The total loss of engine power during cruise flight due to the disintegration of engine bearings and the fracture of a connecting rod, which resulted in a ditching into ice covered ocean water. Factors contributing to the survivability of the accident were the pilot's improper decision to fly over frigid water without sufficient altitude to reach a suitable landing area, the lack of written policy and procedures by the operator requiring sufficient altitude to reach shore when crossing ocean waters, temperature extremes consisting of sub-zero air and below freezing water temperatures, and the lack of personal flotation/survival equipment.