No, it is illegal to operate a boat while under the influence of alcohol. Boating under the influence (BUI) is a serious offense and can result in legal consequences, similar to driving under the influence (DUI). According to the United States Coast Guard, it is illegal to operate a boat with a blood alcohol concentration (BAC) of 0.08% or higher. Additionally, alcohol can impair judgment, reaction time, and balance, which can increase the risk of accidents and injuries while boating. It is always best to have a sober operator when operating a boat.