Bhubaneswar, Aug. 25 -- Despite continuous searches by the Indian Navy and Coast Guard, there is no trace of the 22 crew members missing from cargo vessel MV Ocean Winner, two days after it sank in the deep waters of the Bay of Bengal, officials said. The search operation, involving naval aircraft and Coast Guard vessels about 700 km east of Visakhapatnam, has so far found an oil slick near the vessel's last known position and two empty liferafts. Two Chinese crew members, Chen Jianhe and Pan Tonglai, were spotted floating on liferafts by a naval aircraft and rescued by crude oil tanker MT AISOPS. The Panama-flagged vessel, carrying more than 72,000 tonnes of iron ore fines from Paradip port in Odisha to China, sank about 230 nautical miles...