How to identify Obstacle Limitation Surfaces of an Aerodrome?

[@the0oo0ne]

Finally after long time.....
Thank you so much Dr. For this creative explaining

[@hughvera3569]

i would like to see this item in autocad version

[@maldhubeiban3115]

Do it again please with high quality resolution

[@AkkuOfficial4771]

Good explanation Sir.... 3d

[@rankita021]

Good, but you have to explain it in a better and confident way. The recording should be HD

[@airfieldlighting]

@rankita021 Good suggestion 👌 shall be implemented