RVR

[riqsid]

Hi all

I just have a small confusion here. I always thought that RVR values are given in metres but i actually went through one of the jeppesen airport charts, which gave figures in feet, ??? And also for example if RVR 6 or 1 is given does this mean 600 metres or 1 km vis or is it 600 metres or 1 sm ?

Someone to help me out plss

[welliewanger]

I'm not the oracle and am open to being proved wrong:

Whenever I've flown in the states, RVR has been in statute miles (or feet). Everywhere else (Europe, Asia, Australia, Eastern bloc at least) it's in meters.

[HEATHROW DIRECTOR]

<<And also for example if RVR 6 or 1 is given does this mean 600 metres or 1 km>>

I have never heard of RVR, or any visibility, being passed in that manner. The values should be passed in full, whichever type of measurement is employed. E.g "RVR 100 metres", "Visibility 900 yards", etc.

[Escape Path]

@Heathrow Director:

This what my mate here is on about. Have a look

http://img217.imageshack.us/img217/1493/jfkb.jpg

The minimums read "RVR 18 or 1/2". 1800ft is some 550 metres and half a statute mile is 800 metres, which sort of agrees with our charts with vis in metres

[MarkerInbound]

In the Introduction section there is a page for USA Format and one for Worldwide Charts. My bookshelf copy is 10 years old but they are page 126 and 127. The US info is given in "hundreds of feet", the Worldwide "values are shown in measuring units as reported by the governing agency."

[riqsid]

Alrite so it differs depending on the controlling agency, Thanks escape path for the clear cut example. A big thankyou to you all