Hanwha Ocean Co's shipyard in the southeastern city of Geoje is seen in this undated file photo. (Yonhap) The United States