What does the term "slop" refer to on a tanker?

The term "slop" specifically refers to the residues of cargo that remain in the tanks of a tanker and cannot be effectively pumped out. This can occur due to the design of the tank itself and the physical properties of the cargo, which may include viscous fluids or sediment that settle at the bottom. Proper management of slop is crucial in the shipping industry, as it has implications for both environmental compliance and operational efficiency.

For tankers, slop management often involves procedures for the treatment and disposal of these residues to prevent pollution and adhere to regulations, ensuring that the vessel operates within legal environmental standards. This understanding is vital for crew members who must analyze residuals to ensure the tanker's efficiency and environmental safety during operations. Other options, while related to vessel operation and maintenance, do not represent the specific definition of "slop."