NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Set and drift
From: Bill B
Date: 2006 May 19, 16:42 -0500
Robert wrote:
> I calculate the course made good by actually plotting a vector on my
> chart or plotting sheet. I use the latitude scale to represent the
> drift and the compass rose for the set. Does anyone do it
> mathematically in practice?
I do play with it mathematically using the law of sines and cosines rather
than the 4 sets of formulas set forth in texts. In practice I generally use
a plotting sheet, and may transfer the results to a chart. Less wear and
tear on the chart. The math is much harder on board than it is on the dining
room table, and is always sanity checked against a sketch anyway. The
affect of a blunder is pretty harmless at the dining room table ;-)
Bill
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From: Bill B
Date: 2006 May 19, 16:42 -0500
Robert wrote:
> I calculate the course made good by actually plotting a vector on my
> chart or plotting sheet. I use the latitude scale to represent the
> drift and the compass rose for the set. Does anyone do it
> mathematically in practice?
I do play with it mathematically using the law of sines and cosines rather
than the 4 sets of formulas set forth in texts. In practice I generally use
a plotting sheet, and may transfer the results to a chart. Less wear and
tear on the chart. The math is much harder on board than it is on the dining
room table, and is always sanity checked against a sketch anyway. The
affect of a blunder is pretty harmless at the dining room table ;-)
Bill
--~--~---------~--~----~------------~-------~--~----~
To post to this group, send email to NavList@fer3.com
To , send email to NavList-@fer3.com
-~----------~----~----~----~------~----~------~--~---
