Originally Posted by
Texandrvr
In fact, with an 1800 RVR you won't even have the threshold in sight at DH on a CAT I.
At DA (DH is CAT 2) on a CAT 1 1800rvr approach you wouldnt be looking for the threshhold... Normally on a 1800rvr CAT 1 approach you would be looking for the approach light system, once in sight you are allowed 100 ft above TDZE... That should get you the "runway environment". If the approach doesnt end up like that, the rvr isnt 1800.