The Nautical mile - What is it?

[@dugistefanic611]

As soon as you drew the globe you got it wrong. A nautical mile is one minute of ELEVATION ANGLE of Polaris (1 degree = 60 NM) and elevation angles consist of 2 STRAIGHT lines, a horizontal plane, and a line of sight to Polaris. Earth is flat..every navigator who understands how sextant works knows that.

[@JoelSperanzaMath]

Stay in school kids.

[@marcg1686]

Mindless garbage. Polaris has never had a declination of 90.0°. At the time Richard Norwood and others were refining the nautical mile, Polaris was more than 3° from 90°. Feckless simpleton.

[@redshield3296]

I think he should’ve explained that one minute is not a unit of time. Some people maybe gotten confused when he said, sail for one minute. There 60 that’s in 1° And 60 seconds within those degrees.

[@T7oo]

exactly my thinking, what if I have slow boat, and I travel 1min and not pass 1852m :D

[@prototype21]

@@T7oo What if I sailed north but the winds were strong and I actually ended up further south?

[@dadtype2339]

Thank you for the video, but I'd like to point out to folks, with all he said aside,,and unless he is doing this another way, but,,,,,uhm, he's writing backwards and in reverse pretty damn quick! Very cool and nice job!

[@nicolaimartin3803]

Nope. Video image is just displayed backwards :-)

[@YorranKlees]

Did you backflip the video afterwards, or can you write in reverse ? Because that was seriously impressive if you can. Besides that point, thank you for the definitive good way to explain how nautical miles work !

[@computersstudyroom9497]

U are writing on screen backward wow and mind-blowing clearity ,very nice video love from india

[@AJ_23510]

Im trying to understand if you are writing backwards on a transparent board or I you are using a mirror to somehow film.... If you are writing backwards, then that is some impressive stuff man!

[@waylonkurts3938]

Since the nautical mile is based on the length of an arc at sea level, would the metric equivalent of 1 nautical mile be greater than 1852m while traveling at some height above sea level? I'm thinking that the instruments on aircraft must factor for this using a barometer, so that they can exchange accurate information with surface vessels.

[@dylanevans7529]

I keep getting lost, if is 1 minute of an angle of latitude, doesn't that make it relative? how is it a constant 1.15 miles?

[@sarujanrupan4831]

If you think about it, on a globe the latitude lines stay the same distance apart (1 degree/ 60 minutes apart) so that means if you drew a line every 1 minute they would also be equally spaced out.

[@geredthompson7760]

Crazy how well u wrote backwards

[@888berg]

Awesome job, just wondering how you filmed this.. did you write backwards? Cheers Mate :)

[@alanwood4968]

Thats the reason people stick to miles per hour and its near enough doesnt rquire to be exact. but divide natical miles by 896 is good enough.

[@asmillingchihuahua9858]

Wow thanks man, i was just wondering what a nautical mile was and you were the first video i saw and it was great thank you!

[@appleyes411]

Do you use nautical miles for making bridges and pavements? Can you try to see if a distance change across two buildings base and top at 30 to 50 miles?

[@9LimaAlpha7]

2:20 if you go north or south as you said one minute, but at which speed or velocity would you travel at??

[@Miguelascencio1996]

Is a nautical mile basically the 'correct' way of saying miles? For example would it be correct to say "I'm driving at 60 nautical miles/hour" or is it different? Thank you.

[@MikeGreenwood51]

It is different. 1 mile (Or 1 land mile) = 1,609Kms. So a mile is shorter than one nautical mile (1,852 - 1,609 = 203meters) by 203 meters (13.12%).

[@gurharsh1]

So you have learnt to mirror-write?

[@hectorstable]

Presumably he's left handed, and inverts the video. His lady-buttoned shirt would evidence that.

[@fridolinstraubinger2833]

@@hectorstable or he mirroed the video

[@hectorstable]

That's what I said.

[@ronanrogers4127]

hectorstable ...no, you said he has inverted the video. That’s not the same as mirroring the video

[@bishhsasspusi2904]

@@hectorstable lefthanded?

[@karlahoward3206]

Thank you for making it clear.

[@jonsimon9247]

Great description and instruction! Very easy to understand! Thank you!

[@chrisbrown6168]

The fact he could write in reverse so quickly was impressive

[@Lowpropo]

e probably flipped the video after

[@KarthikHebbar96]

@@Lowpropo which means he is a left hand writer.

