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Sextant Tutorial: The Principle of the Sextant 

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✔ Casual Animation is all about creating engaging content for education and training.
✔ This video is an example of content that we produce for maritime training providers. To purchase a copy to use yourself visit: gum.co/peGY
---------ABOUT THE VIDEO---------
This video was originally uploaded to our other channel, Casual Navigation, back in 2018.
The sextant is one of the fundamental navigational instruments. Once you have mastered it, you can navigate the world without the need for a GPS.
This video is the first in a series which will teach you how the sextant works and how you can use it.
This video covers Parts of the Sextant, and the Sextant's Operational Principle.
The next video will cover Sextant Errors and Methods of Corrections.
The final video will cover Taking Sights.
----OTHER TOPICS WE COVER----
Consider subscribing to the channel if you are interested in any other topics we plan to cover:
✔ Behind the scenes of my other channel, Casual Navigation.
✔ Tutorials about creating engaging content for education and training.
---------DISCLAIMER---------
This video should not be considered professional advice or education.
We try to make the content as accurate as possible, but the responsibility rests with the viewer to determine the full accuracy and reliability of the content.
Any action you take as a result of watching this video is strictly at your own risk.

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29 сен 2024

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Комментарии : 534   
@fredrichenning1367
@fredrichenning1367 Год назад
This was still used in the US Navy in 1956. Every day, the destroyers in the screen around the aircraft carrier had to send in their positions calculated using a sextant. One day, one was hundreds of yards off from all the others. The officer responsible was told to "do it again". I know, because I sent the message.
@richardbloemenkamp8532
@richardbloemenkamp8532 Год назад
Did you send the message with the wrong position or the message telling the officer to do it again? It sounds like a nice story but it is actually quite confusing. It also begs the question whether it was much better the second time and what had gone wrong the first time and, of course, whether there was any punishment or correction and whether you feel you had any responsibility.
@fredrichenning1367
@fredrichenning1367 Год назад
@@richardbloemenkamp8532 - The second attempt was "in the group", so acceptable. I don't know if the officer got a slap on the wrist or not. Why should I have had any responsibility? I was just the radioman. both sending and receiving PS. Our destroyer was the command destroyer of the squadron, which is why I was involved at all. Actually, this made my job quite interesting, since all the info back and forth flowed through us. The radio gang was the most "informed" bunch on the ship!
@richardbloemenkamp8532
@richardbloemenkamp8532 Год назад
@@fredrichenning1367 Ok, thanks for the information. That makes sense. Of course as are radioman you are not responsible, but I can imagine that with certain messages you know that there can be severe consequences for individuals. Probably not the case here.
@fredrichenning1367
@fredrichenning1367 Год назад
@@richardbloemenkamp8532 - The thing that amazed me was that they put their positions reasonably within a hundred yards or so just using a sextant -- in the middle of the whole damned Pacific. Shackleton would have nodded approvingly, I bet. BTW. Where possible, we used LORAN, of course. As a radioman (AND "captain's talker"), I spent a lot of time on the bridge hobnobbing with the officers. Even steered the destroyer once for five minutes, 'cuz the helmsman had to go take a piss (nobody else was on the bridge just then, LOL). Interesting times!
@billcook4768
@billcook4768 11 месяцев назад
Devices that aren’t nearly as fun as the name would suggest.
@TheBinarydeity
@TheBinarydeity 3 года назад
awesome vid. Pirates wore eyepatches to have one eye they can use in the darkness of the hull. there was only one navigator per ship.
@Nyxra
@Nyxra 2 года назад
I dont think that was really true. Pirates probably wore eye patches for the same reason anyone else did. Not to mention being around explosions involving wooden splinters flying as shrapnel, its even easier to assume an eye patch was worn to protect a wounded eye form the sunlight/dust etc.
@lostboys-sailingteam576
@lostboys-sailingteam576 2 года назад
True about the eye patch, but the number of navigators on board depends on the ship it was. In the british navy for exemple, there is a master that is responsible but all midshipmen would take sights throughout their watch and all lieutenants and supperior officers were supposed to keep a log with their personnal sights and estimated position. In the merchant navy, before precise chronometer, they would only be able to know lattitude so they would sail to the lattitude of their destination and then head west or east. The captain, first officer and master would all take sights at noon. It wildly depends on type, size, and purpose of the ship and on the period.
