CHARTER SMT TRACK HDG DEV.

Narrative

ATC CLRNC WAS FROM SAN ANGELO; TX (SJT) VIA V68 TO CENTER POINT VOR (CSI) V161 TO THREE RIVERS VOR (THX) DIRECT TO ALICE VOR (ACI) DIRECT TO HARLINGEN ARPT. AFTER REACHING THE ALICE VOR I PROCEEDED TO THE HARLINGEN ARPT. THE ONLY NAV FACILITY ON THE FIELD IS THE LOC FOR RWY 17R. OVER ALICE I WAS RECEIVING SEBAS LOM SO I TOOK A HDG TO INTERCEPT THE LOC AND TRACK DIRECTLY TO THE ARPT. AFTER A FEW MINS I WAS ASKED BY KINGSVILLE APCH WHICH RADIAL I WAS TRACKING FROM ALICE VOR. I INFORMED HIM THAT I WAS PROCEEDING DIRECT TO SEBAS. I QUICKLY CHKED THE RADIAL AND RPTED ON THE 145 DEG RADIAL. A FEW MORE MINS PASSED AND KINGSVILLE ASKED IF I WAS OVER THE LOC COURSE. I RPTED THAT I WAS INTERCEPTING THE LOC COURSE FROM HRL ARPT AT THAT TIME. KINGSVILLE APCH THEN INFORMED ME THAT HE WONDERED WHY I DID THAT SINCE THERE WAS NO INDICATION OF THAT ON THE FLT PLAN. ATC (KINGSVILLE) ALSO INFORMED ME THAT THE ALICE VOR RADIAL TO HARLINGEN WAS THE 157 DEG RADIAL. I ACKNOWLEDGED THIS INFO AND WAS SWITCHED TO VALLEY APCH CTL. I WAS CONFUSED AS TO THE RTE I WAS SUPPOSED TO TAKE. I HAD FILED DIRECT TO THE ARPT AFTER ALICE VOR. THE 157 DEG RADIAL WOULD HAVE TAKEN ME TO THE SEBAS LOM JUST N OF THE ARPT. I FLEW THE MOST DIRECT RTE USING THE AVAILABLE NAV AIDS LOCATED ON THE FIELD. I FLEW TO INTERCEPT THE 175 DEG BEARING TO THE SEBAS LOM UNTIL I RECEIVED A RELIABLE NAV SIGNAL FROM THE LOC AND TRACKED DIRECTLY TO THE ARPT. I DON'T KNOW IF THE CTLR THOUGHT I WAS FIRST GOING TO THE HRL VOR THEN TO THE ARPT OR WHAT. THE SVC VOLUME OF THE ALICE VOR IS 40 NM SO I HAD TO USE THE NEXT AVAILABLE NAV AID OF EITHER THE LOM OR LOC.