[@joegml5659]

Lol

[@pesology8158]

No he is writing on a glass... it's a trick most of the online teacher does

[@sheldonmcpherson2700]

Doesn’t speed effect what if you travel North moving at 3.2 km double km in one 1kt you would mathematically get there in half the time 30sec rather then 1 min. So in your example the traveller going north is moving at 1.8km for 1 min is =1kt . Am I missing something why is it 1kt just because it’s 1 min up the lateral axis it must depend on how fast you are moving

[@vigilantevasco3769]

1 minute is not a unit of time. Each degree is split into 60 "minutes" but a minute is a measurement of distance not time

[@rafi62605]

Is 1 min equal to of the degrees out of the 90?

[@jairrivera9294]

If a boat travels faster in 1 minute north than another boat would their definition of the length of a nautical mile be different? For example boat A travels 4 meters per second and boat B travels 2 meters per second. Can their nautical miles be different lengths? Idk if im making any sense here

[@JoelSperanzaMath]

You might want to watch the video again and pay attention to the bit where I define the word "minute". In this case, minute is not a unit of time, it's an angular measure.

[@anshgandhi8163]

thank you for clearing this topic of mine...are really amazed by how you can write backwards👌👌

[@princeoghene.1698]

It's very educative and interesting. What's Facebook name, pls?

[@3dyour2a59]

I'm lost. Traveled one minute north is equal to a notical mile? No matter how fast you were going?! So If I travel north 1 minute while going 60mph that's one nautical mile & also if I travel north 1 minute going .5mph it's also equal to one nautical mile?

[@joshuabudiarto5036]

Won’t one minute of distance be different depending on the speed

[@ChristianMcLeodphoto]

No. It’s not a minute of Time, it’s 1 minute of Degrees. It’s a measurement of degrees. 1 degree is broken up into 60 minutes.

[@shaniannajones]

Why is he comparing degrees to seconds and miles to km. His explanation is already confusing enough

[@RC-bl2pm]

It's the grade 5 geometry. Angles are measured in units of a degree. The degree is subdivided into the subunit "minute". The minute in turn is divided into the second. 1 degree=60 minutes=3600 seconds.

[@appleyes411]

Could you also check how we got the distance of Earth to Mars and also the sun?

[@marcg1686]

Oh look, a mindless flattard smearing himself across the comments section.

[@muhammadhashim73]

As far I know, 1 Nautical Mile is, 1' longitude, not latitude(You mentioned in the video)

[@enrique7919]

If you go north 1min is a nautical mi how fast 💨 would that be ?

[@user-mt3vk3xw2l]

Why nautical mile is longer at poles than at equator?

[@entangledmindcells9359]

It's not

[@sarujanrupan4831]

I understand this now thank you.

[@archermcbeth1162]

Thank you👍😀

[@spychiatrist3045]

For a minute there, I thought you were drawing through a clear "whiteboard" of some kind, but you must be drawing on a mirror like surface, filming it from in front of you and then reversing the image.

[@JoelSperanzaMath]

I think you were right the first time. I'm writing on what is essentially a window.

[@spychiatrist3045]

@@JoelSperanzaMath Whoa.. backwards too?

[@firebomb5510]

So because 1 mile =1852 meters...is because of the rolling effect while in the water. Water being slower to travel when measured in ancient times by "Hour Glass"(of course each sand glass would have been set up through trial and error before a sextant utilized for measurements). Of cours,they were rowing and using sails,by measurements of wind,etc. Undeestood 👍

[@williamkilmore2556]

While researching the Flat Earth phenomenon, I've watched and read many texts to prove or disprove the 'shape' of the Earth. As I understand by this video, a nautical mile is based upon the Earth being a sphere. ie" arc minutes of curvature, My question is this: Since the Earth is a globe/Sphere for both water and land, Why is there a difference between Land and Water distances? The one arc minute only applies to water? Totally ridiculous! !

[@GZA036]

The lines of latitude dont suddenly change when you reach land, you idiot.

[@Gazb_fpv]

Ok im trying to understand this that if I sail a ship nth for one minute il travel 1.8xx km? But what it i was travelling at a higher speed? Would I not travel more than 1.8xx km or 1 nautical mile?

[@The_Touring_Jedi]

To reach 1 nautical miles depends on boat speed. We need time from point A to point B on a sea to measure nautical mile. So if the boat reaches let's say constant speed of 20 knots( NM) then you will cross the distance of 20 NM (37km) in 60 min. So 20 knots speed is 37km/h on a water.

