OK So.. This is how I understand it so far.
1- RVR minimum for Choppers is 1200
2- RVR A station is the only one that applies. (We can ignore RVR B reports)
3- RVR reports take precedence over Runway VIS or Ground VIS
4- Runway Vis takes Precedence over Ground VIS
5- RVR reports are the only VIS report that can impose a BAN on a Helicopter. (eg: If there are no RVR reporting stations available, we can attempt an approach regardless of visibility)
6- If RVR A is unserviceable and RVR B indicated less than 1200 you're still good to go.
7- RVR is below 1200 with localized phenomenon you're good to go
8- And finally RVR can fluctuate below and above 1200 and you're good to go
That in mind I was doing great answering sample exam questions till I fell across this one.
"You have an RVR A of 800 with Visibility of 1/4 mile. Can you attempt an approach?"
In my mind the answer would be NO but for some reason the answer is:
"Yes, the visibility permits you to conduct an approach regardless of the RVR value."
I thought it was solid in my head till this point. Now I feel as though it's all falling apart.
CARs specifically states that RVR takes precedence over reported ground vis. However the answer to this question implies that as long as either the RVR OR the VIS is greater than 1200 or 1/4 mile respectively.. you're ok to go. Seems contradictory to me.
Can anyone shed some light on this and perhaps help me maintain my sanity?
I would be extremely grateful.
