WTF is a "Nautical" Mile??

[@charlesspringer4709]

Fascinating! But you kinda missed "what is a knot"? The deal with a nautical mile being a geodesic with an arc that spans one minute of angle ( 1/60 of a degree). But what good is that? Well if you are on a ship and take a piece of a log or stick and throw it overboard with a string attached and a knot in the strong every 47 feet, then count how many knots pass out in 28 seconds the result is nautical miles per hour, or knots. You then pulled the log back in and entered the value in the ship's notebook along with the weather and any interesting items. This is the 'log' entry and the notebook came to be known as the ship's log. You need a clock or egg-timer type little hourglass or something for the time. And the speed is speed through the water and does not account for currents, etc. Like air speed versus ground speed. And thus a nautical mile is one minute of arc on the Earth's surface. And a knot is one nautical mile per hour. The funny thing is naut and knot are not related etymologically. Ship speed is deceiving because it travels day and night. A ship that only goes 6 miles per hours still travels 144 miles per day.

[@mitchellminer9597]

Fascinating. Well written. The egg timer can be any convenient number of seconds, and the knots can be at any manageable distance apart ... PROVIDED they are calibrated to each other. The secret is that they are both the same fraction of their respective units. A three-minute egg-timer is 1/20th of an hour, so the log line gets knots 1/20th of a mile apart. It's probably easiest to buy a sandglass, check it for time, and then have someone tie knots in a rope to match it.

[@johnlogan8218]

The earth has 24 time zones and the nautical mile divides the earth 15 degrees is one hour x 24 is 360 degrees

[@bendeleted9155]

I now know knot from naut, but I don't know dreadnought from Dred Scott.

[@JBrd79]

Holy cow, YOU should have made the video, lol! Thank you for that interesting information! That was well written and you explained it in a simple, yet effective manner. Good on you, bro, thank you! :)

[@Kosh_Naranek.]

Were you a quartermaster or 2nd mate by chance?

[@livinginvancouverbc2247]

What makes nautical miles even more useful is when you're on the water and using a navigation chart, the vertical edges of the chart have the minutes of latitude. You use a 2-arm compass (not a magnetic compass) and spread the arms until one point is one your location and the other is on the destination. You then simply place the points on the vertical edge of the chart and count the minutes of latitude and that's your distance in nautical miles.

[@jamestiscareno4387]

Seems it would to difficult to be accurate with the constant rocking of the ship. Still fascinating technology for its time.

[@davidwarland2680]

lol used at sea hey, wow, who would have thought. "nautical " anything had anything to do with the sea

[@planespottermerijn]

​@@jamestiscareno4387 this still happens lol. It can be a bit of a pain in heavy seas but practice makes perfect

[@allangibson8494]

Unless you are using old French charts that use kilometres and gradians instead of degrees…

[@blacktootherson]

@@jamestiscareno4387just takes practice and experience, like all important skills 💯

[@violetLizard]

The thumbnail going straight into the video was absolutely magical!

[@JH-lo9ut]

I have been sailing boats since I was a child. I still remember when I first understood how nautical miles work, and how useful it is as a unit of measure. I learned to navigate on paper charts, and I still prefer to do so, rather than using a GPS plotter. It gives me a kind of situational awareness that I can't get from a little led display. The relationship between distance, time and speed is easy to calculate, and super well adapted for a sailing vessels that move in the ranges of 0-10 knots

[@LauraKnotek]

What determines a knot?

[@gaetanoroccuzzo]

​@repentandbelieveinJesusChrist1 sure, after you, you first, age before beauty, will follow you closely, right behind you...

[@Belly-u2w]

@repentandbelieveinJesusChrist1 But will he tell us the distance in feet of a nautical mile?

[@mikemaresca4999]

Former Navigator/Bombardier on the B-52, can confirm that all you say is true, and applies to the aeronautical as well.

[@KraterStromboli]

​@@LauraKnotek 1 knot = 1nautical miłe per hour, it is an unit for velocity. 1.852 km/h.

[@Sailor376also]

Willy Snellius got the measurment a little small,, because he was measurin near the 45th parallel,, which IS a little small as compared to the Equator. I saw his calculations printed out years ago. He did his calculations perfectly,, and then threw in a fudge factor, a guess, based upon this fore shortening when approaching the poles. His guess was also based upon a perfect sphere. Of course, it ain't. It was a good guess. I particularly loved, was impressed,, by this long winded perfect math calculation... and then he threw in a 'guess'. Thus is written good science.

