Progress Open Water Certification Complete & Continue Next Lesson Learn More SSI Open Water Certification 6 Lessons Chapter 1 - Your Body and Aquatic Pressure Chapter 2 - Using Your Scuba Gear Chapter 3 - Breathing Gas and Effect Chapter 4 - Plan and Buddies Chapter 5 - Ocean and Opportunities Chapter 6 - Experiences Open Water Certification Complete & Continue Next Lesson Learn More Add a video SSI Open Water Certification Chapter 4 - Plan and Buddies
