For various Dive Professional programs additional Cue Cards/Wetnotes and/or Evaluation Slates must be purchased mandatorily by each Dive Professional. These In-Water Slates provide a training reference while being under water to ensure that all performance requirements are met. Each Extended Range Instructor Candidate must purchase the Extended Range Instructor Package which contains the cue cards/wetnotes for all Extended Range Open Circuit Programs and Overhead Environment programs to come.