"This is case of pure stupidity, including putting a baby at risk," said Manch.
"Should an accident occur, the chances of the person holding onto the baby if the vessel capsized is remote, and once in the water with neither person wearing a lifejacket survival would be remote.
"It is concerning that we have people in charge of vessels who clearly do not think of the consequences of their actions."
Manch said it was important to not take risks on the water these holidays.
He said in this instance the skipper's actions showed a disturbing "she'll be right" attitude that all too often ended in tragedy.
Further enquiries were continuing and enforcement action was now being considered against the skipper.