This video explains the definition of a nautical mile and a knot.

Thanks Dr.Math for explaining this so well and in an easy way.

Best explanation I could find, thanks for putting out high quality content

Very informative. Thank you.

I knew it was almost the same as a mile but I forgot. But I never knew where it came from. This helps. actually quite elegant reason for the nautical mile.

Very nicely explained sir about nautical mile and a knot👌

I wish I could like this video twice

Nice explanation

That's a great video thanks. I came to watch this after researching how 1 metre is defined. It originates from - The total metres from the north pole to the equator = 10,000,000 metres. 1 nautical mile is 1 minute, which in km is calculated as 10,000,000 / 90 (for 1 degree) / 60 (for 1 minute) = 1,851.85 metres, the same as in your video!

Great explanation, very clear and easy to understand!

thanks

Thanks for sharing!!

For those who are confused when he says “minutes” he does not mean time, he is referring to the distance in between the minutes on a clock ⏰

I've always wondered what this was about and you cleared it all up -- very clearly. Thanks!

Well explained Kumar!

Respect for including imperial measurements for us old (Western) guys 😂

Very good . Thank you .

Great writing with your mouse!

Best and Easiest of ALL of the vid options. Illustration in 2D is super easy to understand. Quick, Easy, Succinct, for metric or imperial system users. One question, were you referring to the lines of *longitude* as lines of *latitude* accidentally? Given it's a globe, it's the same angle regardless though correct?

Great job.

Great explanation, It was easy to understand

Well said! And your “writing” w/a mouse is 👌🏽!

That was a good explanation. thanx.

Thanks a lot about this really clear explanation 😁

Well explained

So nautical mile changes from eqator region to poles

I'm really having trouble with this. The last guy said 1 Nm is equal to 1 minute of degree based on the circumference of the earth at the equator. Your saying it's based on 1 minute along a line of longitude. But your distances would not be uniform due to the Earth being an oblate sphere. In other words, a Nm closer to the poles would be longer than a Nm in the tropics. This is because, due to the oblate shape, the radius of a certain arc increases as we approach the poles and decreases as we approach the equator. Hence the distance of one minute is longer relative to the longer radius of that certain arc that is closer to the poles. OK, that's it, I'm going to bed before I launch my turret like a T72.

@2:12 thanks

way cant we use this on land?

Thank you soooooo much :) Very good explanation. Thanks

Thank you 😊

I thought 1 degree have 4 mins.

If nautical mile is 1 degree of Latitude, what if I travel multiple Latitudes (west to east per reference)?

What if you are traveling East-west around the North Pole? Are you going 0knots or 1,000,000 knots?

So, that means it's only 5400 Nautical Mile from the equator to the North Pole?

very well done!

Good video. But how about for navigational purposes, can you describe seconds and how they are used?

if my mom was traveling at 6KM along the equator going east and your mom was traveling 19.6 MPH along the border going west and both started in Quito Ecuador, what is the coordinates of their meeting place?? AND what would be the speed of their friend traveling due south from the North Pole if she was to arrive 1.25 hour later at the same meeting point.???? Go for that one mr Brainiack!!!!

Why nautical mile length is longer at poles than at equator?

1:15 y is 1 deg = 60mins ?? how was the time calculated to be 60mins ??

According to this we only measure north south distance... What about east west distance.... How we calculate one minute?

Ths

Why is 1 degree, 60 minutes?

Arc minute

Is this only in longitude? not horizontal?

What is wrong if we specify distance in kilometer or mile as we do on land?

wont the latitude change as we go up so how will nautical mile remain same?

Longitude, not latitude.