Originally Posted by Calpilot
There are no airports in the US that allow for a take-off less than 600 RVR but we need to be authorized to 500 RVR to be able to to go down to 150 meters. RVR values this low only measure in even numbers such as 400, 600, 800, etc. therefore you will never see 500 RVR except in training or checkrides.
According to the -9 for Memphis, runways 18R, 18C, 18L, 36R, 36C, and 36L have T/O mins of 5/5/5. I just saw this the other day and thought it was interesting.