The Marine Casualty Investigation Board says that because of the increasing number of accidents involving jet-skis, users should be trained and required to carry lifesaving equipment.
The board has been investigating the death of a young man in a jet-ski accident in Co Mayo.
Read the MCIB's draft report in full
Patrick O'Haire died on Lough Mask on 9 May 2007.
It was intended to be an evening of fun with a friend but it went tragically wrong when the engines on both their jet-skis failed and they lost contact with each other.
His companion got back ashore safely but Mr O'Haire's body was found the following day.
The board investigation report says that both men had little or no familiarisation training on jet-skis, both of the machines were in poor mechanical condition and both men had ventured out in poor weather and in poor light.
The report says that because of the increasing number of accidents involving jet-skis, users should be trained, required to carry lifesaving equipment and the jet-skis should be registered.
The annual lifeboat figures also published today show that the RNLI rescued 993 people last year and Dún Laoghaire was the busiest lifeboat station.