@jackster2568
@jackster2568 2 года назад
I see, whereas the everyone else used fluorescent lighting in their vessels to remove the need for eyepatches?
@sempertalis1230
@sempertalis1230 5 месяцев назад
Plastic sextants are also much lighter than metallic ones. If you ever used a sextant in heavy or rolling seas you know what advantage this is 😊
@BenjaminMacDonald-e1i
@BenjaminMacDonald-e1i 6 месяцев назад
Awesome animation as well as explanation. Thanx man for the effort.
@RootedHat
@RootedHat 4 года назад
Time to prepare for the Apocalpyse ! Navigation won't be a problem now
@GroverHeltzel
@GroverHeltzel 7 месяцев назад
Never heard any explanation but this is exactly what I thought the first time I saw one.
@Manishkumar-bg8ch
@Manishkumar-bg8ch 5 лет назад
just amazing....in hope to see video on ECDIS. love from INDIA
@billylili
@billylili 2 года назад
I took a geography class to learn the datelines, and maybe use a sextant.
@fyoozhn
@fyoozhn 2 года назад
this is the part where i shut up and let you infest my brain
@DH-xw6jp
@DH-xw6jp 10 месяцев назад
Don't worry, i'm a master of the Sex Tent. Oh. You said _sextant?_ Never heard of it.
@harbourdogNL
@harbourdogNL 4 года назад
Excellent video, thank you.
@ultrammm2541
@ultrammm2541 4 года назад
I was watching Doctor stone and Senku made the sextant. I was wondering how it worked!!!
@kingdomnate6906
@kingdomnate6906 3 года назад
omg i love doctor stone and am here for the same reason lmfao
@silver3766
@silver3766 3 года назад
Same lol
@hendihart5195
@hendihart5195 3 года назад
we gathered here for the same reason
@chris-yx7vx
@chris-yx7vx 3 года назад
sameeeeee
@thekmmaster4149
@thekmmaster4149 3 года назад
Same
@ekdujhekeliyeentertainment497
@ekdujhekeliyeentertainment497 3 года назад
Thank you. I am here because I was just curious.
@frankzeng509
@frankzeng509 Год назад
appreciate the explanation, but in 06:15, I did not get the idea. You said "the angle between the incoming and outgoing ray of light [(I+x)+(I+x)] is twice the angle between the mirrors [(x)*2=2x]", which makes 2*(I+x)=2x, and apparently its not right. It should be the angle of the ray of deflection equals to twice the angle between the mirror. The degree of deflection is 2x.
@spmep
@spmep 4 года назад
This video is great, but there is a low frequency hum that is very distracting.
@svlittlegem24
@svlittlegem24 10 месяцев назад
Not quite true. The eye patch was used to adjust the eye below the decks. Gerard.
@Harthelos04
@Harthelos04 3 года назад
Aren't the eye patches for when sailors go below the deck? Since it's pretty dark below, they wear an eye patch so they don't have issues with visibility both outside the deck and inside.
@dogwalker666
@dogwalker666 3 года назад
Yes that's what I was taught.
@hernerweisenberg7052
@hernerweisenberg7052 2 года назад
I thought it was the other way around - so that at night, they can take a peak at some charts in the cabin with candle light and go back on deck, lift the eye patch and see in the night without waiting for the other eye to adjust ;)
@gubenuben2
@gubenuben2 2 года назад
@@hernerweisenberg7052 maybe both?
@kaan_isik
@kaan_isik 2 года назад
You really think a ship that cost with hundreds of millions dollars can't provide a simple oil lamp? I mean really? :|
@madzen112
@madzen112 Год назад
Was also sold as 'The eyepatch-making machine!'
@m005kennedy
@m005kennedy 4 года назад
Is the sexant that Harbor Freight sells for $20 usable or just for decoration?
@BobbieGWhiz
@BobbieGWhiz 4 года назад
Mike Kennedy Just decorative. Many similar on Amazon and eBay. They also are very small, but look nice on a desk. A navigational sextant has to be made very precisely.
