ALT DEV ALT OVERSHOT.

Narrative

FIRST OF ALL; MY PRESENCE IN THE COCKPIT FOR DEP WAS NOT REQUIRED SINCE I WAS THE RELIEF PLT. HOWEVER; GENERALLY SPEAKING; MOST RELIEF PLTS SIT IN THE COCKPIT FOR TKOF AND LNDG. THE CAPT HAD JUST COME OFF OF NEWLY QUALIFIED STATUS WHEREAS THE FO WAS STILL NEWLY QUALIFIED. OUR FLT HAD BEEN CLRED THE KENNEDY 5 DEP WITH A CARNARSIE CLB WHICH INCLUDES A MAINTAIN 5000 FT ALT. JUST PRIOR TO TKOF THE ALT WAS CHANGED TO 4000 FT. AFTER TKOF I HEARD DEP CTL ISSUE A 90 DEG HDG. HOWEVER; THE SOFT-SPOKEN AND APPARENTLY SLOW TO COMPREHEND FO READ BACK 9000 FT AND 90 DEG (ACCORDING TO HIM) OF WHICH I ONLY HEARD 90 DEG. HE SUBSEQUENTLY RESET THE ALT ALERTER TO 9000. DURING THIS PERIOD OF TIME MY ATTN WAS FOCUSED ON THE CAPT'S FLYING SINCE HE WAS ATTEMPTING TO NAV TO CARNARSIE VOR WITHOUT THE FMS BEING PROGRAMMED IN NAV OR ANY SPECIFIC HDG SELECTED. CONSEQUENTLY; I FOUND MYSELF DISTR BY LOOKING OUTSIDE TO VERIFY OUR GND TRACK SINCE THE CAPT NEVER REALLY BRIEFED HOW HE WAS GOING TO FLY THE DEP TO CARNARSIE VOR. ALSO; WHILE THE FO WAS OCCUPIED WITH HIS SLOW RESPONSE TO DEP CTL; I NOTICED THE AIRSPD RAPIDLY APCHING THE SLAT LIMIT SPD TO WHICH I CALLED OUT 'SLATS'. BOTH CAPT AND FO SEEMED TO BE BEHIND THE AIRPLANE. I FELT OVERWHELMED BY THE AMOUNT OF XCHKING I WAS DOING. ANYWAY; AS WE TURNED TO THE 90 DEG HDG; DEP CTL CALLED OUT TFC AT 4500 FT WHICH WE SAW; ACKNOWLEDGED AND RECKONED TO BE NO FACTOR. AS WE WENT THROUGH ABOUT 5000-6000 FT DEP ASKED WHAT ALT WE WERE CLBING TO. WHEN THE FO RESPONDED 9000 FT; WE WERE TOLD THAT 4000 FT WAS OUR CLRED ALT; HOWEVER; CONTINUE CLB TO 9000 FT. IN HINDSIGHT; AN OBVIOUS CAUSE OF THIS PROBLEM WAS THE PAIRING OF A CAPT WITH JUST OVER 100 HRS AND A FO WITH LESS THAN 100 HRS IN AN ADVANCED/AUTOMATED 2 PLT ACFT. MORE FLT TIME IN ACFT TYPE SHOULD BE REQUIRED BEFORE SUCH PAIRINGS ARE ALLOWED. ALSO; CHANGING THE ALT OF THE SID JUST PRIOR TO DEP TO ALLOW FOR TCA TFC AT 500 FT INTERVALS IS ASKING FOR PROBLEMS DURING THIS CRITICAL PHASE OF FLT. SUCH OTHER TFC SHOULD HAVE BEEN CLRED OUTSIDE OUR WINDOW OF 2500- 5000 FT ON THIS DEP AND FINALLY; IF THE CAPT HAD USED ALL AVAILABLE NAVAIDS; MORE ATTN COULD HAVE BEEN GIVEN TO OTHER ASPECTS OF THE DEP BY EXTRA CREW MEMBERS.