CS ADR-DSN.Q.851 Marking and lighting of wind turbines

• ED Decision 2016/027/R found in: Aerodromes (139/2014) Part-ADR.AR Part-ADR.OR Part-ADR.OPS CS-ADR-DSN CS-HPT-DSN (Jun 2023)

CS ADR-DSN.Q.851 Marking and lighting of wind turbines ED Decision 2016/027/R (a) Applicability: When considered as an obstacle a wind turbine should be marked and/or lighted. (b) Marking: The rotor blades, nacelle and upper 2/3 of the supporting mast of wind turbines should be painted white, or if after a safety assessment, it is determined that other colour will improve safety. (c) Lighting: (1) Where lighting is deemed necessary for a single wind turbine or short line of wind turbines, the installation should be in accordance with paragraph (c)(2)(v) below, or as determined by a safety assessment. (2) When lighting is deemed necessary in the case of a wind farm (i.e. a group of two or more wind turbines), the wind farm should be regarded as an extensive object and lights should be installed: (i) to identify the perimeter of the wind farm; (ii) respecting the maximum spacing, in accordance with [CS ADR-DSN.Q.846(i)](#_DxCrossRefBm1800047824), between the lights along the perimeter, or if after a safety assessment, it is determined that a greater spacing can be used; (iii) so that, where flashing lights are used, they flash simultaneously throughout the wind farm; (iv) so that, within a wind farm, any wind turbines of significantly higher elevation are also identified wherever they are located; and (v) at locations prescribed in (i), (ii) and (iv): (A) for wind turbines of less than 150 m in overall height (hub height plus vertical blade height), medium intensity lighting on the nacelle; (B) for wind turbines from 150 m to 315 m in overall height, in addition to the medium intensity light installed on the nacelle, a second light serving as an alternate should be provided in case of failure of the operating light; the lights should be installed to assure that the output of either light is not blocked by the other; (C) in addition, for wind turbines from 150 m to 315 m in overall height, an intermediate level at half the nacelle height of at least three low intensity Type E lights, as specified in [CS ADR-DSN.Q.846(c)](#_DxCrossRefBm1800047824), that are configured to flash at the same rate as the light on the nacelle; low-intensity Type A or B lights may be used if an safety assessment shows that low intensity Type E lights are not suitable. (3) The obstacle lights should be installed on the nacelle in such a manner as to provide an unobstructed view for aircraft approaching from any direction. [Issue: ADR-DSN/3] CS ADR-DSN.Q.851 Marking and lighting of wind turbines ED Decision 2016/027/R (a) Applicability: When considered as an obstacle a wind turbine should be marked and/or lighted. (b) Marking: The rotor blades, nacelle and upper 2/3 of the supporting mast of wind turbines should be painted white, or if after a safety assessment, it is determined that other colour will improve safety. (c) Lighting: (1) Where lighting is deemed necessary for a single wind turbine or short line of wind turbines, the installation should be in accordance with paragraph (c)(2)(v) below, or as determined by a safety assessment. (2) When lighting is deemed necessary in the case of a wind farm (i.e. a group of two or more wind turbines), the wind farm should be regarded as an extensive object and lights should be installed: (i) to identify the perimeter of the wind farm; (ii) respecting the maximum spacing, in accordance with [CS ADR-DSN.Q.846(i)](#_DxCrossRefBm151830962), between the lights along the perimeter, or if after a safety assessment, it is determined that a greater spacing can be used; (iii) so that, where flashing lights are used, they flash simultaneously throughout the wind farm; (iv) so that, within a wind farm, any wind turbines of significantly higher elevation are also identified wherever they are located; and (v) at locations prescribed in (i), (ii) and (iv): (A) for wind turbines of less than 150 m in overall height (hub height plus vertical blade height), medium intensity lighting on the nacelle; (B) for wind turbines from 150 m to 315 m in overall height, in addition to the medium intensity light installed on the nacelle, a second light serving as an alternate should be provided in case of failure of the operating light; the lights should be installed to assure that the output of either light is not blocked by the other; (C) in addition, for wind turbines from 150 m to 315 m in overall height, an intermediate level at half the nacelle height of at least three low intensity Type E lights, as specified in [CS ADR-DSN.Q.846(c)](#_DxCrossRefBm151830962), that are configured to flash at the same rate as the light on the nacelle; low-intensity Type A or B lights may be used if an safety assessment shows that low intensity Type E lights are not suitable. (3) The obstacle lights should be installed on the nacelle in such a manner as to provide an unobstructed view for aircraft approaching from any direction. [Issue: ADR-DSN/3] #### CS ADR-DSN.Q.851 Marking and lighting of wind turbines *ED Decision 2016/027/R* (a) Applicability: When considered as an obstacle a wind turbine should be marked and/or lighted. (b) Marking: The rotor blades, nacelle and upper 2/3 of the supporting mast of wind turbines should be painted white, or if after a safety assessment, it is determined that other colour will improve safety. (c) Lighting: (1) Where lighting is deemed necessary for a single wind turbine or short line of wind turbines, the installation should be in accordance with paragraph (c)(2)(v) below, or as determined by a safety assessment. (2) When lighting is deemed necessary in the case of a wind farm (i.e. a group of two or more wind turbines), the wind farm should be regarded as an extensive object and lights should be installed: (i) to identify the perimeter of the wind farm; (ii) respecting the maximum spacing, in accordance with [CS ADR-DSN.Q.846(i)](#_DxCrossRefBm1262885401), between the lights along the perimeter, or if after a safety assessment, it is determined that a greater spacing can be used; (iii) so that, where flashing lights are used, they flash simultaneously throughout the wind farm; (iv) so that, within a wind farm, any wind turbines of significantly higher elevation are also identified wherever they are located; and (v) at locations prescribed in (i), (ii) and (iv): (A) for wind turbines of less than 150 m in overall height (hub height plus vertical blade height), medium intensity lighting on the nacelle; (B) for wind turbines from 150 m to 315 m in overall height, in addition to the medium intensity light installed on the nacelle, a second light serving as an alternate should be provided in case of failure of the operating light; the lights should be installed to assure that the output of either light is not blocked by the other; (C) in addition, for wind turbines from 150 m to 315 m in overall height, an intermediate level at half the nacelle height of at least three low intensity Type E lights, as specified in [CS ADR-DSN.Q.846(c)](#_DxCrossRefBm1262885401), that are configured to flash at the same rate as the light on the nacelle; low-intensity Type A or B lights may be used if an safety assessment shows that low intensity Type E lights are not suitable. (3) The obstacle lights should be installed on the nacelle in such a manner as to provide an unobstructed view for aircraft approaching from any direction. [Issue: ADR-DSN/3]