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protect essential
13th Mar 2011, 05:32
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, 09:11
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, 09:58
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, 11:26
Pong Mahjong!

zonnair
15th Mar 2011, 07:49
and U = for tendency to increase :ok:

ron83
15th Mar 2011, 17:48
D= Downward tendency
U= Upward tendency
N= Neutral tendency