New Zealand rescuers say missing yacht presumed sunk WELLINGTON, New Zealand, June 29 (UPI) -- A vintage yacht carrying an American and British crew that went missing after leaving a New Zealand port is presumed sunk, officials said. New Zealand rescuers Friday carried out a third day of unsuccessful sea and shoreline aerial searches for any sign of the Nina, a wooden racing schooner built in 1928, or its crew of six Americans and one Briton, CNN reported. The Nina left the port in Opua, on New Zealand's North Island, for Australia May 29 and made it about 400 miles before hitting rough weather June 4, said the Rescue Co-ordination Center of New Zealand. The crew experienced 50 mph winds and 26-foot swells. The center said it was last in contact with the crew June 4. Family and friends failed to hear from the crew and alerted authorities June 14. Search leader Neville Blakemore said the boat presumably sank but survivors may still be found.