Dear Frank et al,
An intriguing side issue to your puzzle is that
it relates to the discussion about the Hawkeshead
dial and the notion of a Plane's Longitude and,
implicitly, the notion of a Plane's Latitude.
Once you have taken on board these notions, the
simplest way of expressing the
Greetings, fellow dialists,
So many clever solutions! I am no mathematician but I suppose I am in
duty bound to add my two pennyworth to the sunset problem. If 90 deg is
added to the angle Pole-Paris-London (obtainable from given) then this
angle is the internal angle of Pole-Paris-Sun. The
Hello Franks and all,
I assume we are to neglect altitude differences and use the fictional
spherical earth model, but just what do we mean by 'the same time'? I
would assume that when two or more persons look at their watches,
corrected for standard zone time, that they read the same
Hello Edley and listeners everywhere,
Edley, I don't quite know how to answer you. I explained in an earlier
message that this was a real question set for airline pilots but it was
fifty eight years ago and the exact wording unfortunately eludes me. Did
they have nanoseconds then? And what
