What is the maximum allowed limit of oil in overboard discharge when the ship is within 50 miles of land?

The regulation concerning oil discharge from ships is governed by international maritime laws, specifically the MARPOL Convention, which aims to prevent pollution of the marine environment by ships. When a ship is within 50 miles of the nearest land, the maximum limit of oil that can be discharged into the sea is set at 15 parts per million (PPM).

This limit is established to safeguard marine ecosystems and coastal communities from the harmful effects of oil pollution. Discharging oil at a concentration higher than 15 PPM can lead to significant harm to marine life and the environment, as even small amounts of oil can have detrimental effects. Therefore, ships must utilize oil-water separators to ensure that any oil content in the discharge water remains below this threshold when within the designated distance from land. Adhering to this limit helps maintain marine biodiversity and protect coastal resources.