He was unaware of the details of the death, but noted the coast has had tragedies in the past around the big resurgence of diving and other water activity about the Hawke's Bay Anniversary and Labour Day holiday weekend.
"It's not a tool to hinder – it is a tool about how to be safe," says Hewitt, a trained Navy diver who survived 72 hours adrift off the Kapiti Coast in 2006, and who is also the brother of former All Black and Magpies rugby star Norm Hewitt.
The two grew up in the Wanstead area, between Waipukurau and the coast, and went to Te Aute College.
The tragedies might not expose particular failings, but he says steps should be taken as people come out from being "locked away for the winter", such as checking gear, health and fitness, and the local knowledge of where the diving and other water activity is taking place.
Last October, a 13-year-old boy was rescued from the surf at Te Paerahi, Porangahau, where he had become out of his depth. Another teenager died while diving at Pourerere on Christmas Day the previous year, and after two men died at Pourerere in June 2016 it was reported there had been five fatalities in the immediate area in 10 years, and others on the coast.
DoC is notifying the rahui via social media and with signs in the area.