@lornenoland8098
@lornenoland8098 Год назад
Imagine the unnamed genius who invented this centuries ago
@jocelynmonton6552
@jocelynmonton6552 5 лет назад
PERFECT
@phmwu7368
@phmwu7368 4 года назад
jump to 6:15
@Quixpeed
@Quixpeed 8 месяцев назад
You've forgotten to highlight who invented it first !! it was Abu-Mahmud al-Khujandi, an Iranian Muslim scientist in 994 AD.
@LisaAnn777
@LisaAnn777 7 месяцев назад
Because that doesn't really matter for this video since it's on how to use it.
@User-g2c7t
@User-g2c7t 3 месяца назад
​@@LisaAnn777I'm glad they've shared
@ksmurphable
@ksmurphable 2 года назад
Anyone else notice at 0:42 the joke about needing to be able to use the sextant when your mad.
@rajeshr2500
@rajeshr2500 2 года назад
I have this one..
@spacevspitch4028
@spacevspitch4028 2 года назад
I don't know what's wrong with me. No matter how much the explanation is slowed down, I just can't conceptualize it all and make it make sense in my head. Like, the mirror on the arm is at a slight angle itself. What is that angle and why?
@karhukivi
@karhukivi 2 года назад
The mirror on the arm is at a slight angle as is the other one on the frame below it, so that the observer will see both the direct image and the reflected one coming from the upper mirror..
@onemanoutfit
@onemanoutfit 4 года назад
120 degrees
@pz3j
@pz3j 8 месяцев назад
I just dont get it...😢
@dumpy4289
@dumpy4289 Год назад
i i sir!
@theboiyoulove5124
@theboiyoulove5124 2 года назад
wilbur songs brought me here
@Box52222
@Box52222 9 месяцев назад
Great to hear that gay people are becoming interested in navigation too
@Andrea2601M
@Andrea2601M 9 месяцев назад
I bet you think this comment was smart
@LisaAnn777
@LisaAnn777 7 месяцев назад
Clearly I am too slow to understand this joke.
@maggiemay427
@maggiemay427 9 месяцев назад
Eh???
@marko5894
@marko5894 Год назад
Isaac Newton was a genius to come up with this contraption.
@2secondslater
@2secondslater 3 года назад
The advantage of a plastic sextant is not just that it is cheaper, it won't corrode
@punsarethelowestformofcome352
@punsarethelowestformofcome352 3 года назад
I was looking at a bug an my wall, thought if I could find its coordinates (Cu’s I recently learnt bout Descartes in school...), decided that I’d bee too much work to draw a friggin coordinate plane on my wall to find the answer and thought that I could use a sextant Cu’s I saw it in Dr. Stone (I don’t think this would work in that way but I’m here to learn, sooooo.....)
@ushamasaneel1670
@ushamasaneel1670 3 года назад
I wonder who came up with this name?
@dogwalker666
@dogwalker666 3 года назад
It's Latin for 1/6th of a circle or 60 degrees, you just have a dirty mind 😉
@ushamasaneel1670
@ushamasaneel1670 3 года назад
@@dogwalker666 i didn’t know Latin 😉. Anyways thanks.
@dogwalker666
@dogwalker666 3 года назад
@@ushamasaneel1670 👍🏻
@gadgetinspector7875
@gadgetinspector7875 3 года назад
This could only work on a flat earth
@iveneverseensuchbehaviorin5367
@iveneverseensuchbehaviorin5367 3 года назад
this only works on a spherical earth
@dogwalker666
@dogwalker666 3 года назад
But flatardia is impossible, QE and Slappy dude Oakley are lying to you they don't know how to use a sextant or a compass. Welcome to the globe!
@dogwalker666
@dogwalker666 3 года назад
@@iveneverseensuchbehaviorin5367 exactly. Flerfs are so stupid.
@marcg1686
@marcg1686 Месяц назад
I have seen you before in the live chat over at bitchell's. How is the clown doing?
@gm3801
@gm3801 10 месяцев назад
After reading your warning at the start of this video I will skip this..
@someoneelse.2252
@someoneelse.2252 2 года назад
Captain George Vancouver, tutored by Captain Cook, sailed 65,000 miles, never lost a man to scurvy, charted all the west coast of Canada and Hawaii, with only a sextant. Incredible sailors back then.
