Methods and systems for providing sloshing alerts and advisories

A sloshing alert and advisory system for a ship operable to transport a liquid cargo, said system comprising:

• a processing device;
• a user interface communicatively coupled to said processing device;
• memory communicatively coupled to said processing device, said memory comprising data defining a natural period of the liquid cargo held in a tank within the ship;
• and
• a ship motion sensor communicatively coupled to said processing device and operable to provide data describing a plurality of periods in a time sequence defined by the actual motion of the ship with respect to three orthogonal axes, said processing device programmed to determine a proximity of the natural period of the liquid cargo held in the tank within the ship to the plurality of periods in the time sequence defined by the actual motion of the ship, and to provide an alert via said user interface when at least a predetermined plurality of the plurality of periods in the time sequence are each within a threshold proximity of the natural period of the liquid cargo held in the tank within the ship indicative that actual ship motions are approaching conditions that potentially lead to excessive sloshing of the liquid cargo.

A non-transitory computer-readable medium for providing an alert when the motion of a ship indicates a potential of sloshing damage from liquid cargo being transported by the ship, wherein the non-transitory computer-readable medium includes computer-executable instructions embodied thereon, wherein when executed by at least one processor, the computer-executable instructions cause the at least one processor to:

• determine, based on data related to the configuration of each of a plurality of tanks containing the liquid cargo and a fill percentage for each of the plurality of tanks, as input by at least one of a user and a sensor, a natural period of the liquid cargo within each of the plurality of tanks;
• determine, a plurality of periods in a time sequence defined by the actual motion of the ship with respect to three orthogonal axes based on data received from a ship motion sensor;
• determine a proximity of the natural period of the liquid cargo within each of the plurality of tanks to the plurality of periods in the time sequence defined by the actual motion of the ship;
• and
• provide an alert via a user interface communicatively coupled to the at least one processor when at least a predetermined plurality of the plurality of periods in the time sequence are each within a threshold proximity of the natural period of the liquid cargo within each of the plurality of tanks such that actual ship motions are approaching conditions that can lead to excessive sloshing of the liquid cargo.