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> Seriously, can we confine this to UTC, GMT, and Daylight Savings Time as
> they vary for US time zones that observe DST?

Jared

Being strictly serious, the southwestern shore of Lake Michigan, which is
mostly Indiana, is populated by major steel works and oil refineries.  In
this area the Illinois, Indiana, and Michigan offshore boundaries meet.
There is considerable commercial traffic in this region, and I have
infrequently witnessed commercial traffic anchored off awaiting their turn
to load/unload. It is quite possible for a ship to have been in two or three
state's waters in an hour.  Imagine the thrill if each had a different time
zones and practices regarding daylight savings time.

West Wing, as well as others have had fun at Indiana's expense because of
differing time zones, but there are pragmatic interstate commerce reasons
for this apparent schizophrenia.

Perhaps not of interest to the Naval Observatory, but for practical
navigation in this area, "mathematically" significant IMHO.

Bill

   

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