FLC OF A LOCKHEED 4 ENG JET STAR; PENETRATED THE P56 PROHIBITED AIRSPACE DURING RWY 36 DEP AT DCA ARPT DUE TO THEIR UNFAMILIARITY WITH RWY 36 NOISE ABATEMENT PROCS.

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IT WAS A NICE DAY AT DCA ARPT. WE ARRIVED OUR NORMAL 1 1/2 HRS PRIOR TO DEP. I CHKED THE WX; NOTAMS; AND FILED FLT PLANS WITH LEESBURG FSS. I THEN GAVE THE FBO THE FUEL ORDER; ENOUGH TO COMPLETE THE NEXT 2 LEGS OF OUR ITINERARY. AFTER PREFLTING THE ACFT; I INSTRUCTED THE COPLT TO COMPLETE THE COCKPIT CHKS; TKOF DATA AND GET OUR IFR CLRNC. I WENT BACK IN THE CABIN TO ORGANIZE A FEW THINGS WHEN I RECEIVED A PAGE THAT THE PAX WOULD BE ARRIVING 30 MINS EARLY. I INFORMED THE COPLT AND ASKED HIM TO GET OUR IFR CLRNC. AFTER MY COPLT GOT THE CLRNC; HE CALLED BACK 2 MORE TIMES TO CLARIFY IT. I DIDN'T HEAR THE CLRNC OR READBACK SINCE HE WAS ON HIS HEADSET AND THE COCKPIT SPEAKER WAS TURNED OFF. HE READ THE CLRNC TO ME AND SAID WE WERE CLRED THE 'NOISE ABATEMENT PROCS.' I'M NOT SURE HE HAS EVER FLOWN THIS PROC AT DCA BEFORE. THE ACTUAL CLRNC WAS DEPART NW NOISE ABATEMENT PROC. I TAXIED OUT TO THE RWY BEHIND SEVERAL ACFT; IT WAS A TYPICAL BUSY DAY AT DCA. I BRIEFED THE COPLT THE NOISE ABATEMENT PROCS FROM MEMORY BUT FORGOT TO INCLUDE FOLLOW THE RIVER. INSTEAD I STATED RWY HDG TO 5000 FT RADAR VECTORS TO OUR ASSIGNED FIX. AFTER I COMPLETED MY BRIEF; I ASKED IF THERE WERE ANY QUESTIONS. COPLT RESPONDED; 'NO.' THE DEP PROC WAS UNDERNEATH THE ARPT DIAGRAM ON HIS APCH PLATE HOLDER; LOCATED ON THE YOKE IN FRONT OF HIM. I FAILED TO PHYSICALLY HOLD THE DEP PLATE IN MY HAND AND BRIEF FROM THE PLATE. SHORTLY AFTER TKOF; DEP ASKED IF WE WERE IN THE TURN YET. I IMMEDIATELY REMEMBERED ABOUT THE POTOMAC RIVER DOWN TO MY L AND COMMENCED A TURN TO FOLLOW THE RIVER. I WAS THEN TOLD TO COPY DOWN A PHONE NUMBER AND CALL IT WHEN I LANDED. CONTRIBUTING FACTORS: 1) THE COCKPIT SPEAKER WAS NOT ON; AND THE ENTIRE CREW DID NOT HEAR THE IFR CLRNC OR READBACK. 2) THE DEP BRIEF WAS DONE FROM MEMORY INSTEAD OF PHYSICALLY READ FROM THE PLATE. 3) THE COPLT DID NOT READ BACK COMPLETE CLRNC NOR READ ALL OF THE DEP PROCS FROM THE PLATE. 4) PAX ARRIVING 30 MINS EARLY. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: RPTR STATED THAT HE HAD RECEIVED NOTICE FROM THE FAA REGARDING INVESTIGATION OF THIS INCIDENT. HE ALSO STATED THAT HE HAD RECEIVED SIMULATOR TRAINING ON ALL THE DCA DEPS AND ARRS IN ORDER TO ASSURE THAT THIS WOULD NOT HAPPEN AGAIN. SUPPLEMENTAL INFO FROM ACN 384560: WHEN WE LANDED AT SFB; WE ALSO WERE TOLD TO CALL THE SECRET SVC. THIS WHOLE EVENT AROSE BY NOT PROPERLY READING DEP PLATE AND NOISE ABATEMENT PROCS. ALSO; THINKING THAT CAPT WAS FAMILIAR WITH DEP AND NOT QUESTIONING HIM. CONTRIBUTING FACTORS WERE MY NON FAMILIARITY WITH DEP PROCS. I WILL NEVER AGAIN TAKE INTO CONSIDERATION THAT THE CAPT ALWAYS KNOWS THE DEP PROC. I WILL ALWAYS; FROM NOW ON; READ ALL DEP PLATES THOROUGHLY; AND MAKE SURE THAT THE CAPT KNOWS THEM TOO.