DEP SF340 FLT CREW ENTERS THE AIRSPACE OVER SHEA STADIUM DURING AN IMPROPER DEP PROC FROM LGA; NY.

Narrative

FLT WAS RUNNING 15 MINS LATE DUE TO A LAST MIN; UNEXPECTED ACFT SWAP. ATIS WAS ADVERTISING THE LGA 9 DEP OFF OF RWY 13; FLUSHING CLB. SINCE TURBO PROP ACFT DEPARTING RWY 13 ALMOST EXCLUSIVELY USE THE WHITESTONE CLB; I MADE NOTE OF THE CHANGE. HOWEVER; WHEN I LOOKED UP THE PROC IN MY MANUAL; I APPARENTLY XPOSED THE FIRST PART OF THE WHITESTONE CLB ('TURN R; CLB ON A 180 DEG HDG UNTIL LGA 2.5 DME') WITH THAT OF THE FLUSHING CLB ('CLB ON RWY HDG UNTIL LGA 2.5 DME). THOUGH I READ THIS OUT LOUD; THE FO WAS WORKING ON THE WT AND BAL FORM; AND SO DID NOT CATCH MY ERROR. DURING TAXI; I RESTATED THE ERRONEOUS DEP PROC. THE FO; AGAIN; MADE NO COMMENT. HE MAY HAVE BEEN DISTR BY INTERPING OUR COMPLEX TAXI CLRNC. AFTER TKOF; I TURNED R TO THE 180 DEG HDG. THE FO STATED 'FLUSHING CLB' SEVERAL TIMES; TO WHICH I QUERIED 'ISN'T THIS THE FLUSHING CLB?' HE DIDN'T ANSWER. AT THIS MOMENT; THE BRIGHT LIGHTS OF SHEA STADIUM APPEARED AT OUR 12 O'CLOCK POS. NEW YORK DEP INSTRUCTED US TO TURN L TO A HDG OF 130 DEGS. NOTHING FURTHER WAS SAID; AND THE FLT PROCEEDED UNEVENTFULLY. WHAT WENT WRONG? 1) I STARTED THE BALL ROLLING BY MISREADING THE DEP PROC. THIS ERROR WAS AMPLIFIED BY OUR PERCEPTION OF A TIME CRUNCH; WHICH LED TO MY ALLOWING THE FO TO CONTINUE WORKING ON THE WT AND BAL FORM WHEN WE BOTH SHOULD HAVE BEEN READING THE DEP PROC. 2) DEP BRIEF DURING TAXI: IT MUST BE VERIFIED THAT BOTH CREW MEMBERS ARE PAYING FULL ATTN TO THE BRIEF; PARTICULARLY WHEN THERE ARE VARIATIONS TO NORMAL PROCS OR CLRNCS. IF THIS CAN'T BE ACCOMPLISHED 'ON THE ROLL;' STOP THE ACFT. 3) COM BTWN CREW MEMBERS MUST BE UNAMBIGUOUS. IF THE FO KNEW THE FLUSHING CLB REQUIRED RWY HDG; HE SHOULD HAVE SAID SO. GIVEN A SPECIFIC COURSE; I WOULD HAVE FOLLOWED HIS DIRECTION AND SORTED OUT MY MISTAKE LATER.