All boats in Hawaii waters must have at least one Coast Guard Approved PFD for each person on board an underway vessel. PFDs must also be worn when the boat is anchored or moored in a non-designated off-shore mooring area.
Boat Length
PFDs must be worn on vessels of all lengths on Hawaii waters.
Compulsory PFD Requirements for Hawaii
All children 12 years and under must wear a USCG-approved life jacket while aboard any boat that is underway on Hawaiian waters. The PFD should also be worn while the boat is anchored or moored in a non-designated offshore mooring area.
Exceptions from wearing PFDs in Hawaii
It is not a required for the child to wear a PFD while in an enclosed cabin or when the child is below deck.
Disclaimer: The information presented here is meant to be a general reference for educational purposes. Please check with your state for the most up to date information and any current changes in the laws. Source: BoatUS