Global Compass - how do they work

[@stpetie7686]

Every video I think to myself, "Man I'm glad I found this channel".

[@mrparlanejxtra]

What a wonderful world, ooooohhhh yeeeeeaaaaahhh

[@nikob5899]

That's a lovely comment!❤

[@IOSALive]

The Map Reading Company, Wow, this made my day brighter! Thank you!

[@PhilWaud]

That is fascinating, again you teach us about something that we knew nothing about and keep our attention because its so well presented. Thank you.

[@squarehead560]

Brilliant, educational and enjoyable to watch. Thank you. If the difference is only the pointer separated from the magnet from product manufacturing perspective, why brands not make global compasses the standard product, rather than charging so much higher prices for these compared to the hemispherical ones.(Btw pls do explain quantum electro dynamics…!)

[@sidensvans67]

Interesting . Very well presented . I learned something today . Good Job .

[@matthewsheeran]

I have a good quality "global" compass with inclinometer. It's only plastic but is a good one which cost me over $100. Most compasses are indeed region specific and don't work very well in such circumstances.

[@justindawson3428]

I have learnt a few things from this video and for once it was not from your rambles LOL, Thank you for these videos. What is the best way to ask you questions?

[@TheMapReadingCompany]

Channel members can ask as many questions as they want on the community page - so if you would like to join that would be great 😊 kzbin.info/door/F6JMjE4LM3nuWhaiLjLuOQjoin Or just ask here (not everyone can afford to join a KZbin channel) and if I have time I'll try and answer.

[@Drpiwi]

How does that differ from an oil filled compass?

[@IOSALive]

The Map Reading Company, You're amazing! Let's be friends and have fun together!

[@nikob5899]

😂❤

[@RegebroRepairs]

Well, obviously the correct answer is "Silva", I'm Swedish after all, and hey, looking at their website I just realized that the thumbnail is indeed a Silva. So... 😀

[@MDyna32]

Silva compasses haven't been manufactured in Sweden for nearly 20 years now. Silva is now just a small design team that sends product specs to a Chinese production factory

[@worthlessendeavors]

Some people are born to teach. I’m grateful to encounter them.

[@glyngibbs9489]

Excellent as usual, thanks. Can't wait for the quantum electrodynamics talk. Best teacher I ever had.

[@nikob5899]

❤

[@barnyWRX]

Completely not what I expected the difference to be. Many thanks for the explanation.

[@RogerBays]

I live in New Zealand and it is very difficult to find a compass where the southern end of the pointer doesn't scrape. Even proper outdoor shops frequently sell compasses that have been balanced for the northern hemisphere (with a northern hemisphere DIP angle). When I try to tell them they look at me like I come from Mars. I go back to the shop a year later and they are still selling them. Using a compass with the wrong dip angle is incredibly annoying because you always have to monitor if it is scraping and thereby giving you a false bearing. Enjoy your videos, any chance of one about the wonderful, but now discontinued, Silva 54 with the miniature sighting prism built into the housing. I used one in Antarctica to sight in a row of glacio poles, on a bearing. We swore that with care you could sight to 1/3 of a degree. Cheers.

[@causewaykayak]

There's a good reason folk are working in shops. Shop assistants are notoriously bad listeners and basically slaves to proprietor's directives. They just want to shift stock.

[@markbernier8434]

Go to a ships chandler and try there. Ships of course, go everywhere and move about doing it.

[@causewaykayak]

@@markbernier8434 Quite right. Compasses are swung regularly and larger ports will have agents equipped to do the job. Most modern small boat compasses are fluid mounted globes rather than cards or needles.

[@RegebroRepairs]

The Silva Expedition S has a sighting mirror, which is supposed to do the same thing. I haven't used either, so I don't know, though. But Silva Expeditions is what we always used when orienteering in school.

