I am one that knows for a fact there are many stupid questions but that isn’t one. Go to the past results on the web page and possibly look at last year results. Link below. Starts with Flight 1 which is the youngest age group Gross Division. Then it gets split up by approximately 52 golfer per flight as the index gets higher and higher until the highest index for that age group. Then it starts with the Seniors Gross and does the same thing. It should make sense if you look at it for a few minutes.