You don’t need to be an Olympian but you should be comfortable in the water. The prerequisite test included:
- Being able to swim 300 yards continuously
- Exit the water without using steps or a ladder
- Tread water for 2 minutes using only legs and swim 20 yards
- Retrieve a 10 pound object in 7 to 10 feet of water and swim back to the starting point while holding the object with both hands
