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.
@JoelSperanzaMathАй бұрын
Stay in school kids.
@marcg1686Ай бұрын
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.
@dadtype23394 жыл бұрын
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!
@nicolaimartin38034 жыл бұрын
Nope. Video image is just displayed backwards :-)
@redshield32964 жыл бұрын
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.
@T7oo2 жыл бұрын
exactly my thinking, what if I have slow boat, and I travel 1min and not pass 1852m :D
@prototype212 жыл бұрын
@@T7oo What if I sailed north but the winds were strong and I actually ended up further south?
@YorranKlees5 жыл бұрын
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 !
@computersstudyroom94973 жыл бұрын
U are writing on screen backward wow and mind-blowing clearity ,very nice video love from india
@AJ_235103 жыл бұрын
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!
@asmillingchihuahua98585 жыл бұрын
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!
@dylanevans75294 жыл бұрын
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?
@sarujanrupan48312 жыл бұрын
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.
@archermcbeth11623 жыл бұрын
Thank you👍😀
@888berg2 жыл бұрын
Awesome job, just wondering how you filmed this.. did you write backwards? Cheers Mate :)
@jonsimon92474 жыл бұрын
Great description and instruction! Very easy to understand! Thank you!
@karlahoward32065 жыл бұрын
Thank you for making it clear.
@anshgandhi81632 жыл бұрын
thank you for clearing this topic of mine...are really amazed by how you can write backwards👌👌
@waylonkurts3938 Жыл бұрын
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.
@chrisbrown61685 жыл бұрын
The fact he could write in reverse so quickly was impressive
@Lowpropo4 жыл бұрын
e probably flipped the video after
@KarthikHebbar964 жыл бұрын
@@Lowpropo which means he is a left hand writer.
@joegml56592 жыл бұрын
Lol
@pesology8158 Жыл бұрын
No he is writing on a glass... it's a trick most of the online teacher does
@appleyes411 Жыл бұрын
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?
@Miguelascencio19965 жыл бұрын
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.
@MikeGreenwood515 жыл бұрын
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%).
@sheldonmcpherson27003 жыл бұрын
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
@vigilantevasco37693 жыл бұрын
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
@3dyour2a592 жыл бұрын
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?
@sarujanrupan48312 жыл бұрын
I understand this now thank you.
@gurharsh17 жыл бұрын
So you have learnt to mirror-write?
@hectorstable6 жыл бұрын
Presumably he's left handed, and inverts the video. His lady-buttoned shirt would evidence that.
@fridolinstraubinger28336 жыл бұрын
@@hectorstable or he mirroed the video
@hectorstable6 жыл бұрын
That's what I said.
@ronanrogers41275 жыл бұрын
hectorstable ...no, you said he has inverted the video. That’s not the same as mirroring the video
@bishhsasspusi29044 жыл бұрын
@@hectorstable lefthanded?
@joshuabudiarto50364 жыл бұрын
Won’t one minute of distance be different depending on the speed
@ChristianMcLeodphoto4 жыл бұрын
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.
@shaniannajones4 жыл бұрын
Why is he comparing degrees to seconds and miles to km. His explanation is already confusing enough
@RC-bl2pm3 жыл бұрын
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.
@alanwood49686 ай бұрын
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.
@9LimaAlpha72 жыл бұрын
2:20 if you go north or south as you said one minute, but at which speed or velocity would you travel at??
@gurharsh17 жыл бұрын
Thank You Joel.
@williamkilmore25564 жыл бұрын
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! !
@GZA0362 жыл бұрын
The lines of latitude dont suddenly change when you reach land, you idiot.
@iadrian75696 жыл бұрын
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?
@MikeGreenwood515 жыл бұрын
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.
@BuruhanLipela-jq8fe Жыл бұрын
Good
@enrique79193 жыл бұрын
If you go north 1min is a nautical mi how fast 💨 would that be ?
@frankc36352 жыл бұрын
1 minute at what speed?
@rafi626053 жыл бұрын
Is 1 min equal to of the degrees out of the 90?
@jairrivera92942 жыл бұрын
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
@JoelSperanzaMath2 жыл бұрын
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.
@tsvmanojturlapati44923 жыл бұрын
Thank You.
@JoelSperanzaMath3 жыл бұрын
You're very welcome
@user-mt3vk3xw2l Жыл бұрын
Why nautical mile is longer at poles than at equator?
@entangledmindcells9359 Жыл бұрын
It's not
@spychiatrist30453 жыл бұрын
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.
@JoelSperanzaMath3 жыл бұрын
I think you were right the first time. I'm writing on what is essentially a window.
@spychiatrist30453 жыл бұрын
@@JoelSperanzaMath Whoa.. backwards too?
@firebomb55104 жыл бұрын
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 👍
@Gazb_fpv4 жыл бұрын
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_Jedi4 жыл бұрын
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.
@princeoghene.16982 жыл бұрын
It's very educative and interesting. What's Facebook name, pls?
@muhammadhashim732 жыл бұрын
As far I know, 1 Nautical Mile is, 1' longitude, not latitude(You mentioned in the video)
@RB747domme5 жыл бұрын
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.
@appleyes411 Жыл бұрын
Could you also check how we got the distance of Earth to Mars and also the sun?
@marcg1686 Жыл бұрын
Oh look, a mindless flattard smearing himself across the comments section.
@sarahabraham80767 жыл бұрын
thank youuu
@asmith88963 жыл бұрын
60 minutes for every one degree.
@joeferperez83724 жыл бұрын
igcfi
@samgu6195 жыл бұрын
You are basically Coldplay, but writing.
@HarrisFamilyKids4 жыл бұрын
sam what does this mean? its keeping me up at night.
@stonefaceBRC3 жыл бұрын
@@HarrisFamilyKids You know. Coldplay. The band? Hope this helped!
@migmigjohnson60832 жыл бұрын
What do Flat Earthers have to say about all this?
@sundarmurugan50754 жыл бұрын
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.
@JoelSperanzaMath4 жыл бұрын
Sorry Sundar... there are minutes (Like time) and arc minutes (60 minutes in 1 degree). They are not related.
@sundarmurugan50754 жыл бұрын
@@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.