[laminar]

In my lifeguard training, refresher courses and practices are constant.

For example, once you get certified as a pool or waterfront lifeguard, you must:
-re-certify in CPR every year
-take a guard recert test every two years

You are also encouraged to:
-participate in guarding competitions (this makes your procedures second nature)
-go to inservices on a regular basis
-volunteer for special events
-practice with other guards

I think it is a very effective strategy to keep safety freediver training current with as many refreshers as possible. Safety freediving is different from lifeguarding - it is so far not a paid position (perhaps it should be, that way you'd attract excellent divers - but I think it would help to be modeled after it.

Peter