[@frankc3635]

1 minute at what speed?

[@gurharsh1]

Thank You Joel.

[@RB747domme]

He missed out the important bit, about how early sailors worked out the mean radius of the Earth, and therefore the ability to use trigonometry and pi in order to work out the length of a minute.

[@iadrian7569]

Doesn’t nautical mile depend how fast you travel? So how fast do you have to go to reach a nautical mile and how long will it take?

[@MikeGreenwood51]

You need to travel as fast as the earth rotates. As there are 60 minutes in an hour and 1 hour of arc = 15 degrees. The speed of travel would need to be 15° per hour. Or 360° (Around the earth) per 24 hours (per day). So travelling due west you would arrive just inside the Polish west border one hour (15°s) after setting off from the Milenium Dome, London. Approximately 647.19 miles an hour (1,041.56Kms/p/h). At sea level give or take a few ups and downs. At 1,000m altitude or 10,000meters the land milage would be greater. But the nautical milage would be the same. So a nautical mile does not depend how fast you travel. As a nautical mile is a measure of distance. So likewise the measure of distance does not depend on how fast you travel. So if I travel a measure of distance in a hot air balloon or in a jet aircraft, I would still have travelled the measured distance. Speed (how fast you travel) would just shorten or lengthen the time. So if you review the video and observe the teacher's teachings; he explains there is time involved ( 1 minute). So time is already factored in. So if I fired a hyperthetical rocket straight-up from the Milenium Dome at 0°E/W 51.30N at a thousand miles an hour and it reached the same coordinates 10 miles up in 10.6 minutes. It would have traveled zero nautical miles. So if you draw two straight lines forming a sharp acute angle of 1° then as the lines get further from point A (A = Angle where the lines meet) the distance of the length of a third line (third line forming a triangle) increases the further it is from 'A'. Yet the angle remains 1°. So if the side opposite 'A' is 1 mile, 10 mile or a 1,000miles the distance would still be 1°. A nautical mile is relative to 1 minute. (15° =60minutes, 1° = 4 minutes). So 1 minute = a quarter of a degree of arc. At 5cms from point 'A' a snail could slither the distance in about 5 seconds where as the International Space Station travelling at an average 17,227mph at an altitute of 205 to 255 miles above earths surface would require (92.68 minutes per 360 degrees) 2.574 minutes (177.4 seconds) to travel 36° 4.92 seconds per degree therefore 1.23 seconds to travel 1 minute or 1 nautical mile at ground/sea level. As long as you pushed the snail across the finish line to make sure the snail wasn't stopping for tea or taking a detor.

[@tsvmanojturlapati4492]

Thank You.

[@JoelSperanzaMath]

You're very welcome

[@BuruhanLipela-jq8fe]

Good

[@asmith8896]

60 minutes for every one degree.

[@samgu619]

You are basically Coldplay, but writing.

[@HarrisFamilyKids]

sam what does this mean? its keeping me up at night.

[@stonefaceBRC]

@@HarrisFamilyKids You know. Coldplay. The band? Hope this helped!

[@migmigjohnson6083]

What do Flat Earthers have to say about all this?

[@sarahabraham8076]

thank youuu

[@Hairysteed]

Just here for the flat earth comments

[@colmanian]

I thought you said sailors / PIRATES whatever 😂

[@sundarmurugan5075]

According to Joel, 1 degree = 60 minutes ( 1 hour)= 60 nautical miles ( Because he said 1 minute = 1 nautical mile). If it is correct then calculating the circumference of the Earth will be easy as following, Circumference = 24 (hours) x 60 (60 nautical miles)= 1440 nautical miles (2666 km). Is our Earth bigger than our moon???? one more, According to him, 1 degree = 60 minutes ( 1 hour). So we might have had 360 hours a day or our Earth must be sized as a 24 degree pie. Kindly unlearn it man.

[@JoelSperanzaMath]

Sorry Sundar... there are minutes (Like time) and arc minutes (60 minutes in 1 degree). They are not related.

[@sundarmurugan5075]

@@JoelSperanzaMath Sorry Joel... I think I was wrong. Knowing nothing about arc minute, I should not have commented on this. I completely withdraw my words. Thanks for your reply.

[@joeferperez8372]

igcfi

[@aravindssingapore4327]

Nautical mile=naughty-cool smile