GM2 MET.TR.210(c)(3) Observing meteorological elements

• ED Decision 2022/004/R found in: ATM/ANS Provision of Services (2017/373) (Feb 2023)

GM2 MET.TR.210(c)(3) Observing meteorological elements ED Decision 2022/004/R RUNWAY VISUAL RANGE (RVR) Instrumented systems based on transmissometer or forward-scatter meters must be used to assess RVR on runways intended for Categories II and III instrument approach and landing operations. For Category I instrument approach, other means to assess RVR exist and the assessment of RVR by means of instrumented systems based on transmissometer or forward-scatter meters are therefore not required. However, if the competent authority considers that an instrument system is required at certain aerodromes, it may decide so. Therefore, the requirement in [MET.TR.210(c)(2)](#_DxCrossRefBm1726555807) provides this option, which is consistent with the ICAO Annex 3 approach. GM2 MET.TR.210(c)(3) Observing meteorological elements ED Decision 2022/004/R RUNWAY VISUAL RANGE (RVR) Instrumented systems based on transmissometer or forward-scatter meters must be used to assess RVR on runways intended for Categories II and III instrument approach and landing operations. For Category I instrument approach, other means to assess RVR exist and the assessment of RVR by means of instrumented systems based on transmissometer or forward-scatter meters are therefore not required. However, if the competent authority considers that an instrument system is required at certain aerodromes, it may decide so. Therefore, the requirement in [MET.TR.210(c)(2)](#_DxCrossRefBm647742987) provides this option, which is consistent with the ICAO Annex 3 approach.