"We were very lucky there were a couple of doctors who are staying at the beach who responded immediately.
"So, together with a nurse who had just been jogging around the beach and saw the incident unfold, there was enough medical help there."
Mr Rose said the man was given painkillers and after about 20 minutes he was put on to the stretcher and lifted on to the back of the chopper.
"Without being too harsh, it's very windy here, there's a very strong northerly that's chopping the waves up, so it's not ideal conditions.
"These guys made the decision to go boating, a decision that could have been far worse if the injured man had fallen into the sea.
"It's about everyone being aware of the conditions, being aware of the sea, and just applying the risk assessment to that.
"I think these guys possibly didn't do that as well as what they could have in hindsight. They probably thought it was a good idea at the time but they hit a wave in the wrong place."
Mr Rose said the beach was quite safe and that lifeguards are out on the water's edge, "ensuring that if people do get into trouble, that we'd be able to get them out of it".