Mr Filipaina, who is also a Counties-Manukau police Pacific liaison officer, was called to Mangere Bridge in May last year when So'saia Paasi and his 7-year-old son, Tio, drowned when a dinghy capsized. Three other children were rescued from the cold current.
Watersafe Auckland chief executive Sandra Harrop and Auckland Westpac Rescue Helicopter paramedic Karl Taylor, who helped during the Mangere Bridge tragedy, support measures to make the wearing of lifejackets compulsory.
"If everyone was wearing lifejackets that day [at Mangere Bridge], they potentially could still be alive," Mr Taylor said.
Ms Harrop said the "changing face of Auckland was reflected in drowning statistics", showing 19 boating-related drownings in the five years from 2008 to 2012.
But the proposed bylaw is strongly opposed by boaties, including the Auckland Yachting and Boating Association, which represents 17,000 members in the region's yacht clubs.
Association spokesman Richard Brown said it was unreasonable to cover all types of small boats, at all times and in all sea conditions and urged the council not to introduce a "rushed, albeit well-meaning, bylaw which will have little effect".
There are 100,000 boaties in the Auckland region.
Hibiscus Bays Boating Club spokesman Mike Cahill said despite a number of highlighted drownings in Auckland, the city had one of the lowest per capita rates of boating-related drownings.
The bylaw, he said, would not reduce the number of drownings, just increase the number of boaties breaking the law while actually boating safely and responsibly.
The club's submission said a more effective and efficient way of reaching the target group of new immigrants about safety issues would be through a boat ramp campaign.
Boats could be checked for safety equipment, overloading, compliance and navigation bylaw knowledge.
The club has criticised the compulsory wearing of lifejackets in boats of 6m or less, saying the council's case is not backed up with proof.
Of the five drownings in 2012, four were in boats under 4.9m made of lightweight aluminum, the club's submission said, adding it would accept the rule applying to boats under 4.8m.
Other councils around the country have already introduced stricter bylaws, including Auckland's two neighbouring councils, the Northland and Waikato Regional Councils.
In Northland and Waikato, lifejackets must be worn on non-motorised vehicles under 6m when under way, although in Northland the skipper can give permission for them not to be worn.
The Auckland bylaw would be overseen by the harbourmaster, who patrols the region's harbours and coast.