@nostradamus7648
@nostradamus7648 Год назад
His first mate was a very young Cap'n Crunch
@ianbruce6515
@ianbruce6515 Год назад
Both Vancouver and Bligh were proteges of Captain Cook. Unfortunately for them, Captain Cook came from a time when it was possible for an ordinary seaman could rise to the post of Captain, even Admiral. By the time the careers of Vancouver and Bligh got started, the British caste system had pushed it's way into the navy. Bligh had a particularly hard time of it, struggling to gain the respect of his upper class officers. The army officer corp had always been the preserve of the hereditary rulers of Britain. When the prestige of the navy increased, they moved into the navy. The descendents of the Normans who conquered Britain in 1066 and had held their conquered lands and all the positions of power over the centuries, now saw the navy as important as the army.
@johnstonewall917
@johnstonewall917 Год назад
Clock?
@philgray1023
@philgray1023 Год назад
​@@ianbruce6515Commissions were bought all along. Not a lot of difference in the 70s either. If you went to the right school (paid) you would have a much higher chance of a commission. I was in with guys who were brilliant (based on IQ tests) and they had to rise up through the ranks, whereas I never met an Eton old boy scrubbing the decks. And yes we actually did that. A very rare beast then was a Commander who had started off as an ordinary able seaman. He was regarded with awe and fear because he was an unstoppable force with total iron discipline.
@g.jeu.2187
@g.jeu.2187 Год назад
Who invented the sextant ? Who made the sextant in production ? Who thought the first sailor man ?
@michaelreid1362
@michaelreid1362 3 года назад
Love this, love this channel, and really appreciate your commitment to this sort of VERY high quality educational programming. 11/10, am binge watching them all. Thank you.
@chrstnvtg
@chrstnvtg 4 года назад
I'm watching this because yesterday I watched the Sylvester Stallone's movie titled: "Escape Plan" and a sextant was used there. EDIT: Thanks for the likes and the comments. 😽
@koski7579
@koski7579 4 года назад
Lol same here
@magnumbers9255
@magnumbers9255 4 года назад
Same here
@gusthemagickbus7256
@gusthemagickbus7256 4 года назад
Same!!
@gusthemagickbus7256
@gusthemagickbus7256 4 года назад
And I found one on Amazon!
@tomasrauktys5746
@tomasrauktys5746 4 года назад
me to😂
@rayopeongo
@rayopeongo 4 года назад
It would be nice if you had mentioned the whole point of a taking a sight with a sextant in the first place, that measuring the height of a celestial body like Polaris or the sun above the horizon can be used to determine your location (latitude and longitude).
@alangreen4156
@alangreen4156 2 года назад
Where sextants around before ships clocks?
@rayopeongo
@rayopeongo 2 года назад
@@alangreen4156 Yes. Sextants could always be used to measure latitude accurately. The ship’s clock made them very accurate for determining longitude as well.
@karhukivi
@karhukivi 2 года назад
@@rayopeongo Before ships' clocks it was possible to determine longitude approximately using "lunars" i.e. the angular distance between the Moon and a known star or sometimes the Sun.
@karhukivi
@karhukivi 2 года назад
@Joël With Polaris, only latitude.
@rayopeongo
@rayopeongo 2 года назад
@Joël Latitude is easy with Polaris, or sighting on the noon day sun. Figuring out longitude is much more difficult, and requires a very precise clock. That is why the British parliament offered prizes for anyone who could invent a chronometer that was precise enough for determining longitude. en.wikipedia.org/wiki/Longitude_Act
@pona6411
@pona6411 2 года назад
twenty thousand leagues under the sea brought me here 🤣🤣 i was curious to know how to operate the sextant and once again, thanks to RU-vid, I’ve gained some knowledge that I may never use in real life !
@kaan_isik
@kaan_isik 2 года назад
That would be me as well, the Walter James Miller and Frederick Paul Walter's translation, right?
@malthus101
@malthus101 6 месяцев назад
simply buy a sailing yacht for $500,000 and head off to sea. Then you'll be able to test your sextant knowledge. Problem solved - simple!
@FlokisMonkeyVoodoo
@FlokisMonkeyVoodoo 3 месяца назад
You never know mate. Weird shit has been going on and it doesn’t appear to be getting any better.
