ULSAN, South Korea (Reuters) -South Korea's HD Hyundai Heavy Industries is in talks with multiple companies about buying a U.S. shipyard, a senior company executive said, seeking to tap into President Donald Trump's push to revive America's ailing shipbuilding industry. The world's largest shipbuilder based on orders is targeting 3 trillion won ($2.2 billion) in annual revenue by 2035 from building warships for the U.S. Navy, said Woo-maan Jeong, head of planning and management for HD Hyundai's naval and special ship unit, in an interview at its Ulsan headquarters. "The U.S. is apparently facing a situation that pushes it to inevitably open the shipbuilding market," said Jeong, given the widening gap in naval capabilities between the United States and China and the lack of sufficient U.S. capacity for building warships.