OLS ( Obstacle Limitation Surfaces ) fully explained with All "9" surfaces in one video 🔥👌
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- Опубліковано 3 гру 2021
- Safe operations at an aerodrome require continuous monitoring and assessment of possible infringements of the Obstacle Limitation Surfaces (OLS), as prescribed in the relevant regulations such as ICAO Annex 14 (Chapter 4).
These Obstacle Limitation Surfaces (OLS) “define the airspace around aerodromes to be maintained free from obstacles so as to permit the intended aeroplane operations at the aerodromes to be conducted safely and to prevent the aerodromes from becoming unusable by the growth of obstacles around the aerodromes.”
Correction in Balked Landing Definition:
Apologies for the error made while describing balked landing, where the term abandoned takeoff was used which should be abandoned landing.
The correct definition for balked landing is :
A Balked Landing, sometimes referred to as a Rejected Landing, is a low energy go-around initiated after the decent of the aircraft to a very low height above the runway i.e. the decision height.
Hope you enjoy this video.
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I have been transferred to Delhi HQ Planning department and this video is very useful for me and other persons who are beginners in aviation.
Gald to know !! Wishing you the very best :)
My weakest chapter in Annex 14 ... Many things cleared but still needs more knowledge.. Thanks
A good initiative to explain the compliances with respect to height restrictions in funnel area
Where complications get simplified...Good attempt...
If all these are to be known, conceived and followed by the Pilots, then it's really a tough job and hats off to them...
You people did a great job.. and well explained. Paper pieces are making your explanation tougher
Nice! Interesting subject, Hats off👏👏👏👏
Thank you :)
Value of "m" in Transitional sub-section...
14.3%=1:7
If 1=45
Then 7=x... by cross multiplying x=45×7
x=315m (Answer)
What should be the calculation for conical surface? Thanks.
@@muhammadsultanularafin8846 the slope of conical surface is 5% i.e, 2100*5% =105M
2100 kaha se ?? muje tu oper M ki calculation or aap ki bilkul samj nahi ayii.
Good initiative.
Nicely covered thanx
Very well explained, simplified the subject
I have never seen a video like you guys explained. Thank you for clearing my douth. good job both of you try to make more video for better understanding such as like Low Visibilty producer / adverse weather condition Etc. ..
I work in an airport. Your vedios are great and educational. Keep it up
A proper approach...
Keep up the good job 🙂
Excellent explanation.....
amazing explanation and im still watching it
Good guide
Very well explained.
All doubts cleared, salute to u guys.
Thanks a lot. Good going.
Excellent learning experience!
Very well explained.. Thanks
Fantastic explanation
Explained very clumsy topic with so much ease 🙏🙏🙏
shukria khush rahee...
Thank you so much. You guys explained it so well.
Well explained
Beautiful
such a good explanation of OLS! i thanks a lot
Well done 👍🏻
Very nice, both of you explane OLS very well, thank you
Good concept
Well explained. Cheers guys. Please keep on sharing more content on ICAO 🥂👏
Very nice mam.
Best video for explaining OLS🙏🙏🙏.
I will share this video among other ATC Trainees in my batch to improve their understanding of OLS.
Very well explained the complex surfaces around an aerodrome. Best wishes to you all beginning with your career in aviation.
Thank you sir
A very comprehensive and good video on the topic
Glad it was helpful!
Good job , highly helpful
Thankyou
A short video of only 16 mins explains one of the most complex topic field in aviation. The props are used appropiately and the explaination is too the point.
This also clears my doubt that why runway strip is 140m.
Well done. Keep posting new ones
Thank you
Please let us know any other topic you would like.us to discuss
😍😍😍😍 thank you!
You're welcome 😊
The last part would be 13400..
Becoz now a days outer horizontal surface is to be considered as 20Km.
Plz clear my doubt on this fact..
Well explained about this topic...
Well done 👍
The Outer Horizontal Surface shall extend to 15000 meters from the Aerodrome Reference Point for Aerodrome with runway code 3 and 4. In case of Aerodrome with runway Code 2, the Outer Horizontal Surface shall extend to 14740 meters from Aerodrome Reference Point for Instrument runways and 13740 meters for Non Instrument runways. Where combined Outer Horizontal Surface is established for two Aerodromes, the Outer Horizontal Surface shall be centered on the Aerodrome Reference Point of the Aerodrome of higher category. Outer Horizontal Surface for Aerodrome with runway code No.1 shall not be established.
Hope this is of some help in clarifying your doubt.
Thankyou ❤
My doughts are cleaned..
❤🎉
Great explanation. If possible please make the video on Attachment A of annex 14 volume. Approach pole height slope of rising and falling ground
Noted! Added to our to do list!
Thank you
Hi,
The height of the conical surface is 300 m and extended up to a distance of 9100 m from the runway end at 5%
Yes absolutely this will be inclusive of the outer conical surface that extends above the conical surface.
SUBSCRIBED Madamji
Very useful video …. But can u clarify how d obstruction height is determined ie… if a antenna is to be placed 1000 mtrs from rwy centre line …. What is d maximum height of obs…. And is there is any formula….
1000mtrs. Which side of the runway sir?
@@aviationavi7532 Sir let it be any side … other than approach and departure path
If this is the case then the governing surface is Transition surface with a slope of 14.3% or 1/7 (one in height and seven in length), which allows a height of 123 m approx but since the other surface named as Horizontal Surface restricts the actual height to be 45m only. Till 4000m from the reference points
@@aviationavi7532 Thanks sir….
