RYA/MCA Advanced Powerboat Certificate of Competence Examination\ The Advanced Powerboat Certificate of Competence (CoC) is a practical and oral examination assessing the skills, knowledge, and experience required to operate a powerboat safely by day and night in coastal waters. Candidates are tested on advanced boat handling, passage planning, navigation, meteorology, and emergency procedures, as well as their ability to command a vessel and crew. Successful candidates demonstrate sound judgement, seamanship, and competence to operate professionally or for leisure in challenging conditions.