So, I'm looking through the Discover Scuba Diving ( http://www.padi.com/padi/common/pdfs/kd/course/dsd.pdf ) instructor manual, and notice that Divemasters can do DSD's in a "confined open water" environment, but not "open water".
What is the definition of a "confined open water" environment?
What is the definition of a "confined open water" environment?