SMT RETURNING FROM LIFE GUARD FLT. FO NOTES DISCREPANCY IN FLT PLAN INDICATING RNAV ABOARD WHICH IS INCORRECT. CAPT REFUSES TO ACCEPT ATC CLRNC TO DSND.

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I WAS DISPATCHED TO FLY A LIFEGUARD TRIP FROM NY27 ARPT TO POI W PALM BEACH THEN RETURN TO GROTON; CT. THIS INCIDENT OCCURRED NBOUND WHILE TALKING TO ZNY. FIRST I AM A NEW EMPLOYEE WITH THE COMPANY; TYPE RATED AS A CAPT PART 135; RIDING AS A FO WITH THE COMPANY CHIEF PLT. THE CHIEF PLT TAKES CARE OF ALL FLT PLANNING AND FILING OF PLAN WITHOUT ANY DISCUSSION WITH MYSELF. LATER I FOUND THAT THE CAPT IS FILING AS 'SLANT R' WHEN THE ACFT IS ONLY EQUIPPED AS 'A' NO RNAV. THEREFORE WE CANNOT ACCEPT ANY CLRNC DIRECT VIA RNAV. I FOUND THIS OUT ONLY AFTER WE HAD ACCEPTED SEVERAL CLRNCS AND WERE UNABLE TO COMPLY SOMETIMES MISSING OUR WAYPOINT BY AS MUCH AS 30 NM. SECOND: ABOUT 250 NM FROM OUR DEST ARPT ZNY STATED A CLRNC TO DSND TO FL370. AT THIS POINT THE CAPT TOOK THE RADIO AWAY AND REFUSED TO DSND BASED ON THE IDEA THAT WE WERE A LEAR JET AND SHOULD RECEIVE BETTER HANDLING FROM ATC. HE DID NOT DSND. SOME 50 MI LATER AND ABOUT 15 MINS OF ARGUING WITH ATC HE FINALLY COMPLIED. MY SIT HERE IS THIS: I MENTIONED TO THE CAPT ABOUT THE ACFT NOT HAVING AN RNAV AND TOLD HIM THAT THE FLT PLAN WAS A VIOLATION. I ALSO MENTIONED AND ASKED HIM NOT TO ARGUE WITH ATC AND PLEASE DON'T COMPLY WITH THEIR REQUEST UNLESS THERE IS AN EMER. HIS REPLY TO THIS IS THAT HE IS THE CAPT! I AM THE COPLT; AND NOT TO CONCERN MYSELF WITH HIS JOB. TO ME THIS COMPLETELY DEFEATS THE PURPOSE OF A 2 PLT CREW. I AM IN A SERIOUS SIT HERE BEING A NEW HIRE AND FLYING WITH THE CHIEF PLT. AS A YOUNG PLT I HAVE RUN INTO THIS EXPERIENCE SEVERAL TIMES IN MY AVIATION CAREER. I FEEL THAT MORE ATTN SHOULD BE GIVEN TO THE TRAINING OF THE CAPT -- FO AS A TEAM AND NOT A STUDENT (COPLT) INSTRUCTOR (CAPT) RELATIONSHIP.