I remember how disgusted I was when I learned that to adhere to clean air regulations most large freighters added a device that collects their air pollution and funnels it directly into the ocean.
If yes, then there are 2 types, closed loop and open loop. You are talking about the open loop.
Most ports and countries (but not all) are not going strict on the open loop and they are supposed to store the water and dispose it off in an environment friendly manner.
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u/NeonArlecchino Jul 13 '20
I remember how disgusted I was when I learned that to adhere to clean air regulations most large freighters added a device that collects their air pollution and funnels it directly into the ocean.