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HeliTorque :: View topic - Q6 : Visibility in Plain English METARs
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HeliTorque Forum Index » Ground School

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Q6 : Visibility in Plain English METARs
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WhirlyGirl
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PostPosted: Wed Nov 09, 2005 6:54 pm    Post subject: Q6 : Visibility in Plain English METARs Reply with quote

Sorry folks, been out of the loop for a few days suffering full time ground school in preparation for next week. Yikes!

Here's one I am struggling to find any information to back up - perhaps a weather expert can help!


How is the visibility in an aviation routine weather report (METAR) expressed in plain language?

a. In feet and nautical miles
b. In nautical miles only
c. Up to 5000m in metres, above in kilometres
d. Up to 1500m in metres, above in kilometres
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James T Lowe
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PostPosted: Wed Nov 09, 2005 10:09 pm    Post subject: Reply with quote

C or D.

I think D.
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helicopter-redeye
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PostPosted: Wed Nov 09, 2005 10:30 pm    Post subject: Reply with quote

C

"Visiability 4000m"; "visiability 8km"; etc
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PostPosted: Thu Nov 10, 2005 8:39 am    Post subject: Reply with quote

I was confused because I saw 4.5km on a metar. Originally I thought C too, but after some searching it made me doubt it. On the stanard metars you even get 8000, 6000, 9999 etc, but in the plain language METARs it seems to be different.

So I still dont know! Very Happy

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WhirlyGirl Cool
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PostPosted: Thu Nov 10, 2005 8:42 am    Post subject: Reply with quote

I just looked up a site which delivers the METARs in plain language:

http://www.thehangar.co.uk/metars/index.php

Unfortunately most of them seem to be 10k or more, but if you select Teeside (if the wx is still the same by the time you look!) it says 4km visibility.

I have yet to find one with worse vis.

Hmmm Confused

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PostPosted: Thu Nov 10, 2005 9:31 am    Post subject: Reply with quote

Q asks about METAR decode 'in plain language' (ie decode into English)

a. In feet and nautical miles

Vis is expressed in M and KM so delete

b. In nautical miles only

Vis is expressed in M and KM so delete

c. Up to 5000m in metres, above in kilometres

Last answer standing (I remember this M/KM division from the phase I course some time ago, and Roger was the worlds leading Met lecturer..)

d. Up to 1500m in metres, above in kilometres

If min vis is < 1500m and vis in another sector > 5000m, the value and direction of the max vis is also given (1300SE 7000N)


JAR questions don't have to be logical (or in some cases even right ...)
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PostPosted: Thu Nov 10, 2005 6:17 pm    Post subject: Reply with quote

So the answer's C? Ok, I'll remember that. At least by talking about these dodgy questions it makes you remember them!! Very Happy

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