passages where the water
is over 1,000 meters deep we chuck everything except plastic and non-bodegradables.
We sink bottles and cans - homes for crabs etc till they degrade.
Cardboard and paper go over but keep plastic coated papers etc.
We are lucky we have a big lazaretted in the stern that fits all the plastic etc. We keep film chocolate wrappers etc as they are plastic etc.
Near pristine islands we are not usually away for that long between trash disposal so its easy to keep and store on board.
Near pristine islands we do not throw fish
scraps in as this could attract sharks etc. Some places in the Pacific even the reef sharks are getting aggressive near boats and we love swimming off the back of ours