[@joenicotera2991]

I've had quite a few different compasses over the years...but if you really want accuracy in a small package I bought a sighting compass made by Suunto. I know most compasses have the sighting feature but this one was different...The factory specs were different too. The factory claimed accuracy 1/3 of a degree. I bought it for doing rough survey work...the price wasn't all too bad...i wasn't expecting it to replace a transit...but it usually did. Suunto KB-14/360R OH, AND IT SAYS GLOBAL ON THE DIAL. WHAT YOU CAN'T SEE IN THE FACTORY PHOTO IS THE VIEW INSIDE THE SIGHT WINDOW...HOW YOU USE IT IS KEEP BOTH EYES OPEN.

[@givemespace2742]

I have always been amused that the North magnetic pole is a south magnetic pole and visa versa.

[@davehumpleby3440]

I never knew that. Every day's a school day. Thanks.

[@07HDFatboy]

Thank you. Was in the US Army did land navigation, but never was taught about that.

[@michaelperine2333]

I started using a compass when I was a Boy Scout more than seventy years ago. I don't hold the compass flat (or horizontal). I hold it so that the needle moves freely. On rough terrain, what looks like flat may not be.

[@nozrep]

i have never needed a compass cuz I’m a city boy, haha, and I stumbled on this video randomly. And well, shoot! Heck! I think I’d almost just as soon purchase a high quality global compass and spend the money once. And keep it like a piece of jewelry or something. Haha. Even though I’ve no plans to go from America to Tierra del Fuego any time soon. Anyways, so cool! I learned a thing!

[@jasont80]

I like the little spherical compass that is suspended in liquid.

[@barrydonaldson]

Excellent! It's amazing how little info there is on the detail of how our compasses work. Even from the manufacturerers! This channel ROCKS my nerdy World! 🤘🤘

[@mojeimja]

Why people dont just titlt compass a little to avoid needle touching? Thats a solution.

[@MDyna32]

only a few compasses with a top hat needle design can still give an accurate reading with the base several degrees off horizontal.

[@kakegarcia8056]

SUCH A GREAT INFORMATION, thanks so much, now I understand. Bests regards from a Venezuelan follower in Panama!

[@peterjohnson6273]

Don't you just hold the compass base so the needle swings easy?

[@clivedunning4317]

Thank you for a great explanation of a little discussed area of compass behaviour. I liked your wooden lecturing aids.

[@etherealrose2139]

Although I already knew about this material, I was curious on your presentation. Waffling aside, you had good visuals and explanations... things I wish I saw back when I learned about it. Really useful video for any newbie. Good job! Only downside, was waiting for you to break out the thermos for a nice cuppa while sheltering in the dell! What's your favorite type of tea?

[@nikob5899]

I take a guess - Yorkshire English tea😅

[@timbarnard4351]

well I raised a question directly on this a couple of weeks ago, maybe that's not a coincidence to get a new video to directly answer it ... either way, thank you ... all very clear as always!

[@g.w.moorman3887]

So essentially. the pointer in a global compass is mounted on a gimble. Sailors will appreciate that.

[@trektoid5092]

Great explanation. So can a global baseplate compass tolerate a greater angle of baseplate tilt than a northern hemisphere compass when used in the UK?

[@TheMapReadingCompany]

Yes - that's why a lot of people buy them

[@Shugosha.2Cor5.20]

Excellent video, great channel, thank you very much for sharing your knowledge, God Bless

[@LeftySurvival]

I'm completely amazed there's a magnet in the compass! I thought the needle was magnetized. Now I've learned something today and I'm so glad I did. This channel is very informative. I'm off to play with my compasses (NH & Global)...

[@nixie2462]

Damn man, I have NEVER seen a video about something I didn't know I was interested, catch me so hard in the first 35 seconds. Sir, you are hipnotic on another level.

[@ervano798]

Very interesting video, thanks for sharing. Since very long time it was a big mystery to me how such a global compass functioned. The reason why we need in certain places a compass with a global needle was very clear for me, but not how it works or be manufactured. I own two compasses, a plate compass is a normal compass, my bearing compass is a global type. I see the difference between both by their needle but i had no idee what really was the difference. Now i know it. Is this something i really need? No, i don't but it's very interesting and i am happy know to now it.