[@codiserville593]

Wait wow, that's pretty amazing

[@joewithatrademark]

I actually love this video. Your understanding of sophisticated storytelling, simple visuals and effortless editing literally made me say out loud, "I love this video," to myself. I hope reading that makes you smile mate.

[@armanke13]

I won't call it "effortless"

[@gaetanoroccuzzo]

@repentand.......... Sure I will. What is his email address?

[@MrPoornakumar]

@@gaetanoroccuzzo That's a good one !

[@MountainFisher]

I remember studying navigation to acquire my charter licence. There was no gps in the 70s and I had to learn dead reckoning which involves a good compass and knowing one's speed. I also learned how to use a sextant which I used often just to practice. It isn't that hard actually. 1.15 mph= knot or nautical mile.

[@IIZCHAOS]

Had to learn the same 2 years ago when I first joined the coastguard. Even tho we can do it on computers they still make us learn with old charts as well. Keep the skills alive.

[@thebatman6201]

Computers get wet and die​@@IIZCHAOS

[@David-hm9ic]

Having been a sailor for most of my life I appreciate the full explanation of the nautical mile. OTOH, it is quite ironic that a channel named "Get to the Point" takes almost 11 minutes to say how the nautical mile was derived. You do have great production values and I wish you success with the channel.

[@RoderickEmanuel]

Soccer whit theffcuert.

[@Redmenace96]

Great YT content! Enjoyed it, and learned something. Production values were top notch. Mentioning Monaco as a meeting place for science, and putting up a panel with race cars is pure gold.

[@JFBassett2050]

GREAT work!! GREAT work!! Now I know what a Nautical Mile is, and why it is important, and all the rest of it!!! GREAT work!!

[@zander7513]

Love the Ben Prunty soundtrack in the beginning, and the "second brother" tangent made me laugh. Take my subscription!

[@sadhucat4476]

This is awesome. The narration/presentation style is rad and the content is super interesting.

[@werdna2231]

“rad”? Are you posting comments from the 1980s😂 Just kidding. I agree with your enthusiastic opinion.

[@RoderickEmanuel]

This is autumn. Oh yeah, guys.

[@theduke8504]

Wonderfully presented information! I always wondered what the difference was between the two measurements. Now I know, thanks!

[@gaetanoroccuzzo]

​@repentandbelieveinJesusChrist1certainly pal, as you say mush, indeed my fellow,

[@Jackz.artist]

Bro this channel is going to grow! The concept, the topics, the little brother on the background😂 well done guys

[@jtgd]

And the narration

[@DeviilReaper]

Bro this video makes me want to play FTL again.

[@gumpwumper3752]

Thought the exact same thing!

[@nikola920]

I wondered if it had launched in the background for some reason...

[@serenissimarespublicavenet3945]

It is worth noting that the “nautical” mile was also the Italian mile, that is the regular system of measurement used throughout Italy, on land or at sea, before the metric system. I don’t know how the Italians got to 1/60th of a degree, but I’m sure it wasn’t through a Dutchman and and an Englishman, so it must have been independently invented more than once.

[@benjaminl429]

I love the way the thumbnail transitioned seamlessly into an animation. Not sure I've seen that before.

[@keboonplumeria5266]

I love all these origin of words. Love your crude explanation

[@larryscott3982]

A nautical mile is 1/60°. aka: an arcminute. As navigation is in degrees by astro observation, (astrolabe and sextant), and degrees of latitude longitude and great circles are cited in sexagesimal divisions of degrees, the arcminute was about the smallest angle that could be typically measured. And the arcminute - an angle - was essentially renamed nautical mile. Knowing that the length in distance of arcminutes varies is a minor concern in navigation. So Brits had the most maps and the Admiralty nautical mile was rounded off to 6080 ft, close enough. And the fact that 1 nautical mile is somewhat close to a statute mile made distances easy to comprehend. Especially when making 3-4 knots in a ship. And in calculation nautical miles times 60 equals degrees. And calculation is by trig function so no need for feet meters or statute miles.