@jayerjavec
@jayerjavec 4 года назад
Thank you, always wondered how the heck this thing works and you delivered in great way. Also, loved the insight about why pirates wear an eye patch.
@skhotzim_bacon
@skhotzim_bacon Год назад
Well it's not the only reason. Another reason for an eyepatch is to see better in low light environments such as below deck
@malthus101
@malthus101 6 месяцев назад
I'm definitely too dumb for this.
@SamSammy-r6e
@SamSammy-r6e 4 месяца назад
Ig thats true for a lot of us
@1unawesome644
@1unawesome644 4 месяца назад
No friend you just have to learn some basic principles and by basic its math.. the US has made people hate math because it is the humans universal language and they don’t want us to have that knowledge
@malthus101
@malthus101 4 месяца назад
@@1unawesome644 could well be true...
@IGORGOUZENKO22
@IGORGOUZENKO22 3 месяца назад
Bro no one wants anything from you ​@@1unawesome644
@cyrax1700
@cyrax1700 Месяц назад
😂😂😂... Me too.
@kenneth1680
@kenneth1680 3 года назад
I totally regret watching this while hammered..at some point in my life I'll totally need this info
@avatar1867
@avatar1867 3 года назад
I hear you can make a makeshift one with paper and string? Something like that. Better get on it! You gatta know where you WHERE in order to find out where you ARE, so when you're lost, you know where you ARE, because you know where you were!
@kaan_isik
@kaan_isik 2 года назад
@@avatar1867 We're not in the Nautilus, captain. Use a GPS or smt
@SimonTekConley
@SimonTekConley 2 года назад
Harbor freight, $22
@SimonTekConley
@SimonTekConley 2 года назад
Also, yeah, i get afraid when things randomlt come up, like, why am i going to need to know this., i don't want to be in that situation
@FlokisMonkeyVoodoo
@FlokisMonkeyVoodoo 3 месяца назад
@@kaan_isiksatellites could fail
@jeffbrownstain
@jeffbrownstain Год назад
While I'm sure undereducated sailors burning their retinas out contributed, I'd always learned that the eyepatch was a primitive form of underdeck preparedness: sacrifice a little bit of peripheral vision for instant access to low-light vision when moving quickly between decks. Even militaries teach to keep one eye closed when operating in between the bright sun and indoor locations for extended periods.
@us3rG
@us3rG 6 месяцев назад
Covered eye also works better at night
@johjoh9270
@johjoh9270 2 месяца назад
Excuse my uneducated ass, but considering NVG's are standard issue these days and that they can be regulated so you could use them in broad daylight, if you're willing to sacrifice peripheral vision, isn't it better to use those? lose colours too but on trade you could also adjust to look into dark areas from outside, say a window where someone might be hiding or the opposite, look outside from a dark building into a bright day and such by just changing gain
@MindbodyMedic
@MindbodyMedic 2 месяца назад
​@@johjoh9270they cost a LOT of money and break in rough conditions easily. Unless you're using state of the art
@Wangpi3ce
@Wangpi3ce 2 месяца назад
@@johjoh9270 Are you talking about modern sailors using NVGs? Visibility below deck hasn't been an issue since the invention of the lightbulb, and they would be almost useless for looking at anything outside a warship because _nothing_ that could ever pose a threat is getting that close to a modern warship anyway. Anything that tried would be sent to the abyss expeditiously, probably before it even crested the horizon. Plus even the cheapest reliable NODs are running you 4k at the minimum. Those fancy quad nods are 40 grand.
@9b85e5da6d
@9b85e5da6d 5 лет назад
And i thought pirates wore eye patches to cover a missing eye that was wounded in a sword fight.
@nadiakhan7487
@nadiakhan7487 4 года назад
thought the same LOL
@evilskills
@evilskills 4 года назад
That information is actually wrong, below deck in old ships you would generally not see very much in the middle of the day because its really dark down there so they would use an eyepatch to cover one of their eyes so they don't have to wait for their eyes to adjust
@ge200099
@ge200099 4 года назад
@@evilskills That's very interesting! Thanks for sharing!
@fakenamefakename12345
@fakenamefakename12345 4 года назад
Pontus Eriksson Yep you got it. I was gonna say the same thing!
