Layer: Airport Obstacle Limitation Surface (ID: 185)

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Name: Airport Obstacle Limitation Surface

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Description: <DIV STYLE="text-align:Left;"><DIV><DIV>Height difference between ground and Obstacle limitation surface (OLS) bandedin to 10m bandsThe Site to Which the Requirement Applies is as Follows:Airspace above Rotorua Airport and part of the surrounding Rotorua district (as more particularly detailed in Planning Map 208 and Figures 3 and 4).The height restrictions used in this notice are based on Civil Aviation Authority (“CAA”) Rule part 139.51 and the associated Advisory Circular AC 139-06A “Aerodrome Design – Aeroplanes above 5,700kg” specifications for OLS applicable to code 4C aircraft operating from an instrument non-precision runway. All elevations are provided in metres above mean sea level (“AMSL”) unless otherwise stated.Note: The CAA uses a coding system that defines the airport operational requirements for aircraft based on their size and takeoff performance. Under this system the Boeing 737 and Airbus A320 are defined as code 4C aircraft.It is proposed to extend the existing sealed runway (1622m long x 30m wide) by a total of 487m to the south, including a 122m starter extension to be used only for takeoff to the north and 145m of sealed runway to be used only for landing from the north and take-off. In addition it is proposed to extend the existing sealed runway by a total of 150m to the north, including a 130m starter extension to be used only for takeoff to the south and 20m of sealed runway to be used only for landing from the south and take-off.For the purpose of determining the scope and extent of the airspace controls an overall runway length of 2259m including starter extensions has been adopted. The runway identification is 18/36, runway 18 being for takeoffs to the south and landings from the north, and runway 36 the opposite. A grass runway running parallel to the main runway and 833m x 50m has the same identification.2. Description of the Activity is:The designation shall be for all operational aspects of the Rotorua Regional Airport (“Airport”) including operations on the expanded Airport area authorised by the Rotorua District Council Designation 1; and airspace protection in the vicinity of the Airport, by defining essential obstacle limitation surfaces (“OLS”) for the protection of aircraft flight paths. (Figures 3 and 4 show these surfaces in plan view). The operations authorised by this designation are operations on the existing runway and future runway extensions, and provision of all infrastructure associated with the Airport including buildings, drainage navigational aids and lighting, within the areas shown on the Figure titled - Rotorua Airport Plan of Development. Ancillary aviation related uses of the buildings are for recreation, conference and function purposes but excludes visitor accommodation.CAA rule part 139.51 requires an airport operator to provide OLS around the airport to ensure the safe operation of aircraft approaching and departing the airport. This is done by means of height controls based on a series of geometric surfaces projecting up from the edges of the strip which surrounds the sealed runway, the intention being to prevent structures and trees from penetrating these surfaces in areas critical to operational safety and efficiency.CAA Advisory Circular AC 139-06A provides details on the extent of the OLS. The surfaces adopted for Rotorua Regional Airport are for an instrument non-precision runway able to accommodate aircraft up to Code 4C in size.This requirement protects Rotorua Airport from possible intrusion of over-height obstacles into the necessary approach and take-off areas required for the safe operation of the airport by all types of aircraft in use, or expected to be in use, at the airport in recognition of its role as an integral part of the national aviation infrastructure.A ‘user-friendly’ explanatory guide as to how these height controls work in practice is attached at the end of this designation.3. Height RestrictionsHeight restrictions will apply to objects including buildings, structures, masts, poles and trees under the Airport Approach And Take-Off Obstacle Limitation Surfaces as described below.4. Runway, strip and OLS inner edgesThe main runway is to be extended to the north by a total of 150m, which includes a 130m starter extension and 20m of sealed runway that is only available for takeoff on runway 18, landing on runway 36 and take-off. The main runway is also to be extended to the south by a total of 487m, which includes a 122m starter extension and 365m of sealed runway that is only available for takeoff on runway 36, landing on runway 18 and take-off.The runway will be contained within a rectangular strip with edges 75m either side of and parallel to the runway centreline. For the purpose of this NOR, the strip ends are co-incident with the OLS inner edge locations at each end of the runway.The take-off and approach OLS commence from an “inner edge” that crosses the runway centreline at right angles at the following survey locations:<TABLE><TBODY><TR><TD></TD><TD>Northing m</TD><TD>Easting m</TD><TD>AMSL m</TD></TR><TR><TD>North end inner edge</TD><TD>662193.69</TD><TD>287211.57</TD><TD>284.81</TD></TR><TR><TD>South end inner edge</TD><TD>660415.16</TD><TD>286383.14</TD><TD>286.00</TD></TR></TBODY></TABLE>Note: Survey co-ordinates are referenced to the Bay of Plenty (49) circuit.5. Northern Take-off OLS There are two northern takeoff paths and two corresponding takeoff OLS.Both takeoff OLS commence at the north end inner edge location. The surface edges commence at each end of the inner edge, located 90m either side to the runway centreline and