[@KarateLars]

Excellent explanation of something I was wondering about. Thank you for taking the time to make the video.

[@scottdenham1795]

So…. Why aren’t all reputable compasses made “global”?😅

[@BushcraftingBogan]

Friend: Whats that single spinning hand on your compass? Me: Its an inclinometer. Friend: Whats it do? Me: My compass has an inclinometer.

[@BradGryphonn]

Yes. I did find it interesting. Very interesting, actually. I have a relatively cheap orienteering compass that currently suits my basic needs. In the future, I'd like to invest in something that is more robust so that my clumsy self can't damage easily, and I can rely on to be accurate. It won't be a global compass, but still, I learned a lot from this video. Thank you.

[@jedsparks7324]

Cool, I didn't know that. I'm not sure I'll ever use that knowledge except to drive my friends bonkers. I'll keep my Walmart compass

[@1337flite]

NIfty. I've been wondering about that, being in the market for a global compass for my nephew who is an Army cadet and also likely to travel overseas when he is older.

[@peterszarvas94]

It's amazing. I only hike along trails with gps, but your videos inspire me to try out this method and off the trails. Of course in a safe way, start in a familiar small forest:) Thanks for sharing your knowledge

[@stephenconger2029]

Is there a kind of compass or similar device for visualizing magnetic field lines in 3d? Like a compass that wouldn't just point north and south but up and down as well (fluidly). I found a phone app once that gave xyz coordinates and this was close but less intuitive than I'd like. I've got some theories on storm cell rotation and relative effects on local magnetic fields I've been wanting to test.

[@allenshepard7992]

Thank you for another great video. Sadly, one reward may be a very stupid question. Does the lengty of the needle, seperation of north & south poles affect precision ? I've always thought a longer needle with the north end further from the south makes a difference. Granted size does not affect a spirit level much so I could be wrong.

[@liftingtheveil8361]

Why would you need so many different types of compasses?, if you are in the North a free suspended bar magnetic aligns North without dipping, same at the equator and same further south, it still points North.

[@DarkCoffee2]

Well... That's news to me! Thanks for the clearly understood explanation, as always!

[@1st1anarkissed]

Thank you for explaining an irritating factor this canadian has observed. The pointer does indeed collide with it's base too easily.

[@Seamus3051]

Excellent presentation, clear and demonstrative. Cheers.

[@joenicotera2991]

First time I've seen somebody draw the Earth with the North pole up. All of this time I thought all compass manufacturers had the South pole of the magnet in red and the North pole in white.

[@TurboLoveTrain]

Lovely video. 90% of the world population lives north of the Equator.

[@ChrisAthanas]

Americans would use the word “tilt” instead of “dip”

[@wonkydogleathercraft6698]

Wayne, brilliant course at the weekend near Hathersage, I learned a lot but also realised I need to learn a hell of a lot more. I took your advice and bought an expedition 4 instead of a global. See you on the gold award but not after loads of practice first. Thanks again Glyn

[@TheMapReadingCompany]

Hi Glyn, nice to meet you all over the weekend. I've sent you an email this morning with the results. See you in Malham next year then (on the Gold course)

[@dperreno]

This was a great video, but it would have been better if you had shown us at least a picture of an actual global compass next to a conventional one. Or was that Suunto a global compass? I mean, what does one look like? How much more do they cost?

[@AnthonyHigham6414001080]

What will a global compass do at the north or south pole?

[@TheMapReadingCompany]

You can't use a compass at the magnetic South Pole as all directions are north, same with the magnetic north pole where all directions are south. It gets stranger if you are at the geographic south pole as the magnetic south pole is out in the ocean, around 1,800 miles away towards Australia. In the Artic and Antarctic I’d probably use a GPS.

