Patent ID: 8643509
Filing Date: 2014-02-04
Classification: B63B

Abstract:
1. A method for providing an alert when the motion of a ship indicates a potential of sloshing damage from liquid cargo being transported by the ship, said method comprising: calculating, with a processing device, a natural period for the liquid cargo held in a tank based on received user inputs relating to a configuration of the tank and a fill percentage of the tank; receiving, at the processing device, data describing actual motion of the ship with respect to three orthogonal axes; calculating, with the processing device, a plurality of periods in a time sequence defined by the actual motion of the ship; determining, with the processing device, a proximity of the natural period of the liquid cargo held in the tank to the plurality of periods in the time sequence defined by the actual motion of the ship; and providing an alert to a user if 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.