[@SHO1989]

Sad I never learned this in school 50 years ago and I ended up learning this by watching TV. Thanks for finally enlightening me. Thumbs up and subscribed!

[@MrPoornakumar]

@brucelyon6398 It is never too late to learn. In school (& college) the studies, is rushed through. It never gives an opportunity to "learn" or savour what one learns. All that comes later. But yes, as a student one must learn where to look for, if one wants to learn a new thing. This generation is lucky in that (but true facts should be "presented", not some tales which are far from true & that demands discretion).

[@andrewsammons9643]

OOHHHHHHH THE THUMBNAIL TRANSITION IS SO CLEAN HOLYYYYYY

[@leonardor8264]

You forgot the most important piece of the puzzle in navigation on the sea. The development of an accurate naval chronometer so that longitude can be solved.

[@peteh8077]

Antikythra mechanism.

[@samuelgarrod8327]

He didn't forget. This video is not about that.

[@kitpong1777]

Nautical miles, and their related speed measurement knots - nautical miles per hour - are so deeply entrenched in worldwide marine and aviation use, they easily survived the conversion to the metric system.

[@nick21614]

Aviation also uses feet so they dont use the metric system except in China / Russia.

[@GBOAC]

@@nick21614they use the metric system for everything else in aviation, an Italian pilot is not calculating the fuel in gallons or the runway length in feet

[@andresmartinezramos7513]

​@@nick21614It has long been agreed that in time all aviation matters will be done in metric. The problem is that since there is no explicit deadline in the international agreement and the legacy regulations and infrastructure are so extensive, we never get around to actually doing it.

[@BuggsOp]

That transition from thumbnail to video is pretty f*ckin clever

[@lukeselker5175]

Subscribed! Did not know I was interested in this, but you've done such a great job of presenting this information that I stayed and watched the whole thing!

[@q8386]

Earned my sub. Great presentation.

[@balthazarasquith]

Not going to lie this video was far more entertaining and interesting than the title may suggest. 👍👏👏

[@JeremyCCox]

The Brother - Brother conversation style is a great way of doing this! Its like a podcast but I actually care.

[@veramae4098]

Queen Isabella was a ruling queen in her homeland, Castille. Her marriage to Ferdinand of Aragorn was political uniting the two largest kingdoms within "Spain", and the marriage document specified they would be joint rulers of their joined lands. But the diplomats, courtiers, and anyone else in court treated her as just a figurehead, just another queen for children. This drove her nuts. Part of the reason she funded Columbus was, if he succeeded, her status would rise astronomically. Fascinating woman. The stories that she sold her royal jewels to finance Columbus, is only a metaphor

[@larryscott3982]

She didn’t sell her jewels, she more or less wagered her crown. Or… she decided o keep the expense off the books in case of failure, so that she wouldn’t get hammered as foolish.

[@allangibson8494]

Aragon - Aragorn is more Tolkien…

[@andresmartinezramos7513]

While she was definitely a great woman and competent queen she did get married to one of the greatest statesmen of her time. So most proceedings and decisions defaulted to Fernando. Her being a woman didn't help either.

[@Doggieman1111]

Fantastic video, subscribed.

[@TThomas-si7yn]

It's fun to think about the history of scientific thought; how a thought started, how it evolved, etc. So, they got the latitude (space) part right, then along came the addition of time, allowing for longitude. Such a great way to visualize Special Relativity and the concept of Space-Time. (General Relativity includes gravity)

[@hannesswart4827]

Space time and GRAVITY, can you explain how the moon circle the earth when the earth travels 66600mpu?You can start with full moon when the sun,earth and moon are in line? Go in detail like your comment.

[@MrTimezone2]

Great learning experience and hilarious, Good shit.

[@codiserville593]

Whoa, you know what? This makes me realize, the history and endeavor to plot out, map, and calculate is worth a whole series of videos! Also that so much of human history has been dedicated, trying to do that

[@jadenephrite]

Regarding 9:17, one nautical mile is one minute of arc length along a great circle around the earth. Since there are 360 degrees around the circumference of a sphere, 360 degrees is equivalent to 21,600 minutes of arc length which means 21,600 nautical miles. Regarding 10:13, the original definition of one meter was one ten-millionth of the arc length from the equator to the North Pole along a meridian. Therefore the circumference of the earth would be 40,000 kilometers. The length of one meter was inscribed between two marks onto a bar made of 90% platinum +10% iridium alloy and stored in Sèvres, France.

