How does math guide our ships at sea? - George Christoph
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- Опубліковано 30 вер 2024
- View full lesson: ed.ted.com/less...
Without math, would our seafaring ancestors ever have seen the world? Great mathematical thinkers and their revolutionary discoveries have an incredible story. Explore the beginnings of logarithms through the history of navigation, adventure and new worlds.
Lesson by George Christoph, animation by the Hobizals.
Mathematicians still blow my mind. I struggled to learn all the different types of Calculus, when 400 years ago someone 'invented' this stuff. Wow.
If your first name is "John", you're destined for nautical innovation, apparently.
Why 🥺explain and I will name my son John
I just watched the video now Ik why 😐.
Note...
Watch video before reading comments.
That’s why john Wesley Hyatt is one of them.
John Wayne Gacy was the innovator of killer clown.
Such as John Aubrey
i don't think i would be destined to...
Cross pollination between disciplines is an under appreciated but vital piece in understanding how knowledge and technology has been expanding at an exponential rate ever since the dark ages. “If I have seen further than others, it’s because I have stood on the shoulders of giants.”
Before that they just guided following Portuguese and Spanish ships ;-)
I whole heartedly agree. Talk about a narrow, Anglo centric, story leaving the entire age of exploration out of consideration.
There is an error in the video, the sextant is used to measure the ship Latitude and not Longitude.
The sextant doesn’t measure Latitude or Longitude directly, it only measures angles, mainly vertical angles between a celestial body like the Sun and the horizon.
In addition to sextant you need a clock set to GMT ,a nautical almanac and pre calculated tables or electronic calculator to calculate the long. and lat.
Astrolabe was the first device based on constellations and many celestial markers to give the exact latitude for which sailor sailing and then after getting to required lat. The sailor use to sail just in East or west direction to get the desired location.
ek no.
There is so much incorrect information in this video. The sextant was not the first instrument that could measure the angle of the sun above the horizon. Comparing the altitude of the sun in England is not how anyone determined their longitude...ever. Lunars were not measured to the horizon, they were measured to other celestial bodies...and the calculations didn't take hours. SMH
I caught that too.
I don't know enough to answer all of this, but I do know the calculations did take hours prior to Bowditch's discovery of a new way to work lunars in the 1800s. You're correct that shooting the sun with a sextant didn't determine longitude. They could use it to determine latitude.And lunars to determine longittude were done shooting the moon and HOURS of skilled math labor. Usually it was days later and the longitude discovery wasn't that helpful. Most ships didn't have someone on board in the 1800s who could even do the math. Bowditch discovered the way to make it faster and published it in the Practical Navigator.
No.
1) Lunars only took hours to complete around the years 1763-1767, when navigators had to directly compute the position of the Moon in addition to clearing the lunar distance using tables published by Tobias Mayer. After that, Nevil Maskelyne began publishing the Nautical Almanac which contained pre-computed lunar distances, reducing the time required to around 20 minutes. Any method that required days to determine longitude, even for mariners who weren't the brightest mathematicians, would have been considered absolutely useless. Even a dead reckoning longitude (easily calculated in a minute or two, and often reasonably accurate) would have been preferred over that.
2) Nathaniel Bowditch did not "discover" anything about lunars, except maybe that people had already been using them for some time. What he did do was to streamline some of the calculations already in use. (Those calculations probably having been devised by Mendoza Rios.) What would later become the "New American Practical Navigator" started out as a revision of Hamilton Moore's "Practical Navigator". The "New American" version wasn't published until 1802. By that time, John Harrison's chronometer design was beginning to become widely available and lunars were falling by the wayside in favor of the time sight for determining longitude. By 1850, lunars were seldom used at all.
3) Shooting the Sun can be used to determine longitude, but it is difficult to do accurately and therefore was [is] seldom, if ever, used. My point was that, when using this method, the time difference between local area noon (LAN) and noon at Greenwich is what is being compared to determine longitude...not the altitude of the Sun. One can actually determine both latitude and longitude from a set of noon sights - latitude from the altitude of the sun and longitude from the exact Greenwich time of local culmination. But, historically, the method most used was: time sight in the morning for longitude; noon sight for latitude; time sight for longitude again in the evening.
