No, they are not paramedic certified. Also a PJ you are expected to be proficient in many aspects, such as extrication, ropes, and over all Technical Rescue Specialist. CROs are not necessarily expected to know every detail like a PJ should, they should just be aware enough to recognized safe and unsafe conditions. A CROs main focus is the up and out aspect.

Practice without resting with your butt in the air. Know that the rules can change at any time, so be prepared.

You are allowed to do any stroke you want. But it is highly recommended you use free style.