NavList:

Dave,

Martelli works as a sight reduction method by providing a longitude for the DR latitude which becomes a Sumner point of the LOP. The LOP is gotten by adding 90 degrees to the azimuth which is then plotted through the Sumner point. This method is something I became aware of only recently. There is no mention of this in Bowditch.

Greg Rudzinski

[NavList] Re: Martelli's Time-Sight Tables
From: Dave Walden
Date: 26 Dec 2012 16:06
While many posts refer to use of Martelli's tables for time sight reduction, others just say sight reduction; I don't recall any mention of this publication and the use of the Martelli tables for line of position:

Martelli's Navigational Tables: A Rapid Method of Finding the Position Line and for Solving Spherical Triangle Problems

There are a number of USNI letters describing "how-to" that may have, in fact, led to the above publication.
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