rise at a gradient of 2.0% (1:50) over a horizontal distance of 15,000m.a. Turning Take-off (Figure 3 path 7a)The surface edges diverge from each end of the inner edge at a rate of 12.5% (1:8) to a final width of 1800m (900m either side of the surface centreline).The surface centreline follows the extended runway centreline north to a point 1,716m from the inner edge. At this point the surface steps down 4.6m in height and its centreline commences a left turn of radius 1,620m through an arc of 80 degrees. The surface centreline then steps up 4.6m and continues straight for a further 11,022m to a total distance of 15,000m from the inner edge measured along the surface centreline.b. Straight-ahead Take-off (Figure 3 path 8a)The surface edges diverge from each end of the inner edge at a rate of 12.5% (1:8) to a final width of 1200m (600m either side of the surface centreline). The surface centreline follows the extended runway centreline over its full 15,000m length.6. Northern Approach OLSThere are two northern approach paths and two corresponding approach OLS.Both approach OLS commence at the north end inner edge location. The surface edges commence at each end of the inner edge, located 75m either side of the runway centreline.a. Straight-in Approach (Figure 3 path 10a)The straight-in approach surface from the north commences at the inner edge and rises at a gradient of 2.0% (1:50) over a horizontal distance of 15,000m.The surface edges diverge from each end of the inner edge at a rate of 15.0% (1:6.6) to a final width of 4,650m (2325m either side of centreline).The surface centreline follows the extended runway centreline over its full 15,000m length. b. Curved Approach (Figure 3 path 9a)The curved approach surface from the north commences at the inner edge and rises at a gradient of 2.5% (1:40) over a horizontal distance of 3,243m, extending to the edge of the lakeshore. The surface edges diverge from each end of the inner edge at a rate of 10% (1:10) to a final width of 799m.The surface centreline follows the extended runway centreline to a point 1,716m from the inner edge. At this point the surface centreline commences a left turn of radius 1,067m through an arc of 82 degrees at which point the surface ends. 7. Southern Take-off OLS (Figure 3 path 2b)The southern take-off OLS commences at the south end inner edge and rises at a gradient of 2.0% (1:50) over a horizontal distance of 15,000m. The surface edges commence at each end of the inner edge, located 90m either side of the runway centreline.The surface edges diverge from each end of the inner edge at a rate of 12.5% (1:8) to a final width of 1,800m (900m either side of the surface centreline).The surface centreline follows the extended runway centreline south to a point 946m from the inner edge. At this point the surface steps down 4.6m in height and its centreline commences a right turn of radius 2,480m through an arc of 185 degrees. The surface centreline then steps up 4.6m and continues straight for a further 6,046m to a total distance of 15,000m from the inner edge measured along the surface centreline.8. Southern Approach OLS There are two southern approach paths and two corresponding approach OLS.Both approach OLS commence at the south end inner edge. The surface edges commence at each end of the inner edge, located 75m either side to the runway centreline.a. Straight-in Approach (Figure 3 path 4b)The straight-in approach surface from the south commences at the inner edge and rises at a gradient of 2.0% (1:50) over a horizontal distance of 15,000m. The surface edges diverge from each end of the inner edge at a rate of 15.0% (1:6.6) to a final width of 4,650m (2,325m either side of centreline). The surface centreline follows the runway extended centreline to a point 1,318m from the inner edge. At this point the surface skews 14°59’ to the west of the extended runway centreline (effectively a clockwise rotation of 14°59’) and continues straight for a further 13,682m. b. Curved Approach (Figure 3 path 6b)The curved approach surface from the south commences at the inner edge and rises at a gradient of 2.5% (1:40) over a horizontal distance of 9,109m, extending to the edge of the lake shore. The surface edges diverge from each end of the inner edge at a rate of 10% (1:10) to a final width of 1,972m.The surface centreline follows the extended runway centreline to a point 1,318m from the inner edge. At this point the surface centreline commences a right turn of radius 2,480m through an arc of 180 degrees. 9. Transitional Side Surface (Figure 4)The transitional side surface extends from the side of the strip upwards and outwards at a gradient of 1:7 until it reaches the inner horizontal surface. North of the inner edge location, the transitional side surface extends to meet the outer edge of the straight-in approach path 10a OLS such that the outer edge of the side surface meets the outer edge of path 10a OLS 2,250m from the inner edge, measured along the centreline of path 10a.10. Inner Horizontal Surface (Figure 3)The inner horizontal plane is located at a height of 330m above mean sea level (45m above the runway reference height) and extends out to a distance of 4,000m measured from the periphery of the runway strip.11. Conical Surface (Figure 3)The conical surface slopes upward and outward from the periphery of the inner horizontal surface rising at a gradient of 5.0% (1:20) to a height of 435m AMSL (150m above the runway reference height).Note: The inner horizontal and conical surfaces are penetrated by terrain and existing trees and structures predominantly to the south and east of the runway. RRAL, at its discretion, may permit further penetration of the surfaces by trees and structures in this area.</DIV></DIV></DIV>

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