What type of equipment must instructors demonstrate proficiency in?

Instructors are required to demonstrate proficiency in all equipment used during teaching and diving activities because this ensures they can effectively teach students how to use each piece of gear safely and properly. Proficiency in all equipment allows instructors to answer students' questions accurately, troubleshoot issues in real-time, and provide hands-on demonstrations that are essential for skill acquisition. This comprehensive understanding includes not just diving tanks, but also BC (Buoyancy Control) devices, regulators, weights, masks, fins, and any other gear that may be utilized during the course. Being well-versed in all aspects of diving equipment reinforces the instructor's credibility and enhances the overall safety and learning experience for the students.