@codyleslie478
@codyleslie478 4 года назад
@@evilskills mythbusters
@robins7357
@robins7357 Год назад
Do you have a source for me regarding the "eyepatch because sextant burns" topic? Don't get me wrong, I'm not trying to "um, actually ..." you, but I only ever heard they were for adjusting to the darkness below deck more quickly. I'd like to educate myself a bit further if there were multiple reasons for eyepatches :) anyway, great video, thanks!
@Justwantahover
@Justwantahover 2 года назад
Despite the flat earther's claim that a sextant can only work on a pancake, no flat earther has ever shown how it "works".
@karhukivi
@karhukivi 2 года назад
It can't work as all the calculations are made using astronomical determinations of Sun, Moon, planets and star positions which derive from a rotating spherical Earth.
@EternaL1fe
@EternaL1fe Год назад
@@karhukivi Is there any evidence to this, or is it just a theory?
@karhukivi
@karhukivi Год назад
@@EternaL1fe The evidence comes from astronomical observatories, astronomers, and hundreds of thousands of navigators who use and have used celestial navigation for the last three hundred years. Every space agency in the world use this data, as well as topographers and geophysicists and geographers who study the planet. By the way, a "theory" is science is not some notion from a magazine, it is a well-tested set of observations and predictions backed up by mathematical reasoning and widely-accepted by knowledgeable people.
@A_J502
@A_J502 Год назад
@@karhukivi Very well said. Basic navigation doesn’t work on a flat earth.
@annabellethepitty
@annabellethepitty Год назад
I was in the US NAVY a good friend of mine was in the department that handled navigation on the ship we were on. He showed me how to use a sextant. We wrote the math out both ways and it does not work if the earth is flat. So in short, we know the earth is round because we can navigate around it with the stars.
@bronxer78
@bronxer78 Месяц назад
At time stamp 03:45, many old sailors wore eye-patches because of splinters from cannonades. Other than that, good video!
@MikeBabsBC
@MikeBabsBC Год назад
Me@ midnight: Think I'll turn RU-vid off and go to bed. RU-vid: But do you know how to use a sextant? Me:........ Go on....
@evilfluff6634
@evilfluff6634 3 года назад
No old sailor wearing a eyepatch is because older sailboats was harder to light below deck you don’t would like to use a candle next to a barrel of Blackpowder and to refracting sun light below the deck was hard and someone maybe working on deck a block the lens and port hole was not used as much because of the price of glass and the fragile if it. And yes sometimes they use eyepatches because of damage to the eye but just because they looked at the sun with a magnifying glass it should look the same as the other endless they was too stupid to feel the pain of the sun trying to eat their eye on fire and that is most likely impossible. But in battle flying pieces of wood could hit the eye but a sextant damaging the eye so bad that the man had to cover it I think not. But to keep one of the eyes adopted to the dark for going below the deck ok. Now if you cover one eye it maybe easier to handle the movement of the rolling sea without getting sea sick. If you want to get sick fast on a boot use a pair of binoculars with two eyes and look at the horizon to long you will be feeding the fish.
@DesGardius-me7gf
@DesGardius-me7gf 4 года назад
EDD: Yes, well, it's all fun and games but merrymaking nearly cost us this sextant. (Eddy snickers) EDDY: You catch that, Ed? Uh... the what? I missed that! What's it called? EDD: It's called a sextant, an astronomical instrument used to... (Ed and Eddy snicker) EDDY: Again? Sorry, I missed it... what's it called? EDD: It's commonly known as a sextant, Eddy... (Ed and Eddy burst into laughter) ED: SAY IT AGAIN, DOUBLE D! (Edd realizes what’s Ed and Eddy are getting at and blushes.) EDD: Oh my!
@williamminyard5517
@williamminyard5517 3 года назад
Clever.
@systembypass6930
@systembypass6930 3 года назад
I miss that show. Some of the last of the great cartoons.
@nostradamus7648
@nostradamus7648 Год назад
Beavis: You said Sextant Huh, huh huh huh huh. Huh huh huh huh Butthead: Shut up, Beavis
@Psycandy
@Psycandy 9 месяцев назад
couldn't they have thought of a better name for the instrument like anglesighter or latlongerator or even youfindigator.
