Narrative:

Shortly after leveloff; the captain was looking through the flight paperwork and noticed a NOTAM for our destination alternate we had overlooked that said 'ad clsd.' looking through the onboard pubs; we were unable to find a translation of that abbreviation; so he initiated a phone patch with dispatch. It was determined that we had suspected was true; the aerodrome was closed. We were given amendments to the release with a new alternate and fuel numbers. The flight continued to destination without incident. Contributing factors to our having missed this NOTAM were: preflight having to make several calls to dispatch; to correct mistakes and omissions on the flight plans and paperwork. We were given 3 different flight plans that include one to fuel stop in ZZZ -- all of which had problems or mistakes. So the cockpit workload prior to departure was very high. Also; ATC continuing to use antiquated abbreviations designed for use with teletype machines; makes an important NOTAM like this very easy to overlook.

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Original NASA ASRS Text

Title: A FLIGHT CREW NOTICED ENROUTE TO DESTINATION THAT THEY HAD OVERLOOKED A NOTAM THAT ADVISED ONE OF THEIR ALTERNATES WAS CLOSED. THE CREW CITED ANTIQUATED NOTAM ABBREVIATIONS AS CONTRIBUTING TO THE PROBLEM.

Narrative: SHORTLY AFTER LEVELOFF; THE CAPT WAS LOOKING THROUGH THE FLT PAPERWORK AND NOTICED A NOTAM FOR OUR DEST ALTERNATE WE HAD OVERLOOKED THAT SAID 'AD CLSD.' LOOKING THROUGH THE ONBOARD PUBS; WE WERE UNABLE TO FIND A TRANSLATION OF THAT ABBREVIATION; SO HE INITIATED A PHONE PATCH WITH DISPATCH. IT WAS DETERMINED THAT WE HAD SUSPECTED WAS TRUE; THE AERODROME WAS CLOSED. WE WERE GIVEN AMENDMENTS TO THE RELEASE WITH A NEW ALTERNATE AND FUEL NUMBERS. THE FLT CONTINUED TO DEST WITHOUT INCIDENT. CONTRIBUTING FACTORS TO OUR HAVING MISSED THIS NOTAM WERE: PREFLT HAVING TO MAKE SEVERAL CALLS TO DISPATCH; TO CORRECT MISTAKES AND OMISSIONS ON THE FLT PLANS AND PAPERWORK. WE WERE GIVEN 3 DIFFERENT FLT PLANS THAT INCLUDE ONE TO FUEL STOP IN ZZZ -- ALL OF WHICH HAD PROBS OR MISTAKES. SO THE COCKPIT WORKLOAD PRIOR TO DEP WAS VERY HIGH. ALSO; ATC CONTINUING TO USE ANTIQUATED ABBREVIATIONS DESIGNED FOR USE WITH TELETYPE MACHINES; MAKES AN IMPORTANT NOTAM LIKE THIS VERY EASY TO OVERLOOK.

Data retrieved from NASA's ASRS site as of May 2009 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.