Narrative:

On departure out of jfk on the kennedy 7 departure (commercial chart) we turned approximately 6 mi early causing a traffic conflict (altitude separation). Our clearance (flight plan) was the kennedy 7 departure (departing runway 22R), wavey direct emjay-J174 on to miami. The captain was established on the jfk 156 degree radial approaching wavey. I had xtuned wavey off hto VOR 244 degree radial, at 64 DME. He looked cross-cockpit at my radial coming alive and mistook it for J174 and began a turn southwest approximately 6 mi early. Departure control noticed our early turn and called traffic at 1 O'clock and 6 mi at 13000 ft and told us to go back to 12000 ft. Suggestion: I have flown this departure many times and have always been perplexed as to the design of the departure. Here's why. On the departure plate, wavey can be cross-tuned off hto 244 degree radial at 64 DME. Emjay is defined on J174 off hto 234 degree radial at 66 DME. Actual distance between wavey and emjay is 11 mi (10 radials at 65 DME). On neither the kennedy 7 departure, the us low 47.48, the area chart, or the us hi 3.4 is 'both' wavey and emjay depicted. If it was, I believe this would have not have happened. By showing both intxns on the same chart would greatly aid in maintaining situational awareness!

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Original NASA ASRS Text

Title: CAPT OF A B727 FAILED TO FOLLOW FLT PLAN CLRNC BY TURNING EARLY DURING CLB RESULTING IN ATC INTERVENTION TO STOP CLB AND BRING RPTR'S ACFT BACK ON COURSE DUE TO A CONFLICT WITH OTHER TFC 1000 FT ABOVE. THE CAPT MISTAKENLY INTERPED THE SID FIX AS THE AIRWAY FIX 11 MI FURTHER ON THE SAME RADIAL. RPTR SUGGESTED THAT THE SID CHART SHOULD ALSO SHOW THE HIGH ALT AIRWAY FIX.

Narrative: ON DEP OUT OF JFK ON THE KENNEDY 7 DEP (COMMERCIAL CHART) WE TURNED APPROX 6 MI EARLY CAUSING A TFC CONFLICT (ALT SEPARATION). OUR CLRNC (FLT PLAN) WAS THE KENNEDY 7 DEP (DEPARTING RWY 22R), WAVEY DIRECT EMJAY-J174 ON TO MIAMI. THE CAPT WAS ESTABLISHED ON THE JFK 156 DEG RADIAL APCHING WAVEY. I HAD XTUNED WAVEY OFF HTO VOR 244 DEG RADIAL, AT 64 DME. HE LOOKED CROSS-COCKPIT AT MY RADIAL COMING ALIVE AND MISTOOK IT FOR J174 AND BEGAN A TURN SW APPROX 6 MI EARLY. DEP CTL NOTICED OUR EARLY TURN AND CALLED TFC AT 1 O'CLOCK AND 6 MI AT 13000 FT AND TOLD US TO GO BACK TO 12000 FT. SUGGESTION: I HAVE FLOWN THIS DEP MANY TIMES AND HAVE ALWAYS BEEN PERPLEXED AS TO THE DESIGN OF THE DEP. HERE'S WHY. ON THE DEP PLATE, WAVEY CAN BE CROSS-TUNED OFF HTO 244 DEG RADIAL AT 64 DME. EMJAY IS DEFINED ON J174 OFF HTO 234 DEG RADIAL AT 66 DME. ACTUAL DISTANCE BTWN WAVEY AND EMJAY IS 11 MI (10 RADIALS AT 65 DME). ON NEITHER THE KENNEDY 7 DEP, THE US LOW 47.48, THE AREA CHART, OR THE US HI 3.4 IS 'BOTH' WAVEY AND EMJAY DEPICTED. IF IT WAS, I BELIEVE THIS WOULD HAVE NOT HAVE HAPPENED. BY SHOWING BOTH INTXNS ON THE SAME CHART WOULD GREATLY AID IN MAINTAINING SITUATIONAL AWARENESS!

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.