I was flying from Boundary County Airport to Helena to get positioned for the Sky High Charter scenario 7, and did not read the ILS Z procedure correctly. I was cleared direct to the Helena VOR at or above 10,000 and then cleared to fly the ILS approach. I assumed that the procedure required that I fly to the IAF CUSDA and fly a DME arc around until established on the localizer.
But apparently I was supposed to fly a heading of 090 and use a procedure turn to get established on the localizer. The controller tried to kindly explain what I had done wrong, but I was too busy flying to really understand what she was telling me. Are there any videos or web pages that explain this chart? I'd sure like to understand what she was trying to tell me. Thanks.