A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Position-Finding
From: Herman Dekker
Date: 2018 Sep 9, 23:23 -0700
Nice example, for me this is the first time I see a sumner line (never studied it).
I looks pretty simple, No plottingsheet needed. I begin to understand why Frank
promotes this method.
With using the hav table I had one doubt, the hav value is connected on two angles
For instance hv 0.1521 has 14°10' and 345°50', but if I remember correct t is
always < 90° so I have tot use the smallest angle?
I have to make markings in the table, to be sure I take the correct minutes column.
Top degrees with left minutes column, and bottem degrees with right minutes column.
greetings from Holland
HermanD 52°N 04°W