SEOUL - Daewoo Shipbuilding & Marine Engineering Co Ltd reported on Wednesday a provisional second-quarter operating loss of 3.03 trillion won ($2.62 billion), citing construction delays on offshore projects such as oil and gas rigs. The result had been expected as the high-end offshore plant business has been loss-making for the world’s three biggest shipyards, all in South Korea. Earlier on Wednesday, competitor Samsung Heavy Industries Co Ltd reported a 1.55 trillion won operating loss in the April-June quarter, while Hyundai Heavy Industries Co Ltd reported a 171 billion won operating loss during the same quarter.