whiddon Down and south via Moretonhampstead to Ashburton, then along the Old A38 to Ivybridge, then up the lanes via Cornwood and Yelverton.
Mick F. Cornwall
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al_yrpal
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Re: Dartmoor route tomorrow

Post by al_yrpal »

End of the world..Magellan replica ship. Tiny really?

Al


Magellans tiny ship
Magellans tiny ship
P1010489.JPG
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al_yrpal
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Re: Dartmoor route tomorrow

Post by al_yrpal »

Jamesh wrote: 23 Aug 2021, 9:54am What happens if GPS gets switched off?.......

Most ships don't have Decca and wouldn't know how to use a sextant any more....!

Cheers James
RDF! :lol:

Al
Reuse, recycle, thus do your bit to save the planet.... Get stuff at auctions, Dump, Charity Shops, Facebook Marketplace, Ebay, Car Boots. Choose an Old House, and a Banger ..... And cycle as often as you can......
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