Don Casey - Dragged Aboard Storm Tactics Handbook:
Modern Methods of Heaving-To for Survival in Extreme Conditions
by Lin Pardey and Larry Pardey


      

Other books by Lin and Larry Pardey
| Home | Mailing Lists | Bookstore | Weather | Tide Predictions | Bowditch |

Re: dip, dip short, distance off with buildings, etc.

From: Dan Allen (no email)
Date: Thu Jan 05 2006 - 21:59:13 EST

  • Next message: Ken Muldrew: "Re: Green Flash and Longitude"

    On 5 Jan 2006, at 6:44 PM, Frank Reed wrote:

    > This works perfectly to derive the equations in Bowditch for dip,
    > dip short,
    > Table XV, and apparently everything else where terrestrial
    > refraction is
    > involved. Details upon request...

    I too would like to see your derivation and thinking explained a bit
    more.

    Are you saying that this approximation is sufficient to reproduce the
    tables, or are you saying that this is exactly equivalent to the
    tables? What about all of the layers of the atmosphere and Snell's
    law? Can Euclidian geometry and a simple linear factor really be
    sufficient?

    Dan


  • Next message: Ken Muldrew: "Re: Green Flash and Longitude"



    | Home | Mailing Lists | Bookstore | Weather | Tide Predictions | Bowditch | Trawlerworld |