pbr A 56-year-old Croatian man has been rescued from his sinking boat, seconds before it was dragged under the waters of River Sava in Zagreb.br ppbr After many hours of trying to tow Ivan Plevnik and his boat to safety, emergency officials had to winch a rescuer down from a helicopter, when the boat began to sink.br ppbr Dramatic footage from Sunday showed the rescuer harnessing Plevnik and the two of them being airlifted to safety, just seconds before the vessel sank into the waters of the river.