DUI and BUI (boating under the influence) are siminlar offenses when it comes to the charges and penalties. The BUI charges and penalties are outlined in California Harbors and Navigation Code section 655. It is unlawful to operate a motor propelled vessel or motor propelled pulled equipment ( e.g. water skiis, aquaplane or similar towed equipment) on the water while under the influence of alcohol, a drug or a combination of alcohol and a drug. You may be arrested and charged with "Boating Under the Influence". This law applies to any vessel with a motor, whether it is the prime source of propulsion or not including sailboats. It does not apply to sailboats without motors, canoes, kayaks etc.