Re: Why is it called "up"?

[Roderick Smith <rodsmith@werple.net.au>]

There are three points hanging over in this lengthy thread.

Somebody asked about the silly numbers attached to the basic double
alpabetic notation (origin, destination).  The opening one is a code for
day of departure, using Portuguese & Brazilian numbering (1 = Sunday), and
not that used by every other railway system and all airlines.
The trailing one is to distinguish different trains with the same origin
and destination departing on the same day.

Are all Sydney monorail trains up; or are all down?

Somebody has pointed out that there are some anomolies in the USA use of
eastbound/westbound & northbound/southbound.  The definition was important
in traditional USA train-order working because one direction had rights
over the other.

I haven't checked, but perhaps all airlines use odd and even from a basic
USA system.
I remember that JAL772 is a northbound flight (ie returning to the centre
of operation).

--
Regards
Roderick B Smith
Rail News Victoria Editor