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    Table 8, Bowditch
    From: Ark Shvetsky
    Date: 2009 Jan 12, 22:47 -0800

    Greeting,
    
    I'm trying to understand why for calculating the approximate radar range at 
    which any given target will return an echo-it is suggested that Bowditch 
    Table 8 can be used with the distances increased by 4-5%% to allow for the 
    slight curvature of radar waves over the geometric horizon but that provision 
    is apparently not used for the visible horizon calc?
    
    Or the answer is the formulas: for radar 1.22 Sq.Rt of H
    for visible horizon 1.15 Sq.Rt of H
    
    
    I think the light refraction is affecting the distance to the visible horizon, 
    so why 4-5% is added to radio waves?
    
    
    Ark
    
    
    
    
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