Aap log kaha the ab tak❤️👌👌👌💯⚡️
Hi thank you very much for your videos
Please share the requirement of OLS for runway Type 2-B
Wow! The best video regarding the subject. One thing, if a runway end (say rwy-14) used both for landing and take off, should we consider approach surfaces or take off climb surface or both? Thank you in advance.
Yes if both the runways are in use..then both sides will have..OLS accordingly
Transitional Surface's distance from strip or M=315
Thanks a lot for covering this topic. Can you draw these surfaces on google earth. Especially approach funnel with 15 percent divergence if possible
We will try to do it..in future
Some aerodrome's ARP coordinates are not align to the mid point of runway CL (geometric centre of landing area) as we have two runway in use.
In this case, which one we should consider as a reference to draw a radius of 15,000m for OHS?
Established ARP again or Mid point of runway CL?
I hope you can clear my doubt.
Thanks,
The Outer Horizontal Surface shall extend to 15000 meters from the Aerodrome Reference Point for Aerodrome with runway code 3 and 4. In case of Aerodrome with runway Code 2, the Outer Horizontal Surface shall extend to 14740 meters from Aerodrome Reference Point for Instrument runways and 13740 meters for Non Instrument runways. Where combined Outer Horizontal Surface is established for two Aerodromes, the Outer Horizontal Surface shall be centered on the Aerodrome Reference Point of the Aerodrome of higher category. Outer Horizontal Surface for Aerodrome with runway code No.1 shall not be established.
Hope this is of some help in clarifying your doubt.
@@anweshapal8480 I really appreciated your hardwork and Thank you for helpful reply.
Please make video on critical and senaitive area of ILS LLZ and GP
Coming soon ☺️
At 14:17 is it 1800 mtr
I think it shall be 180 mtr as written on screen also
Hi there A 34m tower near 200 m side runway is there any issue with cod 4 or 3 one?
M = 315 m approx.
I must say I am in the field of Aviation and you all are extremely good at OLS/AGA surfaces. In the 15:45 , the Transition surface extended beyond Conical Surface. In which situation was this surface used. Can you send the reference here.
can u pl upload video in higher quality.
Dear Sir/Madam, Have observed that all Type A charts issued by AIP India for all kind of aerodromes like code 2,3,4 aerodrome s have takeoff funnel with same dimensions as:
1. Inner edge = 180 m
2. Divergence =12.5%
3. Length = 15000 m
3. Outer edge = 1800 m
Why it is like that, actually above dimensions are for code 3 & 4 and for code 2 there exists different dimensions for takeoff Climb surface. Still for every aerodromes same dimensions are used . Can you do a video on this topic, explaining why?
Hey, that's a great observation!
These surfaces are many a times designed based on the master plan for the aerodrome. Based on the plan for expansion to Code 3 or 4 for a runway which is lets say Code 2 presently, the OLS for the runway is defined with respect to Code 3 or 4 runway to avoid complications in upcoming stages.
thank you for these explanations, I have a Question, in the case of a DTHR, the definition of these surfaces must be based on DTHR or THR?
All these are in accordance with DTHR because, Displaced Threshold is the only declared distance, if not then it has to be omitted from the Rwy Surface
Can u make a video on Basic ILS Surface
Please Name the surfaces you want to be explained we will surely come with a solution
Can you explain why the inner transitional surface start from 60M for Code E and 75M for Code F
Just one liner explaination is not possible as these value came after a lot of research work..not with the aircrafts only but also with the improvements with ground equipments (DME LLZ, PAPI, etc)..hope you understand.
Sir i think the inner edge of approach is 300M instead of 280M
314. 6 M
which organization you both belong to I see a BCAS pass.....
5:30 OUTER horizontal surface ki width/length ??? please
315
M=315.68
When you say "Reference Point", do you mean the Runway Threshold (black and white lines at the end), rather than the Aerodrome Reference point (Which is the midpoint of the aerodrome)?
1. Reference points are marked on the diagram and these are generally taken as physical ends/beginning of the runway not the Threshold.
2. ARP is not the reference point.
@@aviationavi7532 Thank you for responding. Reference Points = End of the runways. Got it. Thank you.
How inner transitional surface starting from 60 metre for code E and 70 metre for code F . Explaination given in annex-14 is very hard to understand. Anyone can clarify please
Please quote the explanation from Annex 14, so that we can make out the correct answer for your query
45/0.143=315
Correct
Thx, Why you don't explain what is the reference point ? 😢
Reference point is a datum decided by airport operator and it can be changed if required as per the requirements
Please help me with my calculation
I tried to find the solution also from the other end - which should work, but why did I get a wrong answer?
Appr and Transitional intersect the inner horizontal at 45 m so since appr slope is 2% as you had in the picture as well at 2250m the appr slope reaches the 45m. By then since its divergence is 15% it will have extended 337.5m to the side. Since this is the point where the transitional started it would mean m the distance from the strip has to be 337.5m as well but this then would give you an angle of 13.33%.
Obviously wrong but where is the mistake in this calculation?
Since all surfaces are connected it has to be possible to find the solution like this as well.
Hope you can help
I guess you have assumed "m" as the wrong entity. The "m" written close to 2250 is the unit of the value depicting meters.
Please comment down if the problem persists.
Outer horizontal surface ki limits kitni hai??
Extends to 15km from ARP and you can picture it as a surface covering the Conical Surface.
M=42.66 m
Is it correct?
We appreciate your efforts in calculating the answer, but the correct answer is M=315 m
☺️ Promo'SM!!
Well explained.. thank you