Chennai/Visakhapatnam: As the arduous operation to trace the IAF’s missing AN-32 aircraft with 29 people on board stretched into the third day on Sunday, the search and rescue team sought satellite imagery to find any clue of the plane that lost contact over the Bay of Bengal. “There is no sign of the plane as yet,” a senior defence official said. At least 18 navy and coast guard ships, including a submarine and eight aircraft, are involved in the round-the-clock operation to search for the Port Blair-bound transport plane that went missing after it took off from the Tambaram air base near Chennai on July 22. PTI