NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: True vs Magnetic
From: Bill Murdoch
Date: 1999 Jul 19, 8:03 PM
From: Bill Murdoch
Date: 1999 Jul 19, 8:03 PM
In a message dated 7/18/99 12:19:28 PM EST, lu.abel@ATT.NET writes: > PS - Does anyone know how to calculate leeway (for either power or sail)? Some time ago I wrote myself a note, "for modern sailing hulls: Leeway = 58.5 * heel angle in degrees / boat speed in knots cubed, Ocean Navigator #45 3/92 page 72. It makes sense that increasing heel would indicate increasing leeway and that lower speeds would indicate higher leeway, but the numbers do not seem to fit. Does anyone have the back issue to see if I wrote the formula correctly ? My own experience is that sea state also has a big effect. Bill Murdoch
