My gosh P, I just now came across this thread. I’m so sorry to hear that and you have my condolences.
About returning your father’s remains to the sea, here’s something you might consider as well:
The amount of lead naturally in the ocean environment is a mystery to me; is the gunk from scuba weights so insignificant compared to natural sources that we're worried about nothing?
Scubak wrote:Thanks Calvin and Bob!!!