Narrative:

Departed san diego on the border 4 SID. We were given direct to poggi VOR and also issued traffic at our 12 O'clock position, which was about 2000 ft above us and climbing to 15000 ft. We would be climbing through the traffic's altitude up to FL270. We crossed the poggi VOR and as a technique, I selected the VOR (ipl) and course on the SID. The captain was looking for the traffic and apparently became distraction from selecting VOR/localizer or LNAV for the intercept course. Center called us and gave us a vector to get back on course. The fact that I selected the ipl VOR to remain ahead kept me from backing the captain up on the intended course. In the future, I will be certain of our selected course and FMS mode prior to selecting the next NAVAID.

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Original NASA ASRS Text

Title: ON CLBOUT FROM SAN, B737-300 CAPT BECOMES DISTR LOOKING FOR XING TFC AND FLT CREW MISSED SID COURSE CHANGE. ZLA CORRECTS HDG AND ISSUES TURN TO IPL VORTAC.

Narrative: DEPARTED SAN DIEGO ON THE BORDER 4 SID. WE WERE GIVEN DIRECT TO POGGI VOR AND ALSO ISSUED TFC AT OUR 12 O'CLOCK POS, WHICH WAS ABOUT 2000 FT ABOVE US AND CLBING TO 15000 FT. WE WOULD BE CLBING THROUGH THE TFC'S ALT UP TO FL270. WE CROSSED THE POGGI VOR AND AS A TECHNIQUE, I SELECTED THE VOR (IPL) AND COURSE ON THE SID. THE CAPT WAS LOOKING FOR THE TFC AND APPARENTLY BECAME DISTR FROM SELECTING VOR/LOC OR LNAV FOR THE INTERCEPT COURSE. CTR CALLED US AND GAVE US A VECTOR TO GET BACK ON COURSE. THE FACT THAT I SELECTED THE IPL VOR TO REMAIN AHEAD KEPT ME FROM BACKING THE CAPT UP ON THE INTENDED COURSE. IN THE FUTURE, I WILL BE CERTAIN OF OUR SELECTED COURSE AND FMS MODE PRIOR TO SELECTING THE NEXT NAVAID.

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.