CAPT OF A CPR MLG OVERSHOT MISSED APCH CLRNC ALT.

Narrative

WE WERE ON APCH TO TEB ILS RWY 6. SEVERAL AIRPLANES HAD LANDED BEFORE US. A LEAR JET LANDED JUST BEFORE US AND RPTED BRAKING ACTION POOR TO NIL. WE CANNOT ATTEMPT A LNDG WITH RPTED NIL BRAKING. WHILE THE TWR CTLR ASKED OUR INTENTIONS THE PF INITIATED A MAP WHICH HAS A 2000 FT ALT RESTR. BY THE TIME I (PNF) HAD RELAYED OUR INTENTIONS TO GO TO EWR AND THE CTLR GAVE US A HDG OF 060 DEGS AND 1500 FT WE WERE ALREADY AT 2000 FT. THE CTLR CALLED US ON OUR 2000 FT ALT AND POINTED OUT THAT WE NEEDED TO MAINTAIN 1500 FT. HE THEN SWITCHED US TO DEP AND WERE CLRED TO 3000 FT AND THEN SHORTLY AFTER 5000 FT. I CAN UNDERSTAND AND SUPPORT RADAR VECTORS DURING A REJECTED APCH; HOWEVER THE LOWER THAN STANDARD ALT WAS UNEXPECTED. IT WAS NONSTANDARD FOR THE MISSED APCH PROC SINCE WE ONLY HAD 900 FT TO CLB TO MAP ALT. IN A G-IV THAT IS ONLY A MATTER OF 15 SECONDS. WE WERE FLYING THE AIRPLANE WHICH WAS OUR FIRST RESPONSIBILITY. I DON'T KNOW WHAT THE REASON FOR THE 1500 FT ALT WAS; BUT I THINK THAT FLYING THE APCH AND THE MAP IS A CRITICAL PHASE OF FLT AND STANDARD ALT SHOULD BE ADHERED TO WHENEVER POSSIBLE OR AN EXPLANATION PROVIDED IF POSSIBLE.