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Chapter 4: The Legal Requirements of Boating
Alcohol and Drugs

Missouri law prohibits anyone from boating while intoxicated—that is, operating a vessel while intoxicated due to alcohol or any combination of alcohol, controlled substance or drugs. Alcohol and drugs cause impaired balance, blurred vision, poor coordination, impaired judgment, and slow reaction time. Alcohol contributes to about one-third of all boating accidents nationwide. Read more about the effects and risks of consuming alcohol in Chapter 5.

Missouri law states that it is evidence of intoxication if a person has a concentration of alcohol in his or her blood of 0.10% or more, based upon a chemical analysis of breath, blood or saliva.

Missouri law establishes the following penalties:

  • Those convicted of boating while intoxicated are guilty of a class B misdemeanor upon a first conviction. In addition to penalties for a Class B misdemeanor, those convicted will be required to complete and pass an approved boating safety course.
  • Upon a second conviction, a person is guilty of a class A misdemeanor.
  • Upon a third or subsequent conviction, a person will be guilty of a class D felony.
  • A person boating while intoxicated who causes the death or serious injury of another person will, upon conviction, be guilty of a felony.

By operating a vessel on Missouri waters, you have consented to be tested for alcohol or drugs if requested by a law enforcement official. If you refuse to be tested, you will be subject to arrest and punishment consistent with the penalties described above.

Don't drink and boat!

Areas of Impairment Due to Blood Alcohol Concentration (BAC)

Areas of impairment due to blood alcohol concentration

Because you can drink faster than your system can burn off the alcohol, there is an increasing level of alcohol in your blood. This level is referred to as Blood Alcohol Concentration (BAC).

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