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protect essential

13th Mar 2011 04:32

Atis RVR abbreviation?

Recently saw this abbreviation on Atis: 650D and 700N. What does the "D" and "N" mean?? BTW, this was in China

Thanks.

Mohit_C

13th Mar 2011 08:11

I understand it as RVR of 650 metres with a tendency to decrease(D) and RVR of 700 metres with a tendency to not change/stay constant (N).

Green Guard

13th Mar 2011 08:58

that was in China ?

I would believe, if it came like :

六百五十減少，七百沒有變化

BOAC	13th Mar 2011 10:26

Pong Mahjong!

zonnair

15th Mar 2011 06:49

and U = for tendency to increase :ok:

ron83

15th Mar 2011 16:48

D= Downward tendency
U= Upward tendency
N= Neutral tendency

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