Cfalk From , joined Dec 1969, posts, RR:
Reply 2, posted (11 years 5 months 2 weeks 5 days 4 hours ago) and read 2460 times:
Scientists decided that the metric system IS THE system, so we should use it always.
Huh? Which scientists? Metric may be easier to understand to the layman, but Imperial measures are just as valid scientifically as any other.
As L-188 said, tradition is a large part of it. Imperial measures have been around a whole lot longer than Metric. Also, it is largely the Americans and the British that developed wide-scale international air travel, so they were the first to make the rules.
Some Americans here might remember that there was a big, expensive effort in the 70's and 80's to switch the U.S. to the Metric system, but people were not convinced, and the effort died out.
Woodreau From United States of America, joined Sep 2001, 1065 posts, RR: 6
Reply 4, posted (11 years 5 months 2 weeks 5 days 4 hours ago) and read 2427 times:
Well actually ICAO is the organization which publishes an international recommended standard units of measure for aviation. But each country's aviation authority specifies what units will be used in that particular country.
The different units of measure between each country can be found in each country's AIP.
Bonus animus sit, ab experientia. Quod salvatum fuerit de malis usu venit judicium.
Sccutler From United States of America, joined Jan 2000, 5648 posts, RR: 28
Reply 6, posted (11 years 5 months 2 weeks 4 days 20 hours ago) and read 2397 times:
Actually, the knot (nautical mile) has independent significance, and is not random.
Nautical miles measure distance. 1 nautical mile is the angular distance of 1 minute of arc on the earth's surface. As these differ slightly (6108' at pole c.f. 6046' at equator) 6080 was adopted (this being it's approximate value in the English Channel). The International nautical mile is 1852 metres, so is very slightly different from the UK nautical mile.
1 UK nautical mile = 1.00064 international nautical miles
You should expect to continue to use knots for a good long time.
As for other measures, I wish the metric conversion had happened in the early 70's, as we were taught and expected it would when I was in elementary school in teh 60s.
...three miles from BRONS, clear for the ILS one five approach...
GDB From United Kingdom, joined May 2001, 13297 posts, RR: 77
Reply 11, posted (11 years 5 months 2 weeks 1 day 21 hours ago) and read 2308 times:
Bet NASA wished they'd standardized on either system after that Mars probe in 1999 was lost.
The world IS going metric, slowly.
I was only taught metric at school in the 70's.
As a young child I can remember old age pensioners ('seniors' in the US) moaning about the UK switch to a decimal money system, which happened in 1971.
"I can't understand it" was the mantra. Yeah right, sharp enough with figures when your playing bingo aren't you?
Amazingly, you get a few no-life types in the UK still refusing to use metric, I mean we've only been trying to convert to it since the early 19th century after all!
And what about all us who've been educated in metric, which must have been going on for 30+ years now.
Teva From France, joined Jan 2001, 1876 posts, RR: 15
Reply 12, posted (11 years 5 months 2 weeks 1 day 20 hours ago) and read 2303 times:
To keep it simple....
Quantities of hazardous material on board a flt must be in Kilos, as per IATA and ICAO regulations.
That means that in the US, aviation professionals have to play with the 2 systems.
In Europe, it is the same. On weight and balance, weights will be in kilos. But ATC will talk in feet...
L-188, I am sorry, but the metric system is not the creation of the devil. It has been given to the world by the French revolution... Or maybe Frenchies are evil.... Vade retro satanas...
Ecoute les orgues, Elles jouent pour toi...C'est le requiem pour un con
MD-90 From United States of America, joined Jan 2000, 8508 posts, RR: 12
Reply 14, posted (11 years 5 months 2 weeks 1 day 16 hours ago) and read 2286 times:
Don't forget that the majority of the world's aircraft come from the United States. It ain't just Boeing, Lockheed, and McDonnell Douglas, it's also Cessna, Piper, Beech, Lancair, Cirrus, Van's, Rutan, etc.
The only other really historically big producer of aircraft was the USSR, which is now dissolved. And of course there's today's Airbus, but what about the little (numerous) planes? Aside from micolights, there aren't that many Socatas, Grobs, Zlins, etc out there.