How can list be controlled while discharging a tanker?

Controlling list during the discharge of a tanker is crucial for ensuring stability and safety. Using wing tanks near the longitudinal center of the vessel is an effective method for managing list because it allows for the distribution of weight in a more balanced manner as cargo is discharged. When liquid is pumped out from one side of the tanker, it can create an imbalance or list. By adjusting the discharge from the wing tanks located close to the centerline, crew members can counteract this tendency and maintain a more upright position of the vessel.

Discharging from these tanks can either help correct an existing list or prevent it from occurring by balancing the ship’s weight. This method is particularly advantageous because the wing tanks can be filled or emptied strategically as the cargo is removed, providing the necessary adjustments to stay within safe stability parameters.

Other options, such as using the after peak tank or a center tank near the bow, may have certain merits but do not provide the same level of control over list as the wing tanks. Shoreside personnel may assist in monitoring and advising on overall stability but do not actively control the vessel's balance during discharge. Therefore, strategically managing the discharge from wing tanks is the best practice for controlling list effectively.