B727 CREW HAD TRACK DEV ON THE MIA 1 SID FROM MIA.

Narrative

NAV ERROR. ASSIGNED HDG OF 090 DEGS TO INTERCEPT THE SKIPS TRANSITION. CAPT WAS FLYING AND HE HAD NAV SELECTED ON CDI. FO HAD VKZ 108 DEG RADIAL DISPLAYED ON CDI. PASSING APPROX FL210; ATC ADVISED US WE WERE 8 NM S OF COURSE. CAPT SELECTED RAJAY AS THE ACTIVE WAYPOINT AND ENGAGED AUX/NAV. ACFT TURNED R AND ROLLED OUT ON A HDG OF 170 DEGS. CAPT IMMEDIATELY TURNED ACFT BACK L TO A LESSOR INTERCEPT ANGLE. PASSING 150 DEG HDG; ATC ASKED US TO EXPEDITE CLB TO FL250 AND TURN L TO 090 DEGS AS WE WERE CONVERGING WITH CLBING TFC TO THE S. TCASII SHOWED THE TFC AT 8 NM 1500 FT BELOW AT OUR 4 O'CLOCK POS. AT NO TIME DID WE COME ANY CLOSER THAN 8 NM TO THE TFC. WE WERE PASSING FL240 WHEN ASKED TO EXPEDITE CLB. LEVELED OFF AT FL250 HDG 090 DEGS. REMAINED ON THIS HDG FOR SEVERAL MINS THEN SWITCHED SECTOR CTLRS. NEXT CTLR CLRED US DIRECT ILURI. ATC APPARENTLY STOPPED THE CLB OF THE OTHER ACFT DURING ALL THIS UNTIL WE WERE ESTABLISHED ON THE 090 DEG HDG END OF INCIDENT. ALTHOUGH ATC RPTED US S OF COURSE; COPLT RAW DATA SHOWED US 1.5 DOTS N OF COURSE (108 DEG RADIAL.) THIS INITIAL CONFUSION; ALONG WITH THE CAPT'S RAPID CORRECTIVE ACTION THE GFMS; LEFT ME (THE COPLT) UNSURE WHERE WE WERE GOING AND WHAT THE GFMS WAS DOING FOR SEVERAL SECONDS. PF FAILED TO BRIEF PNF AS TO THE GFMS AND AUTOPLT SETUP AND THE PNF FAILED TO MAINTAIN SITUATIONAL AWARENESS OF THE NAV. AS THE PNF; I WAS OVERLY ENGROSSED IN RADIO COM WITH CTR CONCERNING TURB ALONG ASSIGNED RTE AND ATC REPEATEDLY ASKING WHAT OUR FINAL ALT WAS TO BE FOR THE FLT. THE MIA 1 ROUTINE DEP CAN QUICKLY BECOME A CAN OF WORMS.