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Re: Bowditch tables 12 and 13
From: Bill B
Date: 2012 Aug 15, 22:37 -0400
From: Bill B
Date: 2012 Aug 15, 22:37 -0400
On 8/15/2012 9:07 AM, Jeremy C wrote: > I'm sorry to say that I can't tell you how the formuala is derived. i'm > just a humble sailor who knows where to find the formula I need to get > work done, but not all that much about the mathmatics behind them. > > I don't know where the .06 factor comes from as geometric horizon would > seem to me to be a straight line tangent to the curve of the earth. > I understand your position and trust your knowledge. At the moment I don't want to delve into how the 1.06 was arrived at, I just need to know how to apply it, so I'll restate the question. If I use the Table 12 formula to arrive at distance to horizon, that distance is along the surface (circumference) of the earth. If I want to solve for straight-line distance from eye to horizon, do I multiply the Table 12 distance by 1.06, or divide it by 1.06? Bill B
