Narrative:

Airport WX 200' overcast, 1/4 F, RVR 1200' V 1600'. Taxiing out for departure, we discussed the operations specifications for lower than standard takeoff minimums. We are a part 121 carrier flying 2 engine turbo propellers. In reading between 1600' RVR and 1200' RVR requirements, we were confused about the items required being 'and,' 'or.' we understood that for 1200' RVR it was 2 operational transiometers or runway centerline lights, when in fact both area required. We departed RVR 1400' west/O centerline lighting. I believe the new operations specifications are too confusing to be readily read in the cockpit when required. Also, they are too lengthy and complex to be memorized. The operations specifications should be written in an easy to understood, abbreviated format.

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Original NASA ASRS Text

Title: ACR MDT MADE A TKOF IN WX REPORTED BELOW ARPT MINIMUMS FOR TKOF. PIC CLAIMS OPERATIONAL SPECIFICATIONS CONFUSING.

Narrative: ARPT WX 200' OVCST, 1/4 F, RVR 1200' V 1600'. TAXIING OUT FOR DEP, WE DISCUSSED THE OPS SPECS FOR LOWER THAN STANDARD TKOF MINIMUMS. WE ARE A PART 121 CARRIER FLYING 2 ENG TURBO PROPS. IN READING BTWN 1600' RVR AND 1200' RVR REQUIREMENTS, WE WERE CONFUSED ABOUT THE ITEMS REQUIRED BEING 'AND,' 'OR.' WE UNDERSTOOD THAT FOR 1200' RVR IT WAS 2 OPERATIONAL TRANSIOMETERS OR RWY CENTERLINE LIGHTS, WHEN IN FACT BOTH AREA REQUIRED. WE DEPARTED RVR 1400' W/O CENTERLINE LIGHTING. I BELIEVE THE NEW OPS SPECS ARE TOO CONFUSING TO BE READILY READ IN THE COCKPIT WHEN REQUIRED. ALSO, THEY ARE TOO LENGTHY AND COMPLEX TO BE MEMORIZED. THE OPS SPECS SHOULD BE WRITTEN IN AN EASY TO UNDERSTOOD, ABBREVIATED FORMAT.

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.