Oregon Revised Statutes Small Watercraft § 830.510

(1) At the trial of any civil or criminal action, suit or proceeding arising out of the acts committed by a person operating a boat while under the influence of any intoxicants, if the amount of alcohol in the person's blood at the time alleged is less than 0.08 percent by weight of alcohol and shown by chemical analysis of the person's breath or blood, it is indirect evidence that may be used with other evidence, if any, to determine whether or not the person was then under the influence of intoxicants.

(2) Not less than 0.08 percent by weight of alcohol in a person's blood constitutes being under the influence of intoxicating liquor.

(3) Percent by weight of alcohol in the blood shall be based on grams of alcohol per 100 milliliters of blood or based on grams of alcohol per 210 liters of breath.

(4) For purposes of ORS 830.505 to 830.545, “boat” means a motorboat or sailboat.