If the ship is intact after grounding, there are two options for re-flotation: lightering weight or transfer weight within the ship tanks to free the ship. Weight Lightering is usually the common method to refloat the ship. The salvage team would have to discharge oil from the tanks around the grounding area until the ship is free. While weight transfer within the ship tanks is usually recommended if there are some empty tanks in the ship. This reduces the cost of freeing the ship but requires assuring that the new weight distribution will not affect the ship’s stability or strength.