BUI Defense Strategies in Tennessee

No two BUI cases are identical, but several defenses arise consistently in Tennessee cases. We analyze each of the following when building a client’s defense.

Lawfulness of the Stop or Boarding

TWRA officers are authorized to conduct safety inspections, but a boarding or detention must stay within constitutional limits. Evidence obtained through an unlawful stop or a detention that exceeded its lawful scope may be subject to suppression.

Field Sobriety Test Reliability

Standard field sobriety tests are designed for dry land. When administered on a rocking dock or boat, wave motion and the physical effects of time on the water compromise balance and coordination independent of alcohol. Results obtained in that environment can be challenged as an unreliable indicator of impairment.

BAC Test Administration and Equipment

A BAC result isn’t automatically valid. Improper administration, faulty or incorrectly calibrated equipment, failure to follow established testing procedures, and certain medical conditions can all affect the reliability of a breathalyzer or blood test. These are areas we examine in every case.

Whether the Defendant Was Operating the Vessel

Tennessee BUI law requires that the defendant was operating the vessel at the time of the stop. Simply being present on a boat isn’t enough. If the state can’t establish operation, the charge may not hold.

Implied Consent and Refusal Consequences

Tennessee’s implied consent law applies to BUI stops. Refusing a breathalyzer or blood test can result in suspension of your boating privileges, and the refusal itself is admissible as evidence in court. How a refusal affects your case is part of the early defense analysis.

Per Se BAC vs. Impairment-Based Charges

Tennessee prosecutes under both theories. If your BAC was at or above 0.08%, a legal presumption of impairment attaches, but that presumption can be contested. If your BAC was below the threshold, the state may still pursue an impairment-based charge based on officer observation. We analyze both when building a defense.

Frequently Asked Questions

Is a BUI a felony in Tennessee?

A first, second, or third BUI under TCA § 69-9-217(a) is a Class A misdemeanor. A fourth BUI within a 10-year period may be charged as a felony, which can carry more than one year in prison.

What Is the BAC Legal Limit for Operating a Boat in Tennessee?

The per se limit under TCA § 69-9-217 is 0.08%, the same threshold as DUI. You can also be charged if a TWRA officer determines your ability to operate the vessel was impaired even at a lower BAC.

What Happens If I Refused the Breathalyzer During My BUI Stop?

Tennessee’s implied consent law applies. A refusal can result in suspension of your boating privileges, and the refusal is admissible as evidence in court.

When Should I Contact a BUI Attorney?

As soon as possible after the arrest. Pretrial diversion isn’t available under Tennessee BUI law, and the defense investigation, preserving evidence, evaluating the legality of the stop, and identifying weaknesses in the state’s case, needs to begin promptly.