Narrative:

Runway 36 dca, WX was reported as visibility more than 30 mi. RVR was reported as 2400'. We elected to set up for a standard ILS for runway 36. Just before the marker, tower reported an RVR of 1400'. We elected to change to the ILS 36 CAT ii approach. Unfortunately, we overlooked the fact that this is not a standard CAT ii approach with RVR 1200' RVR instead listed as 1600'. We shot the approach, landed and parked. At the gate we realized our mistake. Contributing factors: we could see the entire runway from the time we turned a right base and through the approach landing and rollout there was a pocket of fog about 3000' down from the threshold, but this still didn't hinder us from keeping centerline in sight. WX seemed to be even above VFR minimums. Recommendations: when RVR restrictions are above standard, maybe they should be highlighted or enlarged to draw attention to it.

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Original NASA ASRS Text

Title: FLT CREW OF LGT MADE APCH AND LANDED DCA WITH RVR 1400'. 1600' REQUIRED FOR ILS CAT II APCH AND LNDG.

Narrative: RWY 36 DCA, WX WAS RPTED AS VISIBILITY MORE THAN 30 MI. RVR WAS RPTED AS 2400'. WE ELECTED TO SET UP FOR A STANDARD ILS FOR RWY 36. JUST BEFORE THE MARKER, TWR RPTED AN RVR OF 1400'. WE ELECTED TO CHANGE TO THE ILS 36 CAT II APCH. UNFORTUNATELY, WE OVERLOOKED THE FACT THAT THIS IS NOT A STANDARD CAT II APCH WITH RVR 1200' RVR INSTEAD LISTED AS 1600'. WE SHOT THE APCH, LANDED AND PARKED. AT THE GATE WE REALIZED OUR MISTAKE. CONTRIBUTING FACTORS: WE COULD SEE THE ENTIRE RWY FROM THE TIME WE TURNED A RIGHT BASE AND THROUGH THE APCH LNDG AND ROLLOUT THERE WAS A POCKET OF FOG ABOUT 3000' DOWN FROM THE THRESHOLD, BUT THIS STILL DIDN'T HINDER US FROM KEEPING CENTERLINE IN SIGHT. WX SEEMED TO BE EVEN ABOVE VFR MINIMUMS. RECOMMENDATIONS: WHEN RVR RESTRICTIONS ARE ABOVE STANDARD, MAYBE THEY SHOULD BE HIGHLIGHTED OR ENLARGED TO DRAW ATTN TO IT.

Data retrieved from NASA's ASRS site as of July 2007 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.