ACR ON VISUAL APCH TO DCA ISSUED ATC GAR BUT NOT GIVEN ANY ALT ASSIGNMENT; REPORTER SUGGESTED MORE VISUAL APCH GAR GUIDANCE NEEDED.

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WE WERE CLRED FOR THE MT VERNON VISUAL APCH TO RWY 1 IN DCA. ON FINAL THE TWR CTLR ASKED US TO S-TURN FOR SPACING. THE CTLR HAD PUT AN ACFT IN POS ON OUR RWY AND WAS WAITING FOR AN RJ LNDG ON THE XING RWY TO LAND BEFORE CLRING THE ONE IN POS FOR TKOF. THE SPACING WAS NOT GOING TO WORK SO THE CTLR DIRECTED US TO GO AROUND AND FLY A HDG OF 050 DEGS. THE CTLR DID NOT; HOWEVER; GIVE US AN ALT TO CLB TO. THERE IS NO PUBLISHED MISSED APCH PROC OR ALT FOR THIS VISUAL APCH. AS WE CLBED OUT; WE WERE GOING TO DEFAULT TO THE MISSED APCH ALT OF THE UNDERLYING ILS APCH. THAT USED TO BE THE GUIDANCE IN OUR PLT HANDBOOK BUT I DON'T BELIEVE THAT IS CURRENTLY A PUBLISHED PROC. WE ASKED THE CTLR FOR AN ALT ASSIGNMENT AND A NEW VOICE CAME ON THE FREQ CLRING US TO 2000 FT AND CONTINUING THE TURN TO A HDG OF 180 DEGS. WE WERE VECTORED AROUND FOR ANOTHER VISUAL APCH AND LNDG. THE CTLR WAS TRYING TO GET THE MAX EFFICIENCY OUT OF THE AIRSPACE AVAILABLE AND THIS TIME THE TIMING BTWN ALL 3 ACFT (US ON APCH; 1 IN POS FOR TKOF AND 1 ON FINAL ON THE XING RWY) JUST DIDN'T WORK OUT. MY CONCERN; HOWEVER; IS THE LACK OF ALT GUIDANCE FROM THE CTLR AND THE LACK OF A PROC IN OUR BOOK FOR US TO FALL BACK ON; IN THE ABSENCE OF A CLRNC; SINCE MOST VISUAL APCHS HAVE NO PUBLISHED MISSED APCH PROC. CLEARER GUIDANCE IN THE PLT HANDBOOK IS NEEDED TO ADDRESS THIS POSSIBLE SITUATION. SPECIFICALLY; SINCE MOST VISUAL APCHS DO NOT HAVE A PUBLISHED MISSED APCH PROC; A PROC TO FALL BACK ON FOR VISUAL APCHS IF NO DIRECTION IS IMMEDIATELY PROVIDED BY ATC. THERE WAS; AT ONE TIME; SOME GUIDANCE IN OUR BOOK BUT I BELIEVE IT HAS BEEN REMOVED. IF THE GUIDANCE ALREADY EXISTS IN OUR PUBS; I WILL STAND CORRECTED AND WOULD LOVE TO KNOW WHERE IT IS SO I CAN PROMOTE IT TO OTHERS. SEVERAL OF US LOOKED FOR IT AND WERE UNABLE TO FIND IT.