AN ACR LTT DECLARED A FUEL EMER.

Narrative

DEPARTED SHD AT XA00 AM WITH 1150 LBS FUEL AND VFR WX (CURRENT AND FORECAST) FOR ARR TIME OF XB00 AT BWI. PROCEEDED UNEVENTFULLY UNTIL APPROX XA45 WHEN WX BEGAN DETERIORATING AT BWI (FOG). ADVISED ATC OF TIME TO MINIMUM FUEL WHEN WE BEGAN RECEIVING DELAYING VECTORS AS BWI CTLRS ATTEMPTED TO TURN THE ARPT AROUND. CTLRS PROVIDED PREFERENTIAL HANDLING WHEN ADVISED OF THIS AND BEGAN TO VECTOR US FOR APCH. APPROX 600 LBS OF FUEL ON BOARD AT THIS TIME. EXTENSIVE VECTORING PROCEEDED AS CTLRS CONTINUED TO WORK ACFT TO THE ILS RWY 10 APCH AT BWI. BEGAN APCH APPROX 15 MINS AFTER VECTORING BEGAN WITH 400-450 LBS FUEL ON BOARD (RESERVE FUEL). ACFT CONTINUED TO MAKE AND MISS AS FOG WAS PATCHY ON RWY 10. 2 PRECEDING MLGS COMMENCED APCH AND RPTED A MISSED APCH. WE WERE ESTABLISHED ON THE ILS AND CONTINUED THE APCH TO DECISION HT AND MISSED APCH AT THAT TIME. APPROX 350 LBS FUEL REMAINING. DECLARED AN EMER DUE TO FUEL AND REQUESTED AND RECEIVED IMMEDIATE VECTOR TO DCA. PROCEEDED DIRECT AND LANDED STRAIGHT IN ON RWY 21.