[@gerryrozema8338]

@@TheMapReadingCompany I've flown in the arctic a bunch, in the days before GPS. Astro compass is your friend. A good watch is also very handy when in an area with 24 hours a daylight during the summer. If you know what time it is, then you know what direction the sun should be, and you can use that to adjust the gyro.

[@DragonosisUwU]

So why don’t they just make the global compass? Feels like there’s no need for a local compass.

[@TheDieselbutterfly]

Who knew the guy from portlandia did compass tutorials😅

[@rudipalm9224]

How would the compas, work from the space ! Fx, the space station.

[@delta7087]

So would it be good to just get a global and be done with it? So no matter what or where you’re not gonna have a problem or if I’m in the northern hemisphere is I better to have one of those? Would it be more accurate in that particular area or would both be just as accurate as the other? Very intriguing and love your videos.

[@htomerif]

I think there's a little bit wrong here? The only compasses I have are military lensatic compasses and the magnetic part is embedded in a glass plate massive enough that while it can still turn the pointer, it isn't strong enough to incline the pointer to where it will ever touch anything, even with pretty strong external magnetic field forcing it down.

[@yo6own]

Others solved this by putting the needle on a brass disk and let the gravity compensate out the needle tilt.

[@colinprice712]

Inclinometer - use it to measure the dip slope of the rock strata. Geology students’ mapping tool.

[@Rose_Butterfly98]

I can understand now why I've never seen one sold here. We're 1 degree north of the equator. There's practically no tilt

[@roxasparks]

Nah... gimmie the quantum eletrodynamics yadda yadda video. I demand it!❤

[@skypucktrader9909]

Incredibly effective speaker and your props and visuals are outstanding. GREAT work!!

[@xionix4]

If you /do/ want to go into quantum electrodynamics at some point, I'm totally here for it. lol

[@A11V1R15]

I didn't knew compasses pointed to Mt. Everest, the "top of the world"

[@piedralite]

IN AERONAUTICAL CHARTS THE MAGNETIC FILD LINES ARE CALLED ISOGONS, AND THEY CHANGE A FEW DEGRES EACH YEAR, BUT IN THES CHARTS YOU CAN SE THE CORRECTION ANGLE, FOR A PRECISE NAVIGATION IN OTHER WORDS, YOUR COMPASS IS NOT REALLY POINTING TO THE NORT UNTILL YOU CONSIDER THE CORRECTION ANGLE PUBLICHED IN THIS AERONAUTICAL CHARTS.

[@Chris-op7yt]

the old style but bulkier sphere in liquid compass didnt have this problem?

[@TheFlyingPlectrum]

just hold the compass at the angle required to prevent binding!

[@simplefieldcraft]

And now I was this old when I found out about that little magnet in the middle. I thought it was witchcraft

[@MDyna32]

The other advantage of many global needle designs is that they can be accurately read while running, canoeing, etc thanks to the stable, fast-settling needle (1-2 seconds or less)

[@sheadjohn]

Seems like setting the magnetic declination would be more important than the needle dip.

[@Motoguzzi2231]

North and South indicating might be less confusing?

[@tracyrreed]

Pilots learn to do "compass turns" and learn the acronym UNOS which stands for "undershoot north, overshoot south". This is because the magnetic compass will dip and chase the magnetic field lines into the ground as the aircraft banks. In the US latitudes it's 30 degrees. So when turning to a northern heading you stop your turn when the magnet compass indicates 30 degrees short of north. So if making a left hand turn towards North you would stop your turn when the compass indicates 30 degrees. As you roll wings level the compass will finish swinging and settle on due north. When turning south you turn until your compass indicates having turned 30 degrees past south. If you are turning east or west you don't have to compensate by overshooting or undershooting at all. If you are turning somewhere in between you reduce the amount of under or overshoot proportionally. So turning to the northeast you would undershoot by 15 degrees. And you have to be able to do all of this in your head on the fly! This is why gyro compass is greatly preferred over magnetic compass. But the gyro compass can fail so you have to know how to use the magnetic compass and make these "compass turns" with the proper corrections. There's another acronym related to the compass which is ANDS which stands for "accelerate north, decelerate south" but this effect doesn't come up nearly as much. I'll leave an explanation of the cause of this one as an exercise to the reader.

