Narrative:

We were already behind schedule from the start of the day so there was a sense of urgency because I knew that we had a good chance of catching back up on this leg. Dispatch had filed us on the dall 8 departure in our flight plan so the first officer and I briefed that departure. Upon receiving our clearance; dfw changed our departure to the nobly 2 RNAV so we made the appropriate changes in the FMS and I began to brief the nobly 2. For some reason I read the text of that departure and came up with an initial heading of 155 degrees if departing from runway 17R which was our expected departure runway. So upon departing runway 17R; instead of engaging the RNAV; I stayed in heading mode and went almost directly over the first fix and kept going until we were questioned by departure and sent on direct to a fix. There are 2 reasons I believe why this happened. First was the fact that we were running behind schedule and I did not slow down and read the text correctly. Second is the text itself and how it is written -- the charts that we use are commercial ii charts. I know that had I slowed down I would have understood what the text was actually meaning versus my skewed interpretation; but I also believe the text could have been written in a better form.

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Original NASA ASRS Text

Title: CRJ Captain reports track deviation while departing via the NOBLY RNAV SID from DFW. Suggests confusing text on the commercial chart may have been a contributing factor.

Narrative: We were already behind schedule from the start of the day so there was a sense of urgency because I knew that we had a good chance of catching back up on this leg. Dispatch had filed us on the DALL 8 Departure in our flight plan so the First Officer and I briefed that departure. Upon receiving our clearance; DFW changed our departure to the NOBLY 2 RNAV so we made the appropriate changes in the FMS and I began to brief the NOBLY 2. For some reason I read the text of that departure and came up with an initial heading of 155 degrees if departing from Runway 17R which was our expected departure runway. So upon departing Runway 17R; instead of engaging the RNAV; I stayed in heading mode and went almost directly over the first fix and kept going until we were questioned by Departure and sent on direct to a fix. There are 2 reasons I believe why this happened. First was the fact that we were running behind schedule and I did not slow down and read the text correctly. Second is the text itself and how it is written -- the charts that we use are Commercial II Charts. I know that had I slowed down I would have understood what the text was actually meaning versus my skewed interpretation; but I also believe the text could have been written in a better form.

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.