Aerodrome Certification Obstacles Control Eng Mohamed Iheb Hamdi

Aerodrome Certification : Obstacles Control Eng. Mohamed Iheb Hamdi ICAO MID Regional Officer for Aerodromes and Ground Aids (AGA Aerodrome Certification Workshop Paris, France 18 -20 Dec 2018

OLS : Obstacles Limitation Surfaces The take-Off Climb Surface Inner Horizontal Surface Conical Surface Transitional Surface The approach Surface 2 27 February 2021 Footer 2

Obstacles 27 February 2021 Footer 3

OLS § Inner horizontal Surface and Conical Surface § § Approach and Transitional Surfaces § § To protect airspace for visual circling prior to landing Define the volume of airspace which should be kept clear of obstacles to protect the aircraft in the final phase of the Approach-to-Land Manoeuvre Take-Off Climb Surface § Provide protection for aircraft taking off with respect to obstacles 4 27 February 2021 Footer 4

OLS: Design (Example Code 4 _ PAPP) C Transitional Surface Runway Strip C Approach Surface H Slope =14. 3% Runway Strip 27 February 2021 C-C D = H / Slope Footer 5

OLS: Design (Example Code 4 _ P-APP) Inner horizontal Surface F r Transitional Surface F Inner horizontal Surface 27 February 2021 Runway Strip F-F Footer 6

OLS: Design (Example Code 4 _ P-APP) Conical surface T T Inner horizontal Surface Slope= 5% Transitional Surface 27 February 2021 Footer T-T Conical Surface 7

OLS: Design (Example Code 4 _ P-APP) Approach Surface Divergence = 15 % Bande 1 st section 2 nd section Horizontal Section Slope 2=2, 5% H 2 Slope 1=2% H 1 D 1 27 February 2021 H 1 = D 1 * slope 1 H 2 = D 2 * Slope 2 D 2 H 3 = H 1 + H 2 B-B Footer 8

OLS: Design (Example Code 4 _ P-APP) Take Off climb surface Divergence=12. 5 % Runway Strip H = D * Slope H Slope= 1. 6 % A-A 27 February 2021 D Footer 9

OFZ: Obstacle Free Zone 10 27 February 2021 Footer 10

OFZ – Obstacle free Zone § OFZ composed of: § § § Inner Transitional Surface (ITS) Balked Landing Surface Inner Approach Surface § Surfaces intended to protect aeroplanes from fixed or mobile obstacles during category I, II or III operations when approaches are continued below decision height and during any subsequent missed approach or balked landing with all engines operating normally, § It is not intended to supplant the requirement of other surfaces or areas where these are more demanding 11 27 February 2021 Footer 11

Outer Horizontal Surface Some States Mandate a further surface : The Outer Horizontal Surface with extends from the periphery of the conical surface to a radius of 15, 000 m from the aerodrome reference point 12 27 February 2021 Footer 12

Outer Horizontal Surface 13 27 February 2021 Footer 13

27 February 2021 Aerodrome Certification Workshop 14