As a DiveMaster Candidate I was wanting to know the test breakdown so I would know about what my goals should be. I hope this is helpful for someone else as it was for me.
400 yard swim
no aids such as fins, snorkel or mask using any stroke or combo of strokes)
6 minutes or less = 5 pts
6 - 8 minutes = 4 pts
8 - 10 minutes = 3 pts
10 - 12 minutes = 2 pts
12 minutes = 1 pt
15 minute water tread
(using no aids, hands must be out of water for last 2 minutes)
Perform satisfactorily = 5 pts
Stayed afloat but hands not out of water for 2 mins = 3 pts
Used side or bottom but no more than twice = 1 pt
800 yard timed snorkel swim
(using mask, fin, and snorkel but no BC/floatation aid, face in water without using arms to swim, nonstop)
13 minutes or less = 5 pts
13 - 15 minutes = 4 pts
15 - 17 minutes = 3 pts
17 - 19 minutes = 2 pts
Over 19 minutes = 1 pt
100 yard rescue diver tow
(wearing full scuba, push or tow diver 100 yards nonstop)
2 minutes or less = 5 pts
2 - 3 minutes = 4 pts
3 - 4 minutes = 3 pts
4 - 5 minutes = 2 pts
Over 5 minutes = 1 pt
You must score 12 out of possible 20 points to pass these tests