Gee, is that how they do it in Florida? Dump it into the bilge, add some emulsifier, then pump it over the side?
I got burned in Washington waters for a little
oil film on the water surface from a dinky little
oil spill from my dingy. They now watch us like a hawk up there when fueling or changing
oil. I also had to dump my fuel sump drainings in a container when pre-flighting my float plane when I had it.
Those vacuum aided oil drain devices are great. I heat the oil up, stick the plastic tube in the dipstick tube, and pump it every once in a while till it drains the pan. That's the same way I changed oil in my boat engine.