Narrative:

We were cleared for the visual approach but advised that there appeared to be a fog bank between the FAF and the runway. We could clearly see the runway and approach lights but we didn't see the fog or clouds. We accepted the visual approach and joined final just outside the marker. As we joined final; the low cloud came into view. Previous arrival said that they passed beneath it. As we proceeded down final (about 1500 ft) I asked the captain if he wanted me to ask for the ILS or go around. He had me ask if we could be cleared for the ILS. I did; and we were cleared for the ILS at about 1000 ft AGL. Problem was that we had already entered an area of reduced visibility. We never lost visual contact with the runway; but from the tower's perspective it may have appeared that we were in a cloud. We were only in it for a few seconds.

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Original NASA ASRS Text

Title: A B757 flight crew flew into a fog bank during a visual approach.

Narrative: We were cleared for the visual approach but advised that there appeared to be a fog bank between the FAF and the runway. We could clearly see the runway and approach lights but we didn't see the fog or clouds. We accepted the visual approach and joined final just outside the marker. As we joined final; the low cloud came into view. Previous arrival said that they passed beneath it. As we proceeded down final (about 1500 FT) I asked the Captain if he wanted me to ask for the ILS or go around. He had me ask if we could be cleared for the ILS. I did; and we were cleared for the ILS at about 1000 FT AGL. Problem was that we had already entered an area of reduced visibility. We never lost visual contact with the runway; but from the tower's perspective it may have appeared that we were in a cloud. We were only in it for a few seconds.

Data retrieved from NASA's ASRS site as of April 2012 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.