FLT CREW OF WDB ENTERED ERRONEOUS DEP RADIAL ON VOR DURING SEL 1S DEP FROM RKSI. CONTRIBUTING FACTOR WAS THE NONSTANDARD FORMAT OF THE DEP PAGE WHICH DID NOT INCLUDE AIRWAY RADIAL INFO.

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WE DEPARTED RKS1 IN HVY RAIN; TURB; WINDSHEAR; TSTMS AT NIGHT. IT WAS A MAX GROSS WT TKOF. FO FLYING. MY FIRST TIME INTO INCHEON. WE HAD FLOWN ON PREVIOUS DAYS XXX/PANC/VHHH WITH 28 HRS OFF IN ANC ONLY XA34 IN HKG. THE FO PROGRAMMED IN ALL INTXNS ON THE 20-3A PLATE FOR THE SEL IS DEP. THE CLRNC WAS ANYANG DEP -- ANYANG G597. WE DEPARTED INCHEON AND FLEW THE PROFILE; LOOKED AT 20-3A FOR OUTBOUND RADIAL FROM SEL FOR G597; NONE SHOWN ON PLATE. FLIPPED BACK TO 10-1 PICKED UP G597 E OF KAE; SET IN 128 DEG RADIAL FOR FO TO FLY; TOLD HIM TO FOLLOW IT. NOTICED INS SHOWED RAPID DEV R OF PROGRAMMED TRACK. COLLECTIVELY WE FIGURED OUT WHAT I HAD DONE RESET IN 086 DEG RADIAL; CORRECTED BACK L AS ATC WAS ASKING WHAT OUR HEADING WAS; PICKED UP THE 080 DEG RADIAL. WHEN I LOOKED AT 10-1 AT KAE THE 2 AIRWAYS AND THE HVY ARROW LOOKED LIKE THE AIRWAYS AND ARROW AROUND SEL VOR. WE ESTIMATE WE DEVIATED 1-2 MI OFF COURSE. ATC NEVER QUESTIONED US ABOUT IT. THE PROB COULD BE AVOIDED IN FUTURE BY PUTTING THE OUTBOUND RADIAL DEGS FOR ALL THE OUTBOUND AIRWAYS FROM BOTH SEL AND OSN VOR ON THE 20-3A PAGE.