= Сообщение: 12221 из 12492 ===================================== ENET.SYSOP = От : Vincent Coen 2:250/1 24 May 23 17:40:37 Кому : Michiel van der Vlist 24 May 23 17:40:37 Тема : Metric vs archaic (was: A computer I can recommend) FGHI : area://ENET.SYSOP?msgid=2:250/1@fidonet+646e4174 На : area://ENET.SYSOP?msgid=2:280/5555+646e02ff = Кодировка сообщения определена как: UTF-8 ================================== Ответ: area://ENET.SYSOP?msgid=2:280/5555+647351f9 ============================================================================== Hello Michiel!
Wednesday May 24 2023 14:28, you wrote to me:
> Hello Vincent,
> On Tuesday May 23 2023 21:00, you wrote to me:
VC>>>> In the UK thanks to the EU we had to switch to metric in al VC>>>> most all things but luckily for distances still in miles both VC>>>> statue and nautical.
>>> Why "luckily" still miles (in two flavours) for distances?
VC>> Normal distances as statute - i.e., 5280 against nautical / VC>> marine 6076. Above Statute mile is not for Scotland which is VC>> around 600 feet longer or was. Saying that, I think they use the VC>> UK standard but I would not bet the farm on it :)
> Nautical miles, Statute miles, Scottish miles. What a mess... Why not > use kilometers like (most of) the rest of the world?
> I do not know the original definition of the Statute mile, but the > nautical mile is one arc minute on the equator. It was Napoleon that > defined the km as 1/40000 part of the equator. Or 1/100 of a Grad. A > Grad is 1/100 of a straight angle. The kilogram and the kilometre are > in wide spread use. But the Grad on which they are ultimately based > did not make it into common use. That was a bridge too far for > Napoleon.
> Metric time was two bridges too far. 10^5 "seconds" in a day. 10 > "Hour" in a day. 100 "Mimutes" in an "Hour". 100 "Seconds" in a > "Minute". That "Second" would be about 0.86 second. Two, or maybe > three bridges too far. No metric clock..
One nautical mile is based on 1 minute of latitude hence use for ships and aircraft.
Statute mile of 5,280 feet goes back considerable before that of the kiloometer as that is somewhat young.
The mile originates from a Roman mille passus or thousand paces, which measured 5,000 Roman feet. A Roman pace equals 5 Roman feet measured from the point at which the heel of one foot was raised to the point at which it was set down again after an intervening step by the other foot. So over 1800 years before hand.
Like I said, goes back a lot further !
The French just like reinventing stuff if they did not think of it. i.e., GMT (Greenwich Mean Time) is the mean solar time at the Royal Observatory in Greenwich, London, counted from midnight. I will let you look that up as to why !
They created UTC, same thing but they define it differently I think.
Too many years ago when I had to study this stuff.
Vincent
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