Re: Fracturing the Pacific

Date:         27 Aug 97 03:57:54 
From:         gfoley@freenet.columbus.oh.us (Gerard Foley)
Organization: The Greater Columbus FreeNet
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M Carling (m@bang.org) wrote:
>JFK-SIN (like JFK-BKK) has a great circle route going round the other way,
>north of Scandanavia and Siberia. However, the route would probably be flown
>eastbound in each direction to take advantage of prevailing winds. To be
>ETOPS legal would require large deviations from the great circle routes,
>which might be advantageous if flown eastbound in both directions. Please
>note that this paragraph is highly speculative.

    Lest anyone forget, there is only one plane passing through the
center of the earth and two non-antipodal points on the surface.  This
defines two great circle paths between the points, a short path and
a long path.  For instance, if both points are in the northern hemisphere
the short path is nearer the north pole than it is to the south pole.
The long path is the other one, going nearer the south pole.

    If the short great circle path goes eastward from A to B, the shortest
eastward path from B to A will be the long one.

    I knew you knew that!  (:-))

Gerry K8EF

--
Gerry