@oogaming2862
@oogaming2862 3 года назад
Narrator: Luckily it's a LOT simpler than it looks.. Also Narrator: we're gonna have to break it up into 3 tutorials. .... fuck.
@WhizoRiz
@WhizoRiz Год назад
Not sure why I ended up here, but I truly feel like these methods of understanding how to navigate our blue planet in relation to celestial bodies shouldn’t be a lost art
@maths-pro-by-khan-sir
@maths-pro-by-khan-sir Год назад
*Very nicely explained and most elaborate information...... Thanks a lot, Brother 🙏*
@philip6419
@philip6419 Год назад
Eyepatch keeps one from 'burning' the eye? Hahahaha VERY stupid reasoning!
@Obi1-KenBone-Me
@Obi1-KenBone-Me 3 года назад
Planning on using one of these for night vfr these monts,lets see how itll go
@williamrussell3811
@williamrussell3811 Год назад
This should be MADITORY learning for flat earthers!!!
@robertlafleur5179
@robertlafleur5179 Год назад
They will still say nuh-uh.
@amos8572
@amos8572 4 года назад
I just watch this video to listen to the guy talk.... It's relaxing.
@ievgen2229
@ievgen2229 Год назад
Хорошее объяснение. Я пользовался им для определения места корабля в море,когда учился в высшем морском учебном заведении. При походе вокруг Европы. Определял по нижнему краю солнца,луны,звёздам. Важно знать точное время,ведь земля за 1 секунду поворачивается на 400метров. Вычисления занимали 30минут. Много разных нюансов. А изучали работу с ним на случай,если GPS отключат.
@denisiwaszczuk1176
@denisiwaszczuk1176 3 года назад
Thank you for that ,Just learning. My Father said to many times at sea Captain cook Didnt use Radar GPS
@andiershad6285
@andiershad6285 2 года назад
Any1 from Lovejoy?
@josecabezas6159
@josecabezas6159 Год назад
la naza probo uno expasial en progama lansadera de trasvordadores
@yesterdaily7053
@yesterdaily7053 5 лет назад
It's a great and very informative video. I never thought that sextants are used in that way. Do sailors still use sextants nowadays or you rely on gps more often?
@harbourdogNL
@harbourdogNL 4 года назад
REAL navigators know how to use a sextant, whether they use it or not.
@huehnerfrikassee
@huehnerfrikassee 4 года назад
Most probably rely on GPS, or atleast the ones I know and me myself do. However, you must always be prepared for it to fail, so you generally know how to navigate without any electronics and such
@kaan_isik
@kaan_isik 2 года назад
@@harbourdogNL Damn, calm down man
@pabloricardodetarragon2649
@pabloricardodetarragon2649 Год назад
A good sailor, even with the very useful GPS, has his sextant, the HO249 tables, and a few little items to be able to navigate old way in case of.
@ghostfrost999
@ghostfrost999 4 года назад
Why am I watching this at two in the morning?
@existentiald562
@existentiald562 4 года назад
Well im watching at 4 in the morning
@mattsupertramp6506
@mattsupertramp6506 4 года назад
I don't know are you lost at sea?
@ghostfrost999
@ghostfrost999 4 года назад
@@mattsupertramp6506 no, i was sleeping on my bed
@ghostfrost999
@ghostfrost999 4 года назад
@Fermentum Mobile if lost at the sea you mean lost at the ocean of dreams, well yes 🤣
@kurtsteiner8384
@kurtsteiner8384 Год назад
Very intersting as a former mariner. Not sure about the sailors eye patch theory. They covered one eye to get acustomed to dark light and one for daylight. So you got acustomed to it, before going on watch at night.
@josecabezas6159
@josecabezas6159 Год назад
se usa para orientarse los navegantes
@mosesmanaka8109
@mosesmanaka8109 Год назад
I still can't figure out what are you trying to read with the sextant?
@Oddball5.0
@Oddball5.0 Год назад
You read the angle between the horizon and an astronomical body.
