The ditching of the Cessna brings out several things to remember/check for overwater flying.
If two or more persons then have a buddy line to connect the people together.
That the lifejackets are aviation approved, not a marine type with no light or whistle.
That lifejackets have an annual check/service to make sure they will work when needed.
The same applies to life rafts. Remember the case of a Trans Pacific ferry that came down and the raft had not been
serviced in a long time and the maker had gone out of business some years before.
That a raft has an attachment line secured to the lifejacket people so that it does not drift away as in the ditching mentioned above.
A lifejacket is better if it has a hood to prevent water being splashed into ones face and waves trying to drown you while in the life jacket.
Have a crotch strap to ensure that the life jacket person stays in the jacket and does not slowly slip out of it with time.
In a light single it is a must to have the door or canopy cracked open in the ditching to prevent an issue of not being able to exit the aircraft after splash down due to the hatch/door being jammed or water pressure preventing it being opened. That aspect alone has taken more than one aviator to the bottom.
If going more than gliding distance to at least the shore line then have life jackets available and know how to use them and put them on under pressure. The lower you fly the less time there is to put a life jacket on.
R