Don't get me wrong, I love the "American Practical Navigator" (or simply "Bowditch"). I refer to my copy often when I need to refresh my memory on some particular topic. But it was hardly a ground-breaking work when it was published. Anyone interested in discussions on these topics and more should visit NavList at www.fer3.com/arc and search the archives or even ask questions of the many extremely knowledgeable members. There's also an extensive collection of resources available for free, including many historic editions of Bowditch.
Cheers!
Excellent information. Thanks!
How do you know all of that seanpatrick78?
I really love TED-Ed.
TED-Ed is amazing!!
Thank you for making awesome stuffs :)
You make it sound like it were the british that first started sailing the oceans using mathematic..
well they always try to whitewash western history, e.g. Roman Empire and the Ancient Greeks are being claimed as theirs, funnily enough, they're hands don't always get full
When all seems to be against you, remember, a ship sometimes has to sail against the current, not with it. Don't spend your entire life building a ship, without ever tasting the salt of the ocean. If a ship is strong, the ocean's tides do not bother it.
How did logarithms help in navigation? I would've expected trigonometry
A great question IMO. I am not sure how they fit into navigation methods like the lunar distance method.
In making calculations easier. That's how a slide rule works.
the Polynesians the worlds greatest navigators were able to travel without instrument except their brain[what knowledge it contains]
Eddy has just made the music available on his SoundCloud page, titled "Maritime Mathematics".
Great video TedED, especially the ending!!! I am almost done with masters in law school, and I dont see any cross pollenation within my field that makes it into the education itself.
not much dead reconing when you cross the ocean
that's a variation of bach's cello suite No. 1 Prelude
جميييل جدا شكرا لك على هذه الافادة
اللغة العربية فخرنا فضعاف الشخصيات هم اللذين لا يفتخرون بها
وين الترجمة ؟؟؟؟؟
This makes roman reigns look strong
John Bird the Sextant, John Harrison the clock,
John Napier, the Math
and Henry Brings the solution.
By far the best TEDEducation video to date. Please hire George Christoph and make some sort of agreement with The Hobizals, this was amazing.
Amazing wow just wow very nice presentation
When all seems to be against you, remember, a ship sometimes has to sail against the current, not with it. Don't spend your entire life building a ship, without ever tasting the salt of the ocean. If a ship is strong, the ocean's tides do not bother it.
Hi Ted-ed! this video is fascinating!! Could you make a video on the origins of trigonometry please?
What is this video: a guy talking or a harpsichord recital?
The branches of knowledge always come together to achieve great things, they could make a video about spiders and their web.
One of the best TED-eds!
Another almost useless video for people who were turned off math at a young age. You skipped the most critical part that will tell kids why knowing how to do logs was necessary for sailors. Instead of telling kids this is how it is, give them the reasoning behind it. So what exactly is a logarithm? What was Napier's reasoning for using his base number? What is e? A video with very little substance.
so is this video supposed to be an in depth math lecture or a basic summary about history?
if you want to learn this stuff go on khan academy or smth don't rant about it in a comments section
What do logarithms have to do with navigation though...
just for science can i share this video in my channel ?
The sextant, the clock and logarithms are not arab inventions.
What I understand is clock and sex shits
OK..but I still didn't get the answer to the question that was the header of the video.
by calculating the position of the ship and the hour.
@@nordin.munteanu you answered me after 7 years! Wow.
thank you , Math is the best Way for Life !!!
how do logarithms help help navigation?
Logarithms make tedious mathematical operations, like multiplying sines, cosines and tangents, etc. much easier and less prone to error by reducing them to simple addition and subtraction.
We use napier rules in navigation
*Wow I can’t stop recommending trustedtech94 @ gmail com/what’s app +13182391871.for the great help,his really good,fast and reliable.I now know the location of my vessel at every point in time.thanks a lot.*
TedEd ROCKS
I love it
I love logs
One of my favorite lessons so far. :]
I really liked the music playing in the background too. :D
It's fine but mixed way too loud
TedEd ROCKS
I love it
What I remember about John Harrison is this snippet from Empire Total War:
... Clearly, improvements were needed in navigational tools and the British Longitude Act of 1714 offered the immense fortune of £10,000 to anyone who could devise a method for successfully calculating that element of a position. English clockmaker John Harrison (1693-1776) did eventually produce a chronometer that kept very accurate time, but spent more effort in trying to get the money out of a recalcitrant government committee!
gorgeous!
