Narrative:

On takeoff roll with another on final, tower appeared to advise that the RVR was 1400 ft, but this was not clear. Due to the situation the takeoff roll was continued. Supplemental information from acn 316777: departing aus this morning our special ATIS right before takeoff was reporting ceiling 200 ft visibility 1.5 mi fog. When we arrived at runway 31L for departure tower informed us to hold short, arriving traffic. Then she cleared us into position and shortly after that she cleared us for takeoff. As we completed our checks, we were on our takeoff roll, the air traffic controller stated VFR either 1400 ft or 2400 ft, there was some discrepancy between myself and my copilot as to which. By this time we were well into our takeoff, and I felt rather than abort takeoff at this point with an aircraft behind us landing, and visibility being limited and a short runway, that it was safer to continue the takeoff and discuss the discrepancy later. Takeoff was uneventful. Recommendations are that crews be given adequate time to review and understand visibility changes prior to being in takeoff roll and having to make decisions at that time.

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Original NASA ASRS Text

Title: TKOF WITH WX BELOW MINIMUMS.

Narrative: ON TKOF ROLL WITH ANOTHER ON FINAL, TWR APPEARED TO ADVISE THAT THE RVR WAS 1400 FT, BUT THIS WAS NOT CLR. DUE TO THE SIT THE TKOF ROLL WAS CONTINUED. SUPPLEMENTAL INFO FROM ACN 316777: DEPARTING AUS THIS MORNING OUR SPECIAL ATIS RIGHT BEFORE TKOF WAS RPTING CEILING 200 FT VISIBILITY 1.5 MI FOG. WHEN WE ARRIVED AT RWY 31L FOR DEP TWR INFORMED US TO HOLD SHORT, ARRIVING TFC. THEN SHE CLRED US INTO POS AND SHORTLY AFTER THAT SHE CLRED US FOR TKOF. AS WE COMPLETED OUR CHKS, WE WERE ON OUR TKOF ROLL, THE AIR TFC CTLR STATED VFR EITHER 1400 FT OR 2400 FT, THERE WAS SOME DISCREPANCY BTWN MYSELF AND MY COPLT AS TO WHICH. BY THIS TIME WE WERE WELL INTO OUR TKOF, AND I FELT RATHER THAN ABORT TKOF AT THIS POINT WITH AN ACFT BEHIND US LNDG, AND VISIBILITY BEING LIMITED AND A SHORT RWY, THAT IT WAS SAFER TO CONTINUE THE TKOF AND DISCUSS THE DISCREPANCY LATER. TKOF WAS UNEVENTFUL. RECOMMENDATIONS ARE THAT CREWS BE GIVEN ADEQUATE TIME TO REVIEW AND UNDERSTAND VISIBILITY CHANGES PRIOR TO BEING IN TKOF ROLL AND HAVING TO MAKE DECISIONS AT THAT TIME.

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.