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ATPL General Navigation - Class 4: Convergency.

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ATPL General Navigation - Class 4: Convergency.
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Welcome to the 4th class in the General Navigation series.
Great Circles and Rhumb lines feature a lot in Gnav. In this class we look at a how to switch between the who and also how to calculate final tracks of Great Circles.
Sign up to Airhead ATPL question bank with a 10% discount with this link:
app.airheadatp...
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Aiming to assist with ATPL theory exams and the ground school aspect of ATPL training. Including helpful tips for studying and to use in the exam.
Check out the Insta for some real world examples of when we use our ATPL subjects.
Instagram: / atpl_class
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Опубликовано:

6 сен 2024

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Комментарии : 32

@atplclass 2 года назад

Just realised there is one scene where I didn't flip the image, my apologies.

@roynorb 2 года назад

No worries, this is quality education regardless. 🤓

@benstark2065 4 месяца назад

Found out I just passed Gen Nav. These videos really helped, thanks.

@hectorr13 Месяц назад

Just wanted to share a small little trick to remember how the rhumb line is drawn. Think about a pizza slice 🍕 If you are in the NH, the lines will be converging towards the N, the crust (RL) will be down of the GC line. SH opposite, lines of the 2 points diverge towards the N, crust (RL) above GC line. Just like the pizza!🍕 Thanks for making this content Grant❤

@ganthrithor 10 месяцев назад

Your explanation of the relationship between rhumb line and GC track and their relationship to convergency was extremely helpful. Other sources' text descriptions (even with supporting diagrams) have been pretty much useless. Thanks for the explanations!

@atplclass 10 месяцев назад

You're very welcome!

@nickkuipers4793 Год назад

You’re an actual life saver 🙏🏻

@helicopterbros7988 Месяц назад

Thank you very much ❤

@sondosmahmoud3097 9 месяцев назад

Thanks for your existence ❤

@markor2476 10 месяцев назад

Great explaining! Well done!

@Antonio-bc2ue Год назад

You are my hero man ❤

@FlyPh 2 года назад

are you doing private class? like a zoom meeting. I have some questions about course.

@johnblair2279 2 года назад

Great videos, that's for your help. One thing I am continually getting confused with is knowing what the question is actually asking and when to include the rhumb line. I have looked at your two questions, one where you use the rhumb line and the other where you don't but I can't see any clues to tell me when to include the rhumb line and when not. Maybe you could help me with this. Many thanks.

@atplclass 2 года назад

I always try and add as much information as I can to the drawing to help with the problem solving. In the case where both points are on the same latitude I know that if I follow that line of latitude it's a rhumb line. So I'll draw it on and add in either the 90/270 degree angle.

@arnoudbeck5963 Год назад

but that's just the case if they are on the same latitude right?

@neiliiho Год назад

why are the lines referencing north in your diagram converging and later on (when explaining the CA) diverging from the center?

@atplclass Год назад

Northern Hemsiphere vs Southern Hemisphere

@neiliiho Год назад

@@atplclass thanks so much! 💚

@ravindrakeshkar1518 2 года назад

Would appreciate radio navigation classes too Thank you

@atplclass 2 года назад

In good time

@ravindrakeshkar1518 2 года назад

@@atplclass Thank you so much

@matthewhung212 Год назад

Great video! But what if they are not at the same latitude? How can you calculate the convergency?

@atplclass Год назад

Take an average latitude, simple!

@alanmainwaring1830 Год назад

@@atplclass where is the proof, this might be the answer but I need proof

@Xatar7 Год назад

How is this videos for free?? Thanks man

@ChandraRJ 2 года назад

Re: the Example at 4:40… Did you make that up or get it from a Question Bank? Because it doesn’t make Sense… at 6:50, you have taken the Average of the Great Circle Track to get the Rhumb Line Track,… but that works out as 52.5°, whereas going East on a Parallel of Latitude it would be 90° {so Great Circle Track at ‘A’ should be 77.5°, and at ‘B’ would be 102.5°}

@atplclass 2 года назад

I know that in the example I used two points on the same latitude so you are right, the shortest rhumb line between them would be to follow the parallel of latitude it isn't necessarily the only rhumb line between the two points though. It is not always the case that they are on the same latitude so I was showing that by getting the average GC track you find the RL track, regardless of if the two points are on the same latitude. Hopefully that helps.

@ChandraRJ 2 года назад

@@atplclass When you Average a Great Circle Track, you *are* Finding the Shortest Rhumb line Track though and there is only the One Great Circle Track between those two Points and so an Initial Track of 040° it is *Not*, no matter which way round you go!!

@leonnielsen9284 10 месяцев назад

Hi Grant. I have enjoyed your videos a lot, they are generally very good,- but I have to agree with Chandra; you are way off with the GC initial track og 40 degrees. On any GC track on same latitude, the average GC track will be 90 or 270 degrees, and initial track will in be 90 or 270 +/- half of convergency,-in this case 90 -12,5 degrees (point A).