@edwardfalk9997
@edwardfalk9997 2 года назад
I've taken the liberty of creating a playlist for this series: ru-vid.com/group/PLetA5Fi4kpULSexPc4Xul4Uq-8HoqifOd
@telldpablo
@telldpablo 4 года назад
Thank! Really found your explanation very helpful. No one else explained it so completely as you did from what I’ve found. Just one question. Why is it (I+I) + 2x and not 2I+2x? Thanks
@kaan_isik
@kaan_isik 2 года назад
In math it doesn't really a matter, so you can also call it 2 I if you'd like to call
@thejamesasher
@thejamesasher 3 года назад
better than the how to calculus vids. I understand this
@chloes385
@chloes385 3 года назад
Ed Edd n Eddy brought me here
@CrimSang420
@CrimSang420 Год назад
...wasn't the eyepatch mainly so you retain low-light vision in your other eye when going below deck in combat situations?
@kbotah2023
@kbotah2023 4 года назад
How in the hell did someone ever figure out how to make a sextant in the first place when I cant even understand it after watching a video?
@DoctorJaguarChannel
@DoctorJaguarChannel 4 года назад
SAY IT AGAIN DOUBLE D
@BalboaGoku
@BalboaGoku Год назад
Oh my!
@chriszablocki2460
@chriszablocki2460 Год назад
On principle, you only have two hands. What you need 19 firearms for? You dont lead a militia. And dont even know your primary rifle.
@CaptainSwoop
@CaptainSwoop 4 года назад
Excellent presentation and much appreciated ... Thanks. God bless the British. You sound like Professor Brian Cox. Sure beats the cocksure, can-do alternative. Greetings from OZ.
@joelkoonce8559
@joelkoonce8559 Год назад
Good thing They had Sexton's before Columbus, or They would have fallen of the edge of the earth.
@austinhadley6086
@austinhadley6086 3 года назад
My ancestor invented this device
@dogwalker666
@dogwalker666 2 года назад
Honestly? You are related to John Hadley cool you should celebrate the 290th anniversary this year!
@truelyfine
@truelyfine Год назад
He’s an ancestor to a lot of people. Most who don’t share his name. 👍
@hugebartlett1884
@hugebartlett1884 Год назад
Not the easiest of tasks on a pitching and rolling deck! Tricky stuff in a storm. Not often used on a submarine.
@azazahamed5447
@azazahamed5447 3 года назад
fantastic presentation with visualization.
@BobDingus-bh3pd
@BobDingus-bh3pd 18 дней назад
I realized that without Google or predawn maps I basically have no idea where I am on this planet.
@mjohan4998
@mjohan4998 2 месяца назад
Eye patch was used to maintain night vision in one eye so that they could acclimate to darkness faster than those that didn’t wear one
@connergiven89
@connergiven89 Год назад
Isnt (I+I)+2x just 2I +2x?
@jusufagung
@jusufagung Год назад
I thought that the sailor's eye pad was due to the wound inflicted by his pistol.
@geoffreywilliams7705
@geoffreywilliams7705 2 года назад
This is a little too long winded. More to the point is what are we trying to measure and why is it usefull . .
@irvingkurlinski
@irvingkurlinski Год назад
Another lame chiropractor. They think they're real doctors. lol
@jthepickle7
@jthepickle7 Год назад
Hellloowww! Um...helloowww. I'm lost. ...that part about errors...
@SeranaKnight
@SeranaKnight Год назад
Oh yeah, Sam Witwicky brought that to class.
@alieskandari6956
@alieskandari6956 5 лет назад
perfect
@rubberestateinkanyakumari5847
@rubberestateinkanyakumari5847 4 года назад
Your animations extra ordinary
@rolandgo6744
@rolandgo6744 Год назад
This is the guiding system used by Apollo 11 to land on the moon
@ericzurbrugg2309
@ericzurbrugg2309 Год назад
still dont get what the two eggs have to do with this magical tool🤷
@Ma-pz5kl
@Ma-pz5kl 10 месяцев назад
too much rotation in your graphic where there is no need
@Kilbylol
@Kilbylol Месяц назад
maybe use a sextant
@boataxe4605
@boataxe4605 10 месяцев назад
Silly me, I thought it was the tent that myself and my girlfriend take with us when we go camping.
@User-g2c7t
@User-g2c7t 3 месяца назад
The sextent! 😂
@josecabezas6159
@josecabezas6159 Год назад
si estuvo en los mares del sur oceano pasifico
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