[@TheMapReadingCompany]

I found that really interesting, thanks.

[@flyingdutchmanindustries5877]

That was very well done. Nice and simple, and no useless music!👍 Good use of 'clunky' props.

[@BrentHottle-gi2pe]

The best explanation of the differences that I’ve ever heard. Now I want to know why lanyards are always to short- bugs the crap out of me.

[@bryanst.martin7134]

My issue with a compass is that the Mag poles are moving ever faster. Read about airport runway number changes. Much of reality is kept from us the gen pop. So how do you determine your position or direction of travel if the map has old coordinates? Then, in about 30 years the Earth's crust will displace 90 degrees placing Antarctica and Greenland on the Equator again. I can't wait, imagine all those underwater cities being raised from the sea floor. A smart person might want to lay claim to them before the catastrophe. If they were able to survive the megasunamis and new climate in their location. Florida will be about 600 feet under water. And down around Chile region. When this event happens(again) you will feel it, but notunderstand what you are sensing. Takes less than a day to happen. Wooly Mammoth with fresh veggies in mouth and stomach, found frozen in ice. No "authority" questions this? I don't know anywhere a huge animal can eat 500 lbs or more per day in a frozen zone. It is so much harder to convince someone they have been fooled, than to actually fool them.

[@newolde1]

What are you talking about?

[@christalbert722]

very nice presentation- good usable info :)

[@nafnist]

I want to hear you waffle about virtual particles.

[@tomtom4405]

I do have a request. Stop filming so much in the lovely Dales. It's making me sad I'm not up there myself. Haven't been there since August :(

[@TheMapReadingCompany]

😊 this video wasn’t done in The Dales, it was done at Grey Millstone (near Mother Cap) in The Peak District, as I was running a course last weekend.

[@jimmypalavi]

Excellent video! Is there any type of compass that would be usable nearby iron, which of course can impart an infuriating magnetic field if its own.

[@causewaykayak]

A solar compass . An Astro compass. A polarising lugh compass. All unaffected by magnets.

[@joezephyr]

I bought my Silva brand compass in Sydney Australia. Will it be accurate in the UK?

[@TheMapReadingCompany]

Probably not if it is marked MS (Magnetic South), you will need an MN (Magnetic North)

[@EarlStirling]

The inclinometer is there to measure slope angle. Very useful if you're on a snowy mountain or hill and want to know whether you're in an avalanche danger zone. Plus it's easy to just print a few extra lines on the compass base, and you've got an extra feature to list on the packaging ;)

[@redf7209]

You could also use the slope angle to match with contours on a map to check position. The Silva inclinometer card allows you to match contour difference to a slope angle table that can be compared with an inclinometer readout. I'd prefer the need to do that stayed theoretical for me

[@AntonyFade]

Thank you very much!!!

[@aamiddel8646]

Very interesting. By looking at the dip of the magnet you get also an idea of the latitude.. (if you really get lost..)

[@fifthavenue8505]

But if quantum electrodynamics is the answer and you are not attempting to explain it, it makes me feel like I"m wasting my time listening to a simplified explanation that won't help me to understand how a compass aligns itself with the earths magnetic field. Quantum electrodynamics is just a scientific name -so what! Understanding what is happening with magnetism is what will help to use the compass. I think people do want the real explanation.

[@TheMapReadingCompany]

I don’t think that understanding Quantum Electro Dynamics will make anyone a better navigator when using a map and compass. I personally find it interesting but I could navigate just as well even if I had no idea at all about it. The scope of this channel is land navigation - OK I do, occasionally start to waffle on about other topics 😊 - so if anyone wants to study other topics there are always many, many websites and videos available for vitally every possible subject.

