In this fourth episode of the series, Alex Otte shares one of the key findings from the Boating Under the Influence Report and Dashboard. The expectation carried by much of the public is that as long as a person stays below the legal limit, 0.08 percent, that there are not at risk of impairment. Although there have been many studies to indicate the falsehood in that idea, claiming that impairment can occur at any blood alcohol content level upon a departure from 0.0 percent, this is of particular interest to the boating community. Given the compounding environmental stressors of an on-water setting, to include sun, heat, wind and the motion of the vessel, impairment can occur at a much lower blood alcohol concentration. Because low BAC’s present greatly increasing relative risk in an on-water situation, alcohol use may actually be more hazardous on a boat than in other settings