Russian METAR cloud heights
Are cloud heights on Russian METARs in feet or metres?
For instance: UOOO 201800Z 20006MPS 2500 DRSN HZ SCT029 M27/M30 Q1005 R19/39//35 NOSIG RMK QFE737/0983 Is that scattered at 2900 ft or something else? Thanks! |
Originally Posted by delarue
(Post 10451978)
Are cloud heights on Russian METARs in feet or metres?
For instance: UOOO 201800Z 20006MPS 2500 DRSN HZ SCT029 M27/M30 Q1005 R19/39//35 NOSIG RMK QFE737/0983 Is that scattered at 2900 ft or something else? Thanks! However, the ATIS normally quote the height in metres. |
Well that's not confusing at all...:ugh:
|
China has cloud base in metres on the ATIS as well. |
What is more confusing is the meters per second for wind...
|
not to mention QFE!
|
Double the metres per second and you get knots, simple.
|
Originally Posted by krismiler
(Post 10452369)
Double the metres per second and you get knots, simple.
|
Originally Posted by krismiler
(Post 10452369)
Double the metres per second and you get knots, simple.
|
Some military ATS in Europe also give wind in meters per second.
|
Originally Posted by a334
(Post 10452601)
Sure, but I still don't see the point of metres per second to begin with
|
Originally Posted by Banana Joe
(Post 10452618)
Some military ATS in Europe also give wind in meters per second.
|
Originally Posted by FZRA
(Post 10451999)
It's ICAO standard i.e. 2,900 feet.
However, the ATIS normally quote the height in metres. |
|
The metric system is much simpler and less likely to lead to confusion, we would be better off adopting it in its entirety than continuing with the present mishmash. A Russian pilot orders his fuel in kilograms, the tank quantities are given in kgs, he uses kgs on the load sheet and engine fuel flow indicates kg/hr. SIMPLE A western pilot could easily, depending on the type of aircraft and country he was in, order his fuel in litres, have tanks in USgal, use kgs on the loadsheet and have fuel flow indicated in pounds per hour. GLIMI GLIDER |
Originally Posted by krismiler
(Post 10452842)
The metric system is much simpler and less likely to lead to confusion, we would be better off adopting it in its entirety than continuing with the present mishmash. A Russian pilot orders his fuel in kilograms, the tank quantities are given in kgs, he uses kgs on the load sheet and engine fuel flow indicates kg/hr. SIMPLE A western pilot could easily, depending on the type of aircraft and country he was in, order his fuel in litres, have tanks in USgal, use kgs on the loadsheet and have fuel flow indicated in pounds per hour. GLIMI GLIDER In a fourth form physics class, the master got us to work out the energy used to push a certain weight up a slope of a certain incline. It took 30 minutes out of a forty-minute period in the avoirdupois system. Then he said "Now do it in metric". "Oh sir!" we all said as one, looking at the minute hand with 9 minutes left. We did it easily. Q.E.D |
I'm from Canada too but born in Europe, so I've been mixed between metric and imperial. I'm used to both at this point, but the russian meters per second still makes no sense to me, considering that the entire world uses knots for wind and distance, which is neither metric nor imperial anyways... I see no reason for the meters per second, km/h would make way more sense if you want to use metric units, but that's just my 2 cents
|
Anytime someone prefers the imperial system I ask them to convert pounds per cubic yard to ounces per cubic inch.
"but feet/hands/stone/yard/fahrenheit/pound/inch/rod/furlong/league/chain/link/perch/pint/quart/gallon is better" is based on familiarity, not superiority. That said, wind in m/s makes no sense if the aircraft speed is in km/hr. |
but the russian meters per second still makes no sense to me AWOS systems at airports typically feed the local weather models in that standard. Output for the airport is converted to the local standard, and runway specific. METAR, TAF, winds aloft, surface analysis charts, etc use true north as the reference. ATIS/AWOS/ASOS broadcasts, or any information a controller gives you over the radio, is magnetic. |
Originally Posted by hans brinker
(Post 10452875)
Anytime someone prefers the imperial system I ask them to convert pounds per cubic yard to ounces per cubic inch.
"but feet/hands/stone/yard/fahrenheit/pound/inch/rod/furlong/league/chain/link/perch/pint/quart/gallon is better" is based on familiarity, not superiority. That said, wind in m/s makes no sense if the aircraft speed is in km/hr. I suppose the wind aspect is a little strange because as I have said, knots is neither imperial nor metric, so in that regard it should be knots worldwide no matter what, but I suppose since meters per second is the easiest in terms of conversion to knots, you could argue for it |
Is metres per second or km/hr used for en route winds ? Surely km/hr would make more sense with distances and airspeed given in kilometres, in which case METAR wind could use km/hr as well. IIRC vertical speed is given in metres per second on the VSI in Russian aircraft instead of feet per minute which may have something to do with the METAR format being the same. |
It seems to me that all those who claim to ‘use the metric system’ don’t. If they did airspeed would be in m/s, fuel flow in kg/s, altitude in m etc. At least pressure is now in hectopascals (in the UK at least) so we are slowly getting there!
The messiest aircraft I’ve flown for units was a PA32 with fuel flow in US gal/hr. Fuel loaded in litres. W&B calculated in lbs. Lots of opportunities to get it wrong, |
In China, ATC use metric flight levels ie metres, but will instruct you to descend at 2000’ per minute. Japan gives QNH in inches, possibly because it’s more precise than mb. Then we have statute miles and nautical miles, imperial gallons and US gallons. |
Despite I very much prefer the metric system in everyday life and as much better than the imperial/nautical system it is in engineering, feet for altitude is easier to count: 1, 2, 3, 4, 5 thousand feet etc. vs. 300, 600, 900, 1200, 1500 ... metres. 100 metres vertical spacing would be too close, 500 metres would be a waste of space and still not be as easy to count as thousands of feet.
Wether it's knots or kilometres per hour doesn't make much difference, but they should use the same unit for airspeed and wind speed (and distance of course). Kilometres per hour for airspeed and metres per second for wind speed doesn't make much sense imho. Using the same unit not only helps with speed vs. distance calculations but also roughly comparing a crosswind relative to airspeed without having to think too much. |
For an untrained, earthbound person wind in m/s is very easy to understand.
|
For an untrained, earthbound person wind in m/s is very easy to understand. |
As an ex met-man familiar with the mix [and a survivor of the deg F/deg C change] I regret to say that anything other than a total change to metric is ultimately to fart against thunder.
One is, however, stuck with awkward 360 degrees, 60 minutes, 24 hours. 7 day weeks and 12 month years. These, I suspect, are beyond redemption. |
You forgot years being AD/BC based on the birth of Christ which is often referred to as common era while some countries use the Islamic Hijri calendar. |
Having flown the Russian types around the world for many years I never had a issue with units conversion and qnh/qfe utilization in spite of equipment and rule difference. As my colleagues as well
|
Originally Posted by langleybaston
(Post 10453508)
As an ex met-man familiar with the mix [and a survivor of the deg F/deg C change] I regret to say that anything other than a total change to metric is ultimately to fart against thunder.
One is, however, stuck with awkward 360 degrees, 60 minutes, 24 hours. 7 day weeks and 12 month years. These, I suspect, are beyond redemption. |
In this case it is 2900'
but if you have RMK QBB110 it means cloud base is 110 meters |
I never had a issue with units conversion and qnh/qfe utilization in spite of equipment and rule difference. |
I agree, it's inconveniently but possible :)
|
All times are GMT. The time now is 22:06. |
Copyright © 2024 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.