To fight a BUI charge, you must first try to gather every piece of evidence that you can regarding the BUI stop. Your criminal defense lawyer must find out if law enforcement used video cameras to capture the stop, both on the water and dry land. There must be an inspection of the breath testing device that they used to gauge your BAC. Your attorney must investigate whether or not the breathalyzer was working properly when it was used to test your BAC, that it was properly calibrated, and that it was an approved device. An inquisitive DUI lawyer may also question law enforcement regarding their observations. Completing a thorough investigation is the most crucial aspect of a proper defense for a boating under the influence charge.