Plenty of Confined Water work is included in this part of the course and here Chris is completing a Buddy Check on Patrick.

During the Confined Water part of the AI course, we practice a skill circuit of not less than 20 skills and they also have to present some Confined Water presentations during which they practice being an Open Water Scuba Instructor by dealing with 'students' (their fellow
IDC candidates) and deal with their real life problems.

After the Confined Water work is done, they practice a rescue
scenario, Rescue Exercise # 7 from the
Rescue diver course. Here Patrick's wondering if Chris is still alive!