HDG DEV; ENCROACHES ON OTHER SECTOR AIRSPACE.

Narrative

DEPARTING KAHULUI; MAUI; MAUI 4 DEP; VECTORS TO THE JULIE 2 ARR; LANAI TRANSITION; 278 DEGS OF LANAI TO HONOLULU EVENTS: ALL CONDITIONS NORMAL. AFTER DEP; FOLLOWING SID PROCS; WE WERE GIVEN A COUPLE OF HDG CHANGES AND ALTS TO CLB TO. TO THE BEST OF MY MEMORY; ATC HAD ASKED US WHAT WAS OUR HDG. I REPLIED 270 DEGS. SHE ASKED US; WAS THIS HDG YOUR OWN CORRECTION MAKING? I REPLIED; YES; AS WE WERE STILL TURNING TO OUR ASSIGNED HDG. NOTE: WE WERE GIVEN; I BELIEVE; HDG 240 DEGS; BUT THAT WAS NOT IN THE HDG CTL KNOB. DURING THIS TIME I DON'T RECALL IF I WAS IN MY FLT BAG LOOKING AT THE SID OR ADJUSTING MY HEADSET; BUT I KNEW HDG 240 DEGS WAS NOT CORRECT. WHEN I LOOKED UP I COULD SEE WE WERE HUGGING THE SHORE LINE OF MOLOKAI ISLAND. DURING THIS TIME I NOTICED THE CAPT; WHO WAS FLYING; WAS TRYING TO USE THE INS SYS. ALL I KNEW THE HDG WHICH 'I' PRESET ORIGINALLY WAS NOT IN VIEW AND NOW I WASN'T SURE WHAT OUR ORIGINALLY ASSIGNED HDG WAS -- 'NEITHER DID THE CAPT.' I THEN ASKED ATC WHAT WAS THE PROBLEM. SHE INDICATED THAT YOU WERE GOING INTO ANOTHER SECTOR AIRSPACE. THEN SHE ASKED WHAT WAS YOUR LAST ASSIGNED HDG. I STARTED FROM THE BEGINNING DEP. FIRST HDG 300 DEGS; THEN L 240 DEGS? MOMENTS LATER; THAT'S WHEN WE WERE NOTIFIED. ALL WE WERE GIVEN FROM ATC WAS HDG AND ALT CONDITIONS. TFC WAS LIGHT; NOT VERY MANY ACFT ON THE RADIO. I FEEL THAT THE PF SHOULD HAVE RESPONDED TO ME THAT HE WAS ARRANGING THE HDG SELECTOR AND THAT HE WAS GOING TO USE THE INS SYS. ALTHOUGH BOTH OF US WERE NOT SURE OF THE HDG CHANGE; I FELT IT WAS NECESSARY TO RPT THAT THIS CREW WAS NOT PAYING CLOSE ATTN TO DETAILS AND VIEW THIS AS NEGLIGENCE ON CREW MEMBERS SHOULD THIS BE A PROBLEM. AS THIS WAS OUR LAST LEG BEFORE GOING OFF DUTY; NEITHER OF US DISCUSSED THIS MATTER.