Lucien Ratel lol , you my tribe

I was a RC-135 navigator back in the 80-90s. Lots of cell and grid too.

You're welcome Michael!

Knowing the military they will have you watch it all in one sitting with only a few breaks and expect you to know it. Our method in the Marines was throw guys into a place with briar patches and cliffs at night time and give them a time limit to find boxes with numbers on them. If it dont make em good at navigation it will sure make em mean.

@@NathanielsCAD thanks for the old clips.

Total agreed.

Nice and simple demonstration

YES!

It's been 5 years now. Did you use it now on sea? I would like to hear from you. I'm a future seafarer too. I hope you'll receive my message.

Thanks Ambrose!

By manually computing means it takes time in real life application right

On a ship would you would plot the intercepts on a Universal Plotting Sheet.

You get the GHA of the first point of Aries from the Nautical Almanac. It's no longer in Aries, it is now in Pisces.

Kryss Tal website.. this will show you how to calculate.

Sight Reduction tables or by using a spherical trigonometry formula.

Google on "spherical trigonometry" for a full explanation. The formulae are more complicated than those for plane triangles but work in a similar way.

Don’t bother answering this numpty. I knew I’d find one here. He’s either a lying grifter flat earth numpty, or he’s lazy and regurgitating some nonsense from one of his idiot hero’s videos, or he’s truly stupid and cannot conceive of 3D space, thinking that the lines are CURVING toward each other because they look like that on the two dimensional video screen. The fact that they are STRAIGHT LINES, traveling over a CURVED SURFACE is far, far beyond him. Just ignore the idiots.

It's most likely either a WW2 "USN" or "USAAF training film" like this: kzfaq.info/get/bejne/naehqqihtbaUlKM.html Or you could try the National Archives: www.archives.gov/education/history-day/video.html

NathanielsCAD thank you so much!

I guess it's the British version of "Bowditch" then?

Yeah they still do I can assure you

yes, but to only higher level QM"s (E6 and above.)

Polaris isnt exactly above the top of our planet and its movement is measured year by year. Every night it circles the north celestial pole like every other star in the northern hemisphere. there is even closer stars to the pole than Polaris just not as bright.

What was being depicted was merely the Sun's northward change in declination toward the first point of Aries.

Oh man that is indeed an artifact (to put it gently!), subject matter though is very well presented.

It begins with those blessed with an understanding of geometry.

marshalcraft exactly! GPS uses the exact same principals, except with man made satellites acting in place of stars

Yes, same principle but different mathematics. With the use of a sextant, you are measuring the angle to calculate the distance you are from the GP of the heavenly body. GPS works on a signal sent from the satellite and your GPS is actually a receiver. Your GPS will receive the signal and decode it, and it works on the principle of the speed / distance / time equation. Your GPS knows the location of the satellite, the speed of the signal and the time in which it takes to get from the satellite to your GPS recieved. (there are some errors in which your GPS will apply (clock error, drift error) The GPS now now knows the exact distance you are from the satellite, and just like a single observation with a sextant - with one satellite you will have a circle on the earth. 3 satellites are required to give you a position fix. (however GPS uses 4 (see pseudo range)

@@ozzidan Satellites don't exist

@@ZackWolfMusic Yes, they do. Have you been in the middle of the ocean? No? GPS is working there.

@@marsa7600 No satellite Antennas exist not floating space satellites. Satellite antennas send and receive radio signals that is how gps and other things work out at sea.

You don't need to learn how to do celestial navigation.

@@marcg1686 actually i had to at my college

Because some people travel farther than your daily trip from your trailer to the mailbox to pick up your government check.

@@DoctorShocktor doctor, be careful what u said. I am sailor so i need this actually. But i said like this because really i can't understand. Yeah, this was using then but year is 2024.

Like your brain

That is the reason I was lost using celestial navigation 😂. 5 nautical miles from real position.

@@lucienratel5672 No..

No, it's not.

land surveying says otherwise. They’ve only been doing it for thousands of years.

This is ancient stuff. I have a GPS in my smartphone that pinpoints my location with greater precision and accuracy. Why go back to the stone ages, people? Hold on, my smartphone is on low battery so I need to find my charger cable.

The US and other Navy's would disagree, as in wartime GPS systems can be jammed, spoofed or put out of action entirely. kzfaq.info/get/bejne/b695gNWclbfWeY0.html

Whoever designed GPS had to know this!

My boat has all the best electronics…oops, what happened to the power? Where am I?!?!?!?

YOU don’t need it, because WE don’t care if you get lost and die. So don’t worry about it champ.

Lol Imagine having a dead battery 🤡

So you’re working through a series of banned accounts? Shocking.