[@allangibson8494]

And the French used gradians for angle measurements with 100 Gradians for a right angle and 400 Gradians in a circle…

[@Chris_at_Home]

I always remember the saying “ a mile a minute the world around”

[@allangibson8494]

@ Except the only country that uses the Imperial mile is the United States… (Liberia and Myanmar went metric years ago).

[@charlesspringer4709]

@@allangibson8494 The USA is officially SI. The inch is defined as exactly 25.4mm (The US Customary units are a metric just like Imperial is a metric. The French Revolution metric is Systeme International). Miles are much more fun when you learn how it is all connected from furlongs and acres to rods and chains and yards.. But the best part is all the customary units are one syllable and do not sound like each other. Inch foot yard mile cup quart ounce pound. It is very hard to make a mistake. The French science and math geniuses COULD have said lets take a standard yard, one of theirs or the one in London, and give it a second name that is more Greek and Latin because we are scientists, like meter. Then we make 100 divisions, etc etc. Everyone would be on the same standard and could use the divisions of 12 and 16 that make rational arithmetic so easy or the 10's. Mark rulers with both. But no, they had a much more convenient idea. Base the meter on walking from the Equator to the North Pole. What could be simpler? Oh, make the bits that are smaller then1 meter have Greek prefixes and the ones that are bigger get Latin prefixes. That way nobody (nobody who needs to know like us, we are scientists) will get confused.

[@allangibson8494]

@ Until last year the U.S. had two different definitions of the inch - the standard inch and survey inch… The French’s problem was they had thirty DIFFERENT standard yards in use prior to the revolution - one for every major city. And they weren’t just a “little” different either. A foot could have between 10 and 17 inches (which also varied in length). Ditto other weights and measures. The French military had no idea what they were actually paying for.

[@mikejacob3536]

And in just 55 years since Britain accepted the nautical mile standardized throughout the entire world, we have public school victims convinced that the Earth is flat...😒

[@Datan0de]

To be fair, a lot of flat Earthers are homeschooled, too.

[@tedvillalon4139]

The world was proven round ca. 200 BC.

[@Datan0de]

@@tedvillalon4139 We know. We're commenting on the rising tide of ignorance in the world.

[@rollamichael]

Glad you found a good cacio e pepe video to use in the pepper section of this video 🤣

[@maxsaviation9512]

Most people don’t know nautical miles is always used in aviation too

[@johnvrabec9747]

Yes. NASA used the NM for their missions. They used feet per second for velocity, but nautical miles for distance.

[@andresmartinezramos7513]

​@@johnvrabec9747NASA has always used metric

[@chilkootsailor492]

This channel is about to blow up. Mark my words.

[@ETime97]

Funny, fantastic and just an all round great video thanks man !

[@FutureAIDev2015]

The first thing I thought of when I saw the title is the meme "Wtf is a kilometer?!" 😂

[@netaverse7694]

Finally someone that doesn’t sound scripted! Plus I learned something new

[@bazpearce9993]

There's probably more people than ever before that "think" the Earth is flat.

[@lesmith939]

good stuff. a great presentation to describe a complex idea.

[@RoderickEmanuel]

Goody stock. Hey, man, sokker!

[@johnb6723]

In geolocation tracking, coarse geolocation is accurate to a nautical mile (a minute of latitude) and fine geolocation is accurate to 1/60 of a nautical mile (a second of latitude).

[@jim2376]

"A minute is a mile" is what I heard while sailing in the South Pacific. A nautical mile of latitude.

[@spanqueluv9er]

^arcminute ^arcsecond💩💩🤦‍♂️🤦‍♂️🤦‍♂️

[@MrPoornakumar]

@johnb6723 While learning "surveying" in college, we used a chain of 100 links & were told it is 101⅓ feet (30.8 meters) long. It is the length of 1 "arc second". When I find location of paces written in 0.01 Arc Second as extreme accurate, that translates to 1 foot (30 cm), it really makes me laugh. Do we put a "pin" on that spot? Is this accuracy necessary?

