Narrative:

Clearance read mlc J105-J78.pxv. Looking at the hi-5 chart, J105 extended out of rzc at 025 degrees. Both captain and first officer looked at chart and read J105 out of rzc as 043 degree radial. When you look at rzc, it appears J105 extends out the 043 degree radial because along the airway there exists no black box redesignating the airway. It appears J105 extends out the 043 degree radial. Usually at a fix if an airway changes, there is a black box with the airway written in it. At rzc, there is no box because this is not an airway, but a route connecting 2 fixes. A very confusion point.

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Original NASA ASRS Text

Title: HDG TRACK DEV BY A B737-800 FLT CREW WHEN THEY MISREAD THEIR HI ALT CHART, PICKING UP THE WRONG RADIAL FOR AIRWAY J105 OUT OF RZC.

Narrative: CLRNC READ MLC J105-J78.PXV. LOOKING AT THE HI-5 CHART, J105 EXTENDED OUT OF RZC AT 025 DEGS. BOTH CAPT AND FO LOOKED AT CHART AND READ J105 OUT OF RZC AS 043 DEG RADIAL. WHEN YOU LOOK AT RZC, IT APPEARS J105 EXTENDS OUT THE 043 DEG RADIAL BECAUSE ALONG THE AIRWAY THERE EXISTS NO BLACK BOX REDESIGNATING THE AIRWAY. IT APPEARS J105 EXTENDS OUT THE 043 DEG RADIAL. USUALLY AT A FIX IF AN AIRWAY CHANGES, THERE IS A BLACK BOX WITH THE AIRWAY WRITTEN IN IT. AT RZC, THERE IS NO BOX BECAUSE THIS IS NOT AN AIRWAY, BUT A RTE CONNECTING 2 FIXES. A VERY CONFUSION POINT.

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.