Abstract
Ship grounding is a hazard which requires enormous caution when occurs. No matter how secure a grounded ship may appear, she is in a dangerous position. In most cases, rapid refloating is desirable to remove the ship from a place of danger, to reduce stress on the hull and to decrease the risk of pollution. The usual action taken is reducing the weight of the ship, which requires the help of salvage team and consequently causes high cost. Another alternative is weight transfer from tank to tank until ship refloats; this has to be done with extensive not to cause double loss.