[@modalmixture]

You just helped me understand something I had always wondered about, which is why it took the Europeans so long to explore the western coast of Africa -- unlike the Americas, Africa was right there. The comment about the winds making littoral travel difficult, and the lack of navigation/cartography tech making open ocean travel difficult explains a lot. Then add in the Sahara desert making overland exploration difficult, and existing overland trade routes from Asia, and probably a bunch of other things a historian could explain.

[@Rack979]

For your next WTF is a [unit of measure] episode, I suggest the new (as of 2019) kilogram (which has a mass within a couple ppb of the previous kilogram). It's interesting how much cutting-edge science and technology makes an appearance in realizing the kilogram now. "Wait, it's quantum mechanics?" Yes, yes it is!

[@gaetanoroccuzzo]

​@repentandbelieveinJesusChrist1se cennt'anni vuoi campare, I to cazzi t'hai da fare

[@dylanst3802]

Video was so good I forgot it was about nautical miles till the end.

[@MrPoornakumar]

@dylanst3802 Thank God, you didn't miss nautical miles, after all.

[@Zkarimus]

Hey alittle bit of a correction or I suppose re-correction. At 4:35 you indeed said correctly the first time that the higher the Sun is at noon, the closer you are to the equator. However, the picture in question shows us position calculated by the angle of POLARIS over the horizon, also known as the North Star. Calculating your latitude from the Polaris would infact be the reverse compared to calculating the latitude from the Sun's position due to the fact that Polaris is almost perfectly aligned with Earth's Northern axis of rotation. As in, when the Polaris is closer to the horizon, the closer you are to the equator. Ofcourse you couldn't use this technique on the southern hemisphere of the Earth, as the Earth itself would block the star. This is why on the southern hemisphere, part from measuring your latitude in relation to the sun, you'd use the Southern Cross constallation, which is a little less convinient way of measuring the latitude, and needs more calculating whn the constallation isn't at it's highest point on the sky. Other than that little hitch, what an excellent video! :)

[@MrPoornakumar]

@Zkarimus Yes, you're right. "The higher the Sun is at noon, the closer you are to the equator" is a misstatement. It could be so on September 23 or March 21, only. On June 21 that means, you're on the tropic of Cancer, not the Equator.

[@cowebb2327]

Very interesting and informative. Would be very helpful to make captions available. Also, unless I missed it, you never say how many miles is a nautical miles, 1.15.

[@jameshorn270]

As a grad student in ancient history I encountered two Periploi (plural of periplus) which are accounts of the landmarks and ports on a sea route. These were the Periplus of the Euxine Sea (the Black Sea) and the Periplus of the Erythrean Sea (Red Sea) In addition, there is the Periplus of Pseudo Scylax which covers the Mediterranean and Black Seas. There are number of other periploi, including a couple from Carthage, which survive only as fragments quoted by later authors, such as Pliny the Elder. One of the most frustrating losses to history is the Periplus of Pytheas of Marseilles which covered the Atlantic coast of Spain, Gaul, and Southern Britain. It included a reference to the northernmost point he reached, known as Thule or Ultima Thule. It is not clear whether this was Scotland, the Netherlands, Denmark, or Norway. It is one of a dozen most missed lost works of antiquity.

[@rustyknott-W.D]

One minute of arc of latitude at the equator, or 6080.3 ft, depending on which spheroid you use. (2Pi x R)(Delta/360)To get knots, multiply miles by 1.1.

[@ArturHedlund]

Jumpcut 0:30

[@ricksanchez5474]

Jump scare

[@gljames24]

Possible ad cut.

[@erasin8844]

That ftl music in the background is bringing back so many memories.

[@BrixtonTone]

My brain now hurts but thanks for the lesson

[@NmpK24]

Columbus initially went west after convincing the Spanish monarchs it was an alternate route to India and China (for those spices), so they bankrolled his expedition. Not because he was discovering new lands for them. And that's why it's still called the 'West Indies'.

[@MrPoornakumar]

@NmpK24 But I think China was never in that picture (you must have added that, on a hunch). Till about 1100 AD, Europeans weren't even aware of China, though caravans ferried across Central Eurasia, goods & rats that infested Europe triggering "Great Plague". Alexander (the Great)'s world ended with India. His teacher, tutor & mentor, Aristotle was with him, to guide him.

[@Mr.Bonesz]

​@MrPoornakumar The Romans sent dignitaries to China. Europe knew, but it was a limited knowledge that was then further limited by the fall of Rome and the loss of half the Empire's accumulated knowledge give or take, with the other half in Constantinople.

