I played in my first store championship this past weekend, with ~30 players. I encountered something very surprising. Several people, including worlds level players, were measuring positions and distances on the table while deciding to barrel rolls or boost. They would say things like, "a boost would put me here, and that's not quite out of arc," using their hands/fingers to figure out where the ship would end up.
As I interpret the rules, this is a obvious violation of measurement rules. I have never done this, alway imagining the positions in my head. Pre measuring is specifically forbidden, correct?