AFTER LNDG ON RWY 27 AT MYAM THE B190 CREW DOES A 180 DEGS TO TAXI BACK TO THE ONLY EXIT AND DISCOVER A C210 ALREADY ON THE RWY AFTER LNDG BEHIND THEM AND A KING AIR ON SHORT FINAL DEMANDING THE OTHER ACFT HOLD THEIR POS SO HE CAN LAND AS WELL.

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THERE WAS A LOT OF UNCTLED TFC TRYING TO LAND AT MHH IN THE BAHAMAS. WE ENTERED THE TFC PATTERN ON THE DOWNWIND HAVING MADE POS RPTS FROM AT LEAST 30 MI TO THE W OF THE FIELD ON THE CTAF. WE OBSERVED ON THE TCASII; FROM ABOUT 15 MI OUT ON THE DOWNWIND; AN AIRPLANE AT OUR 8 O'CLOCK POS; WHICH MAINTAINED VERY CLOSE PROX UP TO AND INCLUDING LNDG. ON SHORT FINAL FOR RWY 27 WE RECEIVED A TCASII TFC WARNING FROM THIS SAME ACFT FROM BEHIND US BUT WE DECIDED THAT LNDG AND NOT GOING MISSED WOULD BE THE SAFEST COURSE OF ACTION SINCE THE RWY WAS CLR. DUE TO HIGH VOLUME IN THE VICINITY USING THE CTAF; MANY AIRPLANES WERE NOT MAKING POS RPTS OR BEING STEPPED ON OR BLOCKED ON THE FREQ. AFTER ANNOUNCING OUR POS ON SHORT FINAL WE PROCEEDED TO LAND. UPON ANNOUNCING OUR BACK TAXI TO THE RAMP; AND WHILE STILL IN A 180 DEG TURN; WE REALIZED A C210 HAD LANDED DIRECTLY BEHIND US; WHILE WE WERE STILL ON THE RWY. EVEN MORE ALARMING WAS THE XMISSION OVER CTAF THAT A BEECH KING AIR WAS ON SHORT FINAL TO LAND. THE PLT WHOSE VOICE WOULD LATER BE RECOGNIZED AS THE CAPT FOR THE KING AIR INSTRUCTED US TO REMAIN AT THE END OF THE RWY SO THAT HE COULD LAND. I TOLD HIM THAT HE SHOULD NOT LAND; THAT THERE WAS A CESSNA IN THE MIDDLE OF THE RWY ALREADY AND THAT IT WAS A VERY UNSAFE SIT. WE MADE IT ABUNDANTLY CLR THAT 2 PLANES WERE ON THE RWY; AND THAT HIS FAILURE TO GO AROUND WOULD BE A COMPROMISE IN SAFETY THAT WE WERE NOT WILLING TO MAKE. THE KING AIR REFUSED TO AGREE AND LANDED WHILE WE PREPARED TO EXIT THE RWY INTO THE SAND; GRAVEL; AND NON PAVED AREA ADJACENT THE RWY; IF WARRANTED. ALL OF THESE ACFT THEN PROCEEDED TO BACK TAXI TO THE RAMP WITHOUT FURTHER INCIDENT. SEVERAL OTHER PLTS WITNESSED THE EVENT.