[@SanctumMemem]

0:28 this cut is so violent 💀

[@CrizzyEyes]

People think that medieval working class food was bland -- and it was, to our palate. But local spices were available. Garlic was considered vulgar by the upper class at one point because it is so common. To them it was fine because palates are relative. Spices were just yet another way for rich people to show off.

[@MrPoornakumar]

@CrizzyEyes When the Ottoman Imperial duty, levied on Black pepper from Kochin & Calicut ports in India made black pepper cost its weight in gold, it made Chris Columbus sit up & think. His thinking (& knowledge of a Spherical Earth, differing from the then contemporary thinking, that Earth is a flat sheet; even now many Europeans swear by "Flat Earth") led to his effort to undertake the first European voyage across the breadth of Atlantic Ocean to "discovery of a Western sea-route to India" & discovery of Americas (instead), making all native Americans "Indians"! There can be no worse confusion than this for ostensibly knowledgeable people.

[@andresmartinezramos7513]

There are plenty of ways to season food with herbs from European plants. They just aren't on the very spicy part of the spices spectrum.

[@makManYt]

Wonderful video ! At minute 9:41 what 3d tool is are you using?

[@DavidFMayerPhD]

It is amazing that, despite the success of the "Metric System", the transport industry is STILL based on the nautical mile and the foot. No matter where you fly, your altitude is given in feet and distances are given in nautical miles. Eventually, this will change, but the process will take a huge amount of careful action.

[@kevinlytle6215]

A story well told! And I learned something! Nice!

[@longsleevethong1457]

This is just a small part of the knowledge you gain in captains school. It’s cool tho. Global navigation is quite interesting.

[@mattmorrisson9607]

what a fantastically explained video! I had no idea!

[@Jayrs13]

Excellent video

[@Uhaneole]

I like this as a former U.S. navy quartermaster (navigation for you land types), but also as a native Hawaiian, to show that while the Europeans were skirting the land, the Polynesians were masters of the pacific making it look like a puddle more than the largest expanse of the time.

[@andrewbocho3896]

So you were a storeman.

[@aaronarmstrong9776]

That's not what a quartermaster does. I've seen plenty of movies and I know that the quartermaster is someone who is friends with all of the main characters and sometimes his job is to argue with the captain. Thank you for your service, friend.

[@PaulRiley-ev9it]

I like the playfulness of this conversation; so the quartermaster gets to control the goods and the Bond, whilst navigating the ship!@@aaronarmstrong9776

[@13Voodoobilly69]

Quartermaster, is that the guy who sits and shouts out the numbers he reads off of the garmin?

[@ThreeSeatStarboard]

I’m the quartermaster for my son’s baseball little league. It’s my job to make sure none of the uniforms fit properly. I’ve been told this is broadly in line with Navy standard operations.

[@abramswee]

today i learnt something new. Thanks for sharing

[@DiscipleDojo]

Well done, guys. You just earned a sub. If DiscipeDojo had half your editing skills our channel would have exponentially more subscribers. :)

[@brandonwilson5898]

You know I liked this channel and it's content. All the way until I saw this video. Journalism has been replaced with propaganda!

[@laurieandrus1430]

This was absolutely great, you got a new sub

[@ellstripe5185]

FAVORITE VIDEO IN SO LONG, Learning can actually be fun

[@rainingfallout3043]

what a underrated channel

[@ritchie9030]

Great graphics, bong toke descriptions.

[@jamesbevan9989]

And the 1/60 of a degree is why knots are measured in time. There are 60 minutes in a degree and 60 second in a minte and we measure the length of travel by measuring the time and speed using a log line that was a rope with knots tied in it at certain intervals. It was dropped with a wood end for drag and as it was released behind the ship the number of knots on the line that fed out where counted over a specific time which gaveyour speed in knots. And with the knot speed known you could use that speed with the time and know your distance traveled and thats why a latitude line was one degree, and that degree is 60 minutes and broke down to a smaller measurement of 60 seconds. The reason it was broken down from the 360 to the 1/60th is because of 60 minutes in an hour and the earth rotating at 24hours. So lat and long is measured in degrees minutes and seconds. So if you go north at 15 knots you will go one degree in 4 hours. And if you go 15 knots in say 1 hour and 15 seconds you can narrow that down to a specific point. Measurement on a nautical chart is only made using latitude lined because the degrees stay at a constant where longitude line degrees get smaller from the equator the further north or south you go.

