B737-800 flight crew has a track heading deviations en route mia.

Attributes
ACN	710121
Time
Date	200609
Local Time Of Day	1801 To 2400
Place
Locale Reference	atc facility : zjx.artcc
State Reference	FL
Environment
Light	Daylight
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	B737-800
Operating Under FAR Part	Part 121
Navigation In Use	other
Flight Phase	cruise : level
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
ASRS Report	710121
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Events
Anomaly	non adherence : clearance other spatial deviation
Independent Detector	other controllera
Resolutory Action	controller : issued advisory controller : provided flight assist flight crew : returned to original clearance
Consequence	faa : reviewed incident with flight crew
Supplementary
Problem Areas	Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance

Narrative:

On traveling between diw and the point joray; ATC inquired where we were going and that he was not used to us being on that particular route. I looked at the FMC and we were proceeding direct joray. He then said we should proceed direct bgdog and then to joray. Nothing else was said after this. We were deviating for WX afterward; and then proceeded uneventfully to mia. We had been given directs prior to this and possibly we lost the AR22 portion of the flight plan. We also were preparing for the upcoming WX en route to mia and what our plan of attack would be in navigating through it. We were also reviewing updates to the mia ATIS when they would come out due to thunderstorm activity at the airport. Another factor is that we were both fatigued. I was due to the fact it was my 7TH day on duty due to adding a day to my previous sequence. As to exactly why we were flying direct joray; I do not know. The controller also wasn't sure and made no deal about it other than directing us to bgdog. I certainly believe that 7 days on duty is setting one up for making errors and missing information. Even though there was a full 26 hours between my 2 sequences making me 'legal' for them; I believe that operationally you are way too tired at the end of the 7TH day to be on your 'a' game.

Original NASA ASRS Text

Title: B737-800 FLT CREW HAS A TRACK HDG DEVS ENRTE MIA.

Narrative: ON TRAVELING BTWN DIW AND THE POINT JORAY; ATC INQUIRED WHERE WE WERE GOING AND THAT HE WAS NOT USED TO US BEING ON THAT PARTICULAR RTE. I LOOKED AT THE FMC AND WE WERE PROCEEDING DIRECT JORAY. HE THEN SAID WE SHOULD PROCEED DIRECT BGDOG AND THEN TO JORAY. NOTHING ELSE WAS SAID AFTER THIS. WE WERE DEVIATING FOR WX AFTERWARD; AND THEN PROCEEDED UNEVENTFULLY TO MIA. WE HAD BEEN GIVEN DIRECTS PRIOR TO THIS AND POSSIBLY WE LOST THE AR22 PORTION OF THE FLT PLAN. WE ALSO WERE PREPARING FOR THE UPCOMING WX ENRTE TO MIA AND WHAT OUR PLAN OF ATTACK WOULD BE IN NAVING THROUGH IT. WE WERE ALSO REVIEWING UPDATES TO THE MIA ATIS WHEN THEY WOULD COME OUT DUE TO TSTM ACTIVITY AT THE ARPT. ANOTHER FACTOR IS THAT WE WERE BOTH FATIGUED. I WAS DUE TO THE FACT IT WAS MY 7TH DAY ON DUTY DUE TO ADDING A DAY TO MY PREVIOUS SEQUENCE. AS TO EXACTLY WHY WE WERE FLYING DIRECT JORAY; I DO NOT KNOW. THE CTLR ALSO WASN'T SURE AND MADE NO DEAL ABOUT IT OTHER THAN DIRECTING US TO BGDOG. I CERTAINLY BELIEVE THAT 7 DAYS ON DUTY IS SETTING ONE UP FOR MAKING ERRORS AND MISSING INFO. EVEN THOUGH THERE WAS A FULL 26 HRS BTWN MY 2 SEQUENCES MAKING ME 'LEGAL' FOR THEM; I BELIEVE THAT OPERATIONALLY YOU ARE WAY TOO TIRED AT THE END OF THE 7TH DAY TO BE ON YOUR 'A' GAME.

Data retrieved from NASA's ASRS site as of January 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.