Checklists are crucial tools for divers to ensure critical safety steps are not overlooked. They help mitigate human errors, especially when divers are tired or stressed, and should be used alongside proper training. An effective checklist should be clear and concise, with fewer than eight items per phase, and organized logically to support workflow. It’s vital for divers to confirm that actions have the desired effects, and peer-checking can enhance safety. Ultimately, using checklists correctly can promote a culture of reliability in diving.