[@IcyDiamondDust]

This channel is going to become massive.

[@samuelgarrod8327]

Still waiting...

[@Bach_Treebane]

I once worked at a subway and a got prank called. I went along with it. They asked how long was our footlongs... i responded in inches, feet, millimeters, lightyears, and nuatical miles. 😂

[@MrPoornakumar]

@Bach_Treebane There are plenty of empty brains, idling for want of work, in this world ! This is the height of inventiveness. Do you what is "height of unemployment"? (I wouldn't tell that, there are ladies around)

[@axb6061]

Just found this channel. You are you that are so wise in the ways of science?

[@TheGahta]

No idea how you got into my recommendations, but i like the style 😊

[@joeyspears2759]

I'd love to know understand the algorithm bro I think it's a wizard it s took shed or something

[@mwd0884]

4:32 great video but in this section you keep saying you can measure the sun, but didn't they use other stars in the night sky? for example, the graphic you're pointing to says polaris, not the sun.

[@w.reidripley1968]

That they did. They used observations both of local noon and of the moons of Jupiter to set their chronometers to find accurate longitudes. They needed a set of two clocks for the job: one kept on Greenwich time, and the other reset for observed local noon, using a sextant to find the exact moment the sun was highest right there. This led to the curious naval, and navigational, habit of figuring each calendar day noon-to-noon rather than the landlubber midnight to midnight. With sextant and clock, they knew for sure what bloody time it was.

[@yzhassan2606]

found this channel today! subscribed and turned on notifications!

[@ZedNinetySix_]

WTF!? Your channel carries itself like it has at least 2 million subs, but you dont even have 7000 yet!? Lets fix this now!❤

[@stevejohnson3357]

The comedian Charles Haycock covered this in 1 of his routines. "You idiot, the Earth is a rhombus and you still work in the warehouse."

[@toomanylies7716]

This was fun and informative. Thanks!

[@MrRomanpa]

Great explanation, thanks. PS maps are used for land,charts are used for water.

[@d_shepperd]

Great detail. Excellent job. But as usual, it leads to more questions. As in how a nautical mile relates to a knot (as in doing 5 knots). And did the distance of a knot differ in the old days to what it does now and how does iit match up to a nautical mile these days or are they completely separate?

[@MS-qx9uw]

A knot isn’t a unit of distance, it’s a unit of speed defined as 1 nautical mile per hour

[@melody3741]

@@MS-qx9uwand a nautical mile is…. Distance

[@MS-qx9uw]

@@melody3741 yes

[@larryscott3982]

They’re called knots because sailors used a rope with knots tied in it, and attached to a small plank. The distance between knots was a careful specification as was the shape and size of the wood plank attached. It was thrown overboard and the knots that were dragged out were counted for 28 seconds by a sand glass. And that was developed to approximate the distance per hour at 6080 ft per nautical mile. And more unit confusion: the distance between knots in the rope was 8 fathoms.

[@d_shepperd]

@@larryscott3982 That is basically what I was trying to clarify. Since the space between the knots on the rope is a distance that was guesstimated to relate to the distance of a nautical mile (or is that an error?) and now we have a different number for the length of a nautical mile to when "knots" was invented, what does that do to the meaning of knots of speed? I.e. if one were to travel for 1 hour at 100 knots, how much distance was actually covered? 100 nautical miles or just something close to it? Or am I just confusing the notion of knots reflecting nautical miles covered per unit time? Maybe I should stick to measuring my velocity in kph and distance traveled in miles or visa- ersa.

[@JaysSavvy]

My man, you left some stuff out. 1. A nautical mile is about 2000 yards or 6000 feet. 2. A "Knot" is a measurement of speed, was based on the 2000 yard/6000ft nautical mile. 3. How a "knot" came to be a measurement of speed. 4. Understanding dead reckoning (Time/Speed/Distance).

[@332mm]

Great video. I went to sea in 1970 and we used sextants and tables to navigate. Retired from USN in 1999 …. The Industrial Revolution of 1830/1840 was nothing compared to the scientific advances of my lifetime.

