Yes - one part of my thinking was how Parsees leave their bodies to be eaten by vultures, but hadn't known they were called sky burials. I was thinking more about how simple yet dignified burial at sea can be. Here is what the Book of Common Prayer offers
At the Burial of the Dead at Sea.
¶ The same office may be used; but instead of the Sentence of Committal, the Minister shall say,
UNTO Almighty God we commend the soul of our brother departed, and we commit his body to the deep; in sure and certain hope of the Resurrection unto eternal life, through our Lord Jesus Christ; at whose coming in glorious majesty to judge the world, the sea shall give up her dead; and the corruptible bodies of those who sleep in him shall be changed, and made like unto his glorious body; according to the mighty working whereby he is able to subdue all things unto himself.
I do actually take seriously the importance of having somewhere to remember the dead, but for me the sea - any bit of it really - would do as well as an overcrowded cemetry, or some private unmarked woodland grave.