Dutch marine services company Fugro NV has warned that weakness in the oil and gas industry, combined with technical difficulties, meant its results for the first half would fall short of expectations, hammering its shares. Fugro, involved in the search for Malaysia Airlines' missing flight MH370, said it would make a one-off writedown of up to 350 million euros ($477.4 million) as a result of slowing growth in capital spending in the oil and gas industry, which accounts for three quarters of group revenue. It said it would report a "low single-digit" margin, on the basis of earnings before interest and tax (EBIT), for the first six months of the year, but strong growth in the second half would partly compensate for the setback. The full-year margin will still be down on last year. "For sure we are in a dip," said Chief Executive Paul van Riel in an analyst call. "But we really are looking at a much better second half ahead of us and also circumstances