Massachusetts has one of the strongest boating under the influence (BUI) laws in the nation. Massachusetts law prohibits anyone from operating a vessel while under the influence of alcohol, marijuana, or any controlled substance. Alcohol and drugs cause impaired balance, blurred vision, poor coordination, impaired judgment, and slower reaction times. Alcohol is a major contributor to boating accidents and fatalities.
Massachusetts law states that a person is considered to be boating under the influence (BUI) if he or she has a blood or breath alcohol concentration of 0.08% or greater.