Michigan law prohibits anyone from boating while under the influence of alcohol or drugs. This includes operating any boat, sailboat, or PWC. 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.
In Michigan, you are considered to be under the influence of alcohol if your blood alcohol content is 0.08% or greater by weight of alcohol as determined by a breath, blood, or urine test.