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A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Table 8, Bowditch
From: Ark Shvetsky
Date: 2009 Jan 12, 22:47 -0800
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 --~--~---------~--~----~------------~-------~--~----~ Navigation List archive: www.fer3.com/arc To post, email NavList@fer3.com To , email NavList-@fer3.com -~----------~----~----~----~------~----~------~--~---
