CAPT OF SMT PVT JET COULD NOT SEE THE RWY OR THE RWY ENVIRONMENT AFTER DSNDING TO MINIMUMS ON AN ILS INSTRUMENT APCH CAUSED BY ALLOWING THE ACFT TO NOT MAINTAIN THE DESIRED ILS TRACK DURING APCH; AND SUBSEQUENTLY CLBED TO; BUT DID NOT MAINTAIN; THE ASSIGNED MISSED APCH ALT.

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WHILE MAKING AN APCH INTO DAY ON THE ILS WE HAD TO EXECUTE A MISSED APCH. THE CHAIN OF EVENTS ARE AS FOLLOWS. I WAS THE FO ON A FLT FROM LAX TO DAY IN AN SMT JET. THE FLT WAS NORMAL UNTIL WE STARTED THE APCH INTO DAY. WE WERE SHOOTING THE ILS AND ALL WAS NORMAL UNTIL WE CROSSED THE OM. THE CAPT WAS FLYING AND I WAS CALLING ALT AND POS. HE WAS 3 DOTS L AND R OF COURSE AND WAS HAVING TROUBLE MAINTAINING THE GS AS WELL. WHEN WE REACHED 50 FT ABOVE DECISION HT I CALLED 'RWY IN SIGHT'. I COULD SEE THE APCH LIGHTING BUT NOT THE RWY. WE WERE A LITTLE R OF COURSE; THE CAPT SAID 'I DO NOT HAVE THE RWY IN SIGHT.' AGAIN I CALLED RWY IN SIGHT AND CALLED ITS POS AND POINTED AT THE RWY. HE AGAIN CALLED RWY NOT IN SIGHT! AT THAT TIME I ALSO LOST SIGHT OF THE RWY AND CALLED MISSED APCH TO THE CAPT. HE THEN SAID I'VE GOT IT AND RAPIDLY STARTED DSNDING. I STILL DID NOT HAVE THE RWY IN SIGHT. THE CAPT THEN SAID I'VE LOST IT. I TOLD HIM 'LET'S GO MISSED MAN!!!' I THEN CALLED THE TWR AND ADVISED WE WERE MISSED APCH AND WOULD NEED A TIGHT TURN BACK ON THE MARKER. THE CAPT SAID DO YOU WANT TO SHOOT THIS APCH? I TOLD HIM YES PLEASE. WHILE BEING VECTORED FOR THE NEXT APCH WE WERE ASSIGNED 3000 FT TILL ON THE ILS. I LOST 300 FT AND CORRECTED WHEN TWR CALLED FOR OUR ALT. THE TWR ADVISED THAT THEY HAD DECLARED AN EMER FOR US. WE TOLD THEM THAT THAT WAS NOT NECESSARY. THE SECOND APCH WAS NORMAL AND THE LNDG WAS UNEVENTFUL. AFTER LNDG WE WERE ASKED TO CALL THE TWR. I DID AND TOLD THE TWR WHAT HAD HAPPENED. THEY ASKED FOR THE REASON WE NEEDED A TIGHT TURN BACK TO THE MARKER AND I TOLD THEM IT WAS FOR FUEL CONSIDERATION (HAVING ENOUGH FUEL FOR OUR ALTERNATE AND 45 MIN THEREAFTER). HUMAN PERFORMANCE. I FEEL FACTORS AFFECTING THIS SITUATION WERE FATIGUE ON THE CAPT'S PART. THE FLT STARTED AT FTY WITH A FUEL STOP IN TX. WE THEN CONTINUED ON TO LAX. WE FUELED UP AND DEPARTED AND STOPPED IN KS FOR FUEL AND ONTO DAY. THE CAPT HAD FLEW THE ACFT THE ENTIRE FLT AND MADE ALL OF THE TKOFS AND LNDGS. I ASKED HIM IF HE WOULD LIKE FOR ME TO FLY SO HE COULD REST BUT HE SAID NO. AT NO TIME DID HE USE THE AUTOPLT DURING THE FLT. FLT TIME WAS APPROX 10 HRS.