Next message: tony: "Use of a sextant contravenes H&S legislation!"
As for evidence that people were still doing time sights and Noon Sun, I
just wanted to remind everyone that people on this list did just that some
decades ago. Here's a post from Henry Halboth detailing the procedure for
combining the morning time sight with the noon latitude:
_http://www.irbs.com/lists/navigation/0506/0202.html_
(http://www.irbs.com/lists/navigation/0506/0202.html)
Of course (!), there is an equivalent procedure with two Sumner lines. The
point is simply that celestial lines of position did not become the universal
procedure until almost a hundred years after Sumner's booklet was published.
-FER
42.0N 87.7W, or 41.4N 72.1W.
www.HistoricalAtlas.com/lunars
