Christoph Law Offices, DUI & Criminal Defense
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Christoph Law Offices, DUI & Criminal Defense
Christoph Law Offices, DUI & Criminal Defense


  • Top Lawyers - San Diego Magazine
  • Former Deputy San Diego City Attorney
  • Former USMC Captain
  • Located Directly Across From Vista Courthouse
  • Over 150 Five Star Reviews on Google and Yelp

Attorneys William R. Christoph & Nicholas W. Christoph

Understanding California DUI Boating Laws: Stay Safe on the Water

by | Dec 4, 2023

California’s beautiful coastline and numerous lakes attract boaters from all around the state. However, just like driving on the roads, operating a boat under the influence of alcohol or drugs is illegal and dangerous. In this blog post, we will explore California’s DUI boating laws, their implications, and the importance of staying safe on the water.

1. Definition of DUI Boating:

DUI stands for “Driving Under the Influence,” but in California, it also applies to boating. Under California law, it is illegal to operate a vessel while under the influence of alcohol, drugs, or a combination of both. The term “vessel” includes not only motorized boats but also sailboats, jet skis, and other watercraft.

2. Blood Alcohol Concentration (BAC) Limits:

Similar to DUI laws for motor vehicles, California has established legal limits for BAC when operating a vessel. The BAC limits for boating are as follows:

  • 0.08% or higher for individuals 21 years of age or older.
  • 0.04% or higher for individuals operating a commercial vessel.
  • 0.01% or higher for individuals under 21 years of age.

3. Penalties for DUI Boating:

If convicted of DUI boating in California, you may face several penalties, including:

  • Fines: Depending on the circumstances, fines can range from up to several thousand dollars.
  • Jail Time: A first-time offense can result in possible county jail or alternative custody, while subsequent offenses may lead to longer incarceration periods.
  • Probation: DUI boating convictions often come with a probationary period, during which you must comply with specific conditions, such as attending alcohol or drug education programs.
  • Suspension of Boating Privileges: Your boating privileges may be suspended, meaning you are prohibited from operating any watercraft during the suspension period.
  • Ignition Interlock Device (IID): In some cases, the court may require you to install an IID on any vehicle you own or operate, including motorized boats.

4. Implied Consent and Chemical Testing:

Similar to DUI laws for motor vehicles, operating a vessel in California implies consent to chemical testing. If law enforcement has probable cause to believe you are boating under the influence, they can request a breath or blood test. Refusing to submit to these tests can result in additional penalties, such as a driver’s license suspension.

5. Enhanced Penalties:

Certain circumstances can lead to enhanced penalties for DUI boating, including:

  • Prior DUI Convictions: If you have prior DUI convictions, subsequent offenses will carry more severe penalties.
  • Injury or Death: Operating a vessel under the influence and causing injury or death can result in felony charges and substantial prison sentences.

Conclusion: California takes DUI boating laws seriously to ensure the safety of everyone on the water. Operating a vessel under the influence of alcohol or drugs poses significant risks to yourself, your passengers, and other boaters. By understanding and following these laws, you can enjoy California’s beautiful waterways responsibly while keeping yourself and others safe. Remember, if you plan to drink, assign a designated operator or arrange for alternative transportation to and from the water. Let’s keep our boating experiences enjoyable, memorable, and free from the dangers of impaired operation.



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I highly recommend Christoph Law Offices to everyone. Nick is a true professional who will go above and beyond for his clients. Thank you!
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