SuseJ772
Topic Author
Posts: 703
Joined: Wed Aug 10, 2005 11:13 am

### FL 354?

I was looking at the top photos of this past day and I noticed in the photo below this Air China flight was cruising at 354. Of course, I thought it was just climbing to its flight level (maybe 360), but as I looked closer I noticed that AP was set at 35400 and the "rate of climb meter" (what the heck is that called again) was at 0 ft/min. So here's my question, how common is a Flight Level of XX400? I thought they were always XX000 or if VFR it was XX500? Am I wrong or is this an anomaly.

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MDorBust
Posts: 4914
Joined: Fri Sep 30, 2005 10:10 pm

### RE: FL 354?

 Quoting SuseJ772 (Thread starter):(what the heck is that called again)

Variometer
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ACDC8
Posts: 7350
Joined: Thu Mar 10, 2005 6:56 pm

### RE: FL 354?

Could be that the aircraft is flying over Russia. They use the metric system for altitude so if ATC were to give an altitude clearance of 10 800 meters, that would be about 35 400 feet.

[Edited 2007-03-22 04:28:12]

[Edited 2007-03-22 04:29:58]
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onetogo
Posts: 286
Joined: Thu Feb 02, 2006 1:40 pm

### RE: FL 354?

 Quoting MDorBust (Reply 1):Quoting SuseJ772 (Thread starter): (what the heck is that called again) Variometer

Ermm.. Vertical Speed Indicator.

LTU932
Posts: 13225
Joined: Fri Jan 06, 2006 12:34 am

### RE: FL 354?

 Quoting ACDC8 (Reply 2):Could be that the aircraft is flying over Russia.

Actually it's in flight in China, where the Metric system is used in aeronautics as well. It says so in the picture.

I've seen plenty of pictures where aircraft flew at FL354, so it seems that it's a very common flight level in Russia and China.
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ACDC8
Posts: 7350
Joined: Thu Mar 10, 2005 6:56 pm

### RE: FL 354?

 Quoting Onetogo (Reply 3):Quoting MDorBust (Reply 1): Quoting SuseJ772 (Thread starter): (what the heck is that called again) Variometer Ermm.. Vertical Speed Indicator.

One in the same, just a different name for it. Glider's and Concorde use(d) the term variometer IIRC.
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SFO777200LR
Posts: 90
Joined: Mon Mar 19, 2007 1:40 am

### RE: FL 354?

 Quoting ACDC8 (Reply 2):Could be that the aircraft is flying over Russia. They use the metric system for altitude so if ATC were to give an altitude clearance of 10 800 meters, that would be about 35 400 feet.

I don't think the a/c is over Russia because it is an Air China 757 (or does Air China fly 757s to a destination in Russia?).

At any rate, why would ATC clear them to 10,800 meters instead of 10,000 or 11,000 meters?

I looked at this picture and wondered the same thing.
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zeke
Posts: 10949
Joined: Thu Dec 14, 2006 1:42 pm

### RE: FL 354?

 Quoting SuseJ772 (Thread starter): Am I wrong or is this an anomaly.

In China, Mongolia and Russia (hence CIS states) use metric flight levels.

FL354 is FL10800 m in the metric terms, flying from Hong Kong to Europe we go over to metric levels before entering Chinese airspace, change of flight level going into Mongolia and stay metric until we hit Europe, no real issue with them, just a bit more to say on the radio, i.e. instead of saying "flight level three five four" we would have to say "flight level ten thousand eight hundred meters"

[Edited 2007-03-22 04:59:17]
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ACDC8
Posts: 7350
Joined: Thu Mar 10, 2005 6:56 pm

### RE: FL 354?

 Quoting Zeke (Reply 7):In China, Mongolia and Russia (hence CIS states) use metric flight levels.

Was going to ask if any other countries used the metric system as well.

Also, are some aircraft not equipped to switch the reading on the display between meters and feet?
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zeke
Posts: 10949
Joined: Thu Dec 14, 2006 1:42 pm

### RE: FL 354?

 Quoting SuseJ772 (Thread starter):"rate of climb meter" (what the heck is that called again)

on jets its an IVSI = Instantaneous Vertical Speed Indicator
Human rights lawyers are "ambulance chasers of the very worst kind.'" - Sky News

zeke
Posts: 10949
Joined: Thu Dec 14, 2006 1:42 pm

### RE: FL 354?

 Quoting ACDC8 (Reply 8): Was going to ask if any other countries used the metric system as well.

Yes China, Russia, Mongolia, Kazakhstan, Kyrgyzstan, Tajikistan, Turkmenistan, Uzekistan

 Quoting ACDC8 (Reply 8): Also, are some aircraft not equipped to switch the reading on the display between meters and feet?

Yes, and some aircraft are not set up in feet. Remember a few years back a Russian TU154 almost crashed with a 744 as the TU154 transponder encoder was in meters and the 744 in feet, instead of being 20,000 ft apart as the 744 TCAS thought, they were on the same flight level.

In the aircraft in the photo it is all in ft, on the Airbus we have a metric button that displays the metric and imperial altitude, and target altitudes on the PFD, the FCU is still in ft, much the same as the glare shield on the photo in the thread starter.
Human rights lawyers are "ambulance chasers of the very worst kind.'" - Sky News

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