गोड विडियो। मेरे बेटे को आपके वीडियो बहुत पसंद हैं। इस अच्छी जानकारीपूर्ण वीडियो को जारी रखें
Seems odd, but I thought this video was Epic. :)
So many johns
No, not really. Commenting (even the useless ones) are a key component in UA-cam's popularity algorithms. If a video gets tons of comments, it climbs the ladder of popularity, and is easier to find.
yeet
And no mention of Mercator who made it possible on a long-long distances via rhumb line.
Interesting stuff on logs but no mention of what that has to do with navigation.
The brits are get all of the credit in this video...Well I suppose it's correct. But there must have been some latin contributions to the Age of Discovery and Colonialism.
this is so good
i would like to get a script of this video and other video too
is it possible for me to get
please let me know
Nami swaaaaan
TOO MUCH NOISE ET YOU HAVE NOTHING TO DO WITH EDUCATION .
I'm having déjà vu.
Okay
A
The Novel Mason & Dixon brought me here .
music is very loud, makes it hard to listen to the story
Creativity is about cross pollination
As a lot of people have already said here in the comments; fantastic TedEd video.
how you think she is so good at bargaining and counting money?
I'm a sailor and after watching this video I feel so ashamed. I can't do that math anymore to fix my position at sea. :((
*Wow I can’t stop recommending trustedtech94 @ gmail com/what’s app +13182391871.for the great help,his really good,fast and reliable.I now know the location of my vessel at every point in time.thanks a lot.*
The music was actually composed for the video by Eddy Hobizal but is most certainly in the stye of Bach.
I like it, but it's a bit too much for me. It seems like there are a couple different tracks playing at the same time, and distracts me a bit from what he's saying.
Some variation of Bach's Prelude in C Major.
Does anyone recognize the background music?
*er
Nice video. Which software did you used for editing?
3:49 how about pirates?
Maybe more like ghuurrduurr ... :D
its funny how they'd navigate the flat earth
the Earth is not flat.
2nd Time iv'e seen this
why was it re-uploaded?
No, she was a magician!
3rd
Wow really good lesson.
No entendí... :v
Kudos on the accents, I'm too lazy for that kind of thing
*Wow I can’t stop recommending trustedtech94 @ gmail com/what’s app +13182391871.for the great help,his really good,fast and reliable.I now know the location of my vessel at every point in time.thanks a lot.*
wat is this music
Good video TedEd
Mathematics!
nice video
Awesome
:P made me laugh
Boats.
dammit
wow
وااااووووو
Well, that's fascinating... but how did the Polynesians manage to navigate all over the worlds largest ocean in double hulled canoes before the invention of these amazing tools? Of course, the way our story is told, it's usually implied that it was purely accidental. Um... nope. The Chinese, too. These Europeans were latecomers to the game.
Michele Kire Luck maybe. Tons and tons of luck and experience at sea. I would think that if that is all you have at hand you'll just have to make do with whatever you have and hope for the best.
Not to mention he lied about the sextant and didnt even mention the astrolabe or compass. Like, way before the 1700's, in the 1400's, the spanish and portuguese had compasses, astrolabes and other tools that helped them circumnavigate the globe and make the first accurate maps of the earth. And on a side note, the chinese had compasses and astrolabes from the arabs and not to mention that polynesians and vikings had tools like the sun-disk and even simple tools like 2 sticks can be used to guide yourself with either the sun or stars
If you're interested this video explains how we can use sticks for navigation ua-cam.com/video/2Bv8dc19HQ0/v-deo.html
and from memory i recall that the aztecs and maya used 2 sticks to tell which time of the year they were in
Actually, it was an American who invented the Sextant. The British 'inventor' was told about the use of the Sextant, and he built one with similar properties. It was because a British sailor seen the American invention being used while he was in close proximity to the American ship, and then told the British 'inventor' about it.
this is why we are stupid now, *looks at gps*
White lie.....😶
wahaha so many one piece fans watch ted too