It's not impossible to fly right at the legal minimum flight visibility
General Part 91 pilots can start the approach with RVR zero if they want, and flight visibility
is the final arbiter on whether you can continue from DA to the pavement, no matter what the official RVR reading is.
For one, ground and flight visibility
is compromised by being hemmed in by two wings and having the forward view blocked during taxi.
He added the decision to cancel flights was due to the ash affecting flight visibility
and also the workings of plane engines.
It's a better plan to know the rules and do your best to fly within them--even if someday you're arguing, "The flight visibility
honestly looked like half a mile .
But it's sometimes difficult to determine ceiling height or expected flight visibility
from the ground, and it's a lot smarter to already have the clearance you need before taking off from non-towered airports.
Expect the required flight visibility
, cloud and terrain/ obstruction clearance all the way to the airport
In my study of accidents, I've learned that ground visibility is not the same as flight visibility
local showed a 900-foot overcast with 10 miles visibility, plus a 2-degree temperature-dewpoint spread (13/11) that could have made flight visibility
When pilots think of reduced flight visibility
, we often think of IFR, or at least marginal VFR.
It states that the "RVR to Visibility Conversion" table may be used for converting RVR to flight visibility
If it's not, we still can shoot the approach and land there but we'll need to increase the procedure's specified minimum flight visibility