Sewage and bilge water (would be classified as waste water) are two very different things. Bilgewater (aka waste water) can only go overboard once it goes through treatment to remove oil (oily water separator). And you can only do that at more than 20 miles from shore.
Sewage can be dumped after it is treated (Marine Sanitation Device) I believe after 3 miles. And then straight sewage can go overboard after 20 miles.
Within three miles (5 km) of shore, Annex IV requires that sewage discharges be treated by a certified MSD prior to discharge. Between three and 12 miles (19 km) from shore, sewage discharges must be treated by no less than maceration or chlorination; sewage discharges beyond 12 miles (19 km) from shore are unrestricted.
(12 nautical miles), contiguous zone (24nm), and exclusive economic zone (200nm, plus maritime boundaries with adjacent/opposite countries).
Rules change a bit at 65ft and 80ft length boats. And more relaxed for personal use smaller craft.
Thanks for the indepth info. Memorizing these rules is damn near impossible. That's why cards are hanging in the engine spaces for this reason.
When I lived on a sailboat a few years ago, my shit went straight overboard, in harbor. Nobody dindu nuffin about it. And I swam in the water every day. I ate fish I caught in that water. I din give a fuck.
One person dumping at a time doesn’t make much difference.
Big ship with a large crew saving it up and dumping all at once, not so good for the surrounding area.
Also it’s off topic from the video. Shit tank vs bilge. On a small boat your bilge is most likely water that leaked or splashed in, and some dirt/trash, and a little bit of grease/oil, no requirement for treatment. Big ships seem to have a lot more grease/oil leaks. My experience ends at the 65’ size.
U nasty
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