The New Zealand authorities have formally called off the search for the sailing cruiser Nina, and say its seven-person crew, which includes Evi Nemeth who for the last 30 years has written the system administration handbooks for Unix and Linux, is now presumed lost at sea. Nemeth was sailing off the western coast of New Zealand in the missing 21-metre vintage wooden schooner with its owner David Dyche, 58; his wife, Rosemary, 60, and their son David, 17; Kyle Jackson, 27; Danielle Wright, 18, and Briton Matthew Wootton, 35. The boat was last heard from on June 4, when Nemeth...