Narrative:

Tracking down J-79 south at FL310 from charleston (chs) VOR 113.5 to ormond beach (omn) VOR 112.6 on the high altitude chart (7/8) at intersection milie, switched over to omn VOR and tracked inbound on the 356 degree radial to omn VOR. Approximately 2 mins after passing milie intersection, ZJX called and stated to turn left to a southwest heading for vectors to rejoin J-79. He showed our flight path to be approximately 5 mi off course to the west and that he had traffic in our area and was concerned about separation. I checked the chart and realized that at milie intersection instead of dialing in omn VOR to track inbound, I should have dialed in savannah (sav) VOR 112.70 and tracked outbound on the 185 degree radial until paced intersection (91 DME from sav VOR) and then switch over to omn VOR and track inbound on the 356 degree radial to omn. That 14 DME segment between milie and paced intxns on J-79, if not tracked properly will get one's position close to J-121. After some vectoring, we continued on course. The ATC controller also stated that this was the 2ND or third aircraft on his shift to get off course at that intersection of milie to paced on j- 79, heading south. Looking at the chart, it looks almost like a straight line from milie intersection to omn VOR and that is why I did not dial in sav VOR to track J-79 properly. I also missed seeing the 91 DME and arrow marker placed by paced intersection. I will be very careful in the future in chart reading but if other air crews are missing this small intersection segment on a regular basis this problem might need to be addressed. A solution might be that the chart could highlight that segment between milie and paced differently or maybe a bigger arrow and distance lettering to emphasize the segment.

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Original NASA ASRS Text

Title: TRACK DEV. MISREAD CHART.

Narrative: TRACKING DOWN J-79 S AT FL310 FROM CHARLESTON (CHS) VOR 113.5 TO ORMOND BEACH (OMN) VOR 112.6 ON THE HIGH ALT CHART (7/8) AT INTXN MILIE, SWITCHED OVER TO OMN VOR AND TRACKED INBOUND ON THE 356 DEG RADIAL TO OMN VOR. APPROX 2 MINS AFTER PASSING MILIE INTXN, ZJX CALLED AND STATED TO TURN L TO A SW HDG FOR VECTORS TO REJOIN J-79. HE SHOWED OUR FLT PATH TO BE APPROX 5 MI OFF COURSE TO THE W AND THAT HE HAD TFC IN OUR AREA AND WAS CONCERNED ABOUT SEPARATION. I CHKED THE CHART AND REALIZED THAT AT MILIE INTXN INSTEAD OF DIALING IN OMN VOR TO TRACK INBOUND, I SHOULD HAVE DIALED IN SAVANNAH (SAV) VOR 112.70 AND TRACKED OUTBOUND ON THE 185 DEG RADIAL UNTIL PACED INTXN (91 DME FROM SAV VOR) AND THEN SWITCH OVER TO OMN VOR AND TRACK INBOUND ON THE 356 DEG RADIAL TO OMN. THAT 14 DME SEGMENT BTWN MILIE AND PACED INTXNS ON J-79, IF NOT TRACKED PROPERLY WILL GET ONE'S POS CLOSE TO J-121. AFTER SOME VECTORING, WE CONTINUED ON COURSE. THE ATC CTLR ALSO STATED THAT THIS WAS THE 2ND OR THIRD ACFT ON HIS SHIFT TO GET OFF COURSE AT THAT INTXN OF MILIE TO PACED ON J- 79, HDG S. LOOKING AT THE CHART, IT LOOKS ALMOST LIKE A STRAIGHT LINE FROM MILIE INTXN TO OMN VOR AND THAT IS WHY I DID NOT DIAL IN SAV VOR TO TRACK J-79 PROPERLY. I ALSO MISSED SEEING THE 91 DME AND ARROW MARKER PLACED BY PACED INTXN. I WILL BE VERY CAREFUL IN THE FUTURE IN CHART READING BUT IF OTHER AIR CREWS ARE MISSING THIS SMALL INTXN SEGMENT ON A REGULAR BASIS THIS PROB MIGHT NEED TO BE ADDRESSED. A SOLUTION MIGHT BE THAT THE CHART COULD HIGHLIGHT THAT SEGMENT BTWN MILIE AND PACED DIFFERENTLY OR MAYBE A BIGGER ARROW AND DISTANCE LETTERING TO EMPHASIZE THE SEGMENT.

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.