Drivers hit the course one at a time, racing solo against the clock. Often, drivers use these times not only to set qualifying speeds, but to check out the boat set-up and help the crew figure out tweaks before race time.
A driver must complete one lap at a minimum speed of 130 mph to qualify for a race. It's a little different in Detroit, where drivers must complete two laps at an average speed of 130mph back-to-back during the same run.
Points are awarded to the fastest qualifiers during time trials. These points count towards the National High Points totals.