[@CHUNKYNUGGET666]

Cheers! I’m in the southern hemisphere should I look for SH or Global?

[@TheMapReadingCompany]

SH would be cheaper but I have heard reports of shops selling NH compasses without telling anyone.

[@StefKomGeekru]

Could you explain what the magnetic field is made of? Also, where do the compass points if you at at the north pole? Like does it flip entirely at some point if you cross it?

[@TheMapReadingCompany]

A magnetic field isn’t made of “something” it just “is”. You’ll need recall your school physics lessons and then you’ll remember that a magnetic field is made “by” electric charges which are moving but they are not made “of” something. Do you remember vector fields from your school days ? A school teacher who wanted to explain it so kids can understand it would say something like, a vector field is something which changes the way space works in a specific area. Object within this area will behave in a certain as they are being influenced by the vector field. For example a compass needle in the earth’s magnetic (vector) field. Hope this helps

[@hadesbearer]

Where was this filmed? Millstone Edge or Burbage South?

[@TheMapReadingCompany]

Millstone Edge

[@deltacx1059]

They could just make the case deeper or quit being cheap and just make the better design, it's a magnet in a box not rocket science.

[@MDyna32]

there are deep well compasses out there

[@Flashahol]

I did not find this interesting, it was fascinating!!

[@rob_l]

got a question if i'm in Australia and have a northern hem compass as you say the needle bottoms out due to the weights and the earths mag field so if I just tilt the compass so that it does move will this be a true reading

[@TheMapReadingCompany]

Yes. See the video at 9:20

[@pbingre]

Very well explained, thank you! Is there any remarkable difference in accuracy between these two kinds of compasses (single hemisphere vs. global)?

[@TheMapReadingCompany]

Not that I know of. I've used both, and they seem to be the same

[@pbingre]

Thank you very much! Meanwhile I've checked Suunto's website. Surprisingly they state their MB-6 Global has a compass accuracy of 2.5°, whereas MB-6 NH is slightly less accurate at 3°.

[@liftingtheveil8361]

Why does a bar magnet not dip in the North?

[@lescalger5336]

Great video. I thought I knew something about a compass, but this was new to me. Thanks.

[@jasonpm6401]

So why doesn't the "like" of the inner magnet repel the "like" of the outer arm?

[@TheMapReadingCompany]

The arm (north seeking pointer) is made from a non magnetic material

[@AdventureOtaku]

Ive been teaching "compass related activities" for 20+ years and didn't know the answer to this. Excellent job. Why do I buy a compass with an inclinometer?

[@Eragon954]

So you can measure surfaces in 3d space for geological mapping. At least that's one use.

[@Jonathan906]

@@Eragon954 I used to be a caver, and Brunton compasses (pocket transits, I believe Brunton terms them as) were and maybe still are used commonly in cave mapping because of their precision and their built-in inclinometers.

[@phillipmerritt1428]

A lot of good information.I think I knew some of it, but it was a great review.

[@zooknz1711]

Great videos - thanks

[@frankfaubert1927]

But,.... I want to learn about quantum electrodynamics. More waffle, more waffle, more .....😊

[@TheMapReadingCompany]

I was just thinking about quantum electrodynamics (as you do) and I made me fall asleep 😊

[@frankfaubert1927]

@@TheMapReadingCompany 😂

[@BrightBlueJim]

I discovered this myself, almost 30 years ago, when I was in college studying for an electrical engineering degree, and as a project developed a digital compass, which gave its best results when tilting down on the north end.

[@redf7209]

I think Geologist compasses will allow you to measure magnetic inclination as this varies a lot over the earths surface, so in some places there is a definite pull towards the ground than in other places. I suppose if this was mapped it could be another navigation tool but would probably change overtime like magnetic deviation

[@rogats]

That was very elaborate!