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6 Range of Lights - Coggle Diagram

- - - - Not where I anticipated it to be
      - Light is unlit or obscured
      - Poor visibility
- - - - Maximum distance a light become visible
  - - - Use the lowest
      - Meteorological visibility >= 10MN
  - - - Only
        
        Luminous Range GREATER than Geographical Range
- - - - Elevation of light
      - Eye of Observer
- - - - fórmula de Allard
      - Considera
        
        Período noturno
        
        Vista desarmada
        
        Ausência de luzes de fundo
        
        Coeficiente de Transparência Atm 0,85
        
        Visibilidade meteorológica 18,4MN