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    Aquino's Method
    From: Dave Walden
    Date: 2009 Jun 23, 08:27 -0700

    Aquino's was among the early "short" or "inspection" tabular methods.  His 
    method is described in an article he wrote for the U S Naval Institute 
    Proceedings, "Altitude and Azimuth Tables for Facilitating the Determination 
    of Lines of Position and Geographical Position at Sea", Oct 1908, Vol 34, pg 
    He divides the triangle, avoiding log-natural and addition issues.  Both 
    assumed latitude and longitude are carefully chosen so that Hc and Z are used 
    directly from adjacent columns in his table.
    (Also of interest in the above volume is another Aquino article, "Nomograms 
    for Deducing Altitude and Azimuth", pg 633)
    His tables, "The 'Newest' Navigation Altitude and Azimuth Tables for 
    Facilitating the Determination of lines of Position and Geographical Position 
    at Sea", 1918, Potter (London), are available on line as:
    His tables from the above were added to HO 171, "Altitude, Azimuth, and Line 
    of Position", making it HO 200 (see attached).  Available on line as:
    This seems to have been the first publication by HO of a "short" or "inspection" tabular method.
    The attached spreadsheet generates his table and implements his "first" method 
    from HO 200.  I find that being "forced" to tell the computer explicitly how 
    to implement a method significantly increases my understanding.  No guarantee 
    on the spreadsheet, but it seems to be working.
    (Been using a new plotter, "Le vrai rapporteur BRETON".  Seems nice.)
    Navigation List archive: www.fer3.com/arc
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