Which of the following conditions apply to a ship other than an oil tanker discharging oily mixtures 12 miles offshore?

The condition that applies to a ship discharging oily mixtures 12 miles offshore, particularly one that is not an oil tanker, is when the oil content of the effluent is less than 15 parts per million (ppm). This is significant because international regulations, specifically MARPOL Annex I, set a limit on the allowable oil content in effluents discharged from ships. To ensure environmental protection, any discharge must adhere to this 15 ppm limit, especially for ships not classified as oil tankers.

Discharging oil mixtures that meet this standard allows the ship to comply with regulatory requirements while minimizing pollution. It's essential for the crew and operators of these vessels to maintain and effectively monitor oil content to ensure that they do not exceed the permissible levels, thus maintaining compliance and protecting marine ecosystems.

Alternate conditions, such as conducting maintenance operations or discharging oil originating from cargo pump room bilges, do not automatically exempt a ship from regulatory compliance; instead, they outline scenarios that could lead to non-compliance if proper precautions are not taken. Being within a special area typically imposes stricter controls and could restrict discharges altogether, meaning it would not generally permit the discharge of oily mixtures. Therefore, the critical aspect for compliance in this situation centers around ensuring the oil