[@nozrep]

yes thank you for delivering that from your mouth to my brain as the guy in background said at the end, whoever that guy is

[@lamorte42]

I've read the Apollo missions used three different measurement systems. Imperial for launch operations, Nautical for the trip to the moon and orbital operations, and metric for the lunar surface.

[@larryscott3982]

Which goes to show why a Mars probe crashed when an oopsy of pounds seconds used in some calculations instead of Newton seconds.

[@lookoutforchris]

No one in the US has ever used the Imperial system. It was created by an act of Parliament in 1820s… British Parliament. 1820s… get it? Decades after the US gained independence. The Imperial System is foreign to the US and is not compatible. What you mean to say is US Customary.

[@larryscott3982]

The US is still deeply attached to: Pounds, ounces Gallons, pints, quarts, ounces Feet, inches, fraction inches, yard Acres Miles, MPH Fahrenheit Inches Hg, PSI Are these imperial units? Liter is getting used more because beverage companies not law.

[@ThatGuyBrian]

@@larryscott3982 There are slight differences between certain units in the Imperial system and the Customary system, though. Primarily when it comes to volume.

[@guylavoie1342]

Yes, that came about because when the British reformed the volume units around the year 1800, the US was still angry at Britain (1776 anyone?) and never adopted the changes. The reformed units are the "imperial" units (eg: the imperial gallon is 4.54 liters, while the "US" gallon is 3.78 liters).

[@HECTORBIDO]

Great stuff. Excellent content

[@jezza88888]

I love you legitimately surprised you were to see the phoenecian trade routes, oscar here you come. 🎉🎉🎉🎉

[@buffaloshite]

1.5 mins into this video and it's really visually engaging and edifying - Thanks!

[@Aaron-s7t7q]

Outstanding title for the video👍

[@Nikioko]

A nautical mile is an arc minute on the equator. 40.000 km / 21.600 = 1,852 km

[@BrentWalker999]

Arc minute?

[@Nikioko]

@@BrentWalker999 Yes. A full circle has 360 degrees. One degree has 60 minutes, and one minute has 60 seconds. A parsec is the distance of a star with a parallax of 1 arc second.

[@kevinrogan9871]

You beat me to it. Dividing 66.66 miles by 60 was not to make a nautical mile more convenient but to convert to the distance subtended by an arc minute at the surface of the earth as you rightly point out

[@freebornjohn2687]

I'm guessing but one reason why the Brits were late taking up the French definition was that the Royal Navy had mapped and produced some of the best maps and they had worked very well.

[@Anastas1786]

Not gonna lie, "Willebrord Snellius" sounds like the name of the rich, snooty bad guy trying to stop the princess from falling in love with our hunky peasant hero guy.

[@markusfassbinder8275]

did I hear the sounds the boats make in anno? nice! Also good choice of music!

[@George.Andrews.]

A knot or nautical mile is one minute of arc from pole to pole. Pole to pole = 180 degrees. 180 ×60= 10,800 10,800 nautical miles from pole to pole . One NM has been standardised to 1,852 metres.

[@kraddonn]

Can someone please tell me whats the name of the song with the guitars and violins?!?!? Near the beginning, its so familiar yet I have no idea where I've heard it!!!

[@Freedom4Ever420]

I had USA textbooks from the 90’s that all gave different values for how many feet were in a NM. Because earth is an oblique spheroid, the actual value changes a few feet based on latitude I’ve never heard the term “regular mile”, do you mean statute mile?

[@jakubmech7410]

I love the second person in the background because it feels way more human, like that random ass deep scientific convo between the boys at 11:43pm on a saturday

[@mattvjmeasures]

Great upload, thanks. Very much related: I recommend the book "Longitude" by Dava Sobel. It's a great, brief, fascinating history tale primarily about the tricky issue of determining latitude at sea

[@kleinjahr]

No, it's about the difficulty of finding your longitude at sea. Latitude is how far north or south you've gone, longitude is how far west or east you've gone.

[@joeyspears2759]

There's a video by a couple Englishman called, map men longitude, it explains in a concise easy to understand way not a shill just trying to be helpful I'ma a Kentucky hillbilly and I understand it lol. This video here is really to glad I found it

[@freq500]

​@kleinjahr Having accurate clocks on ships solved the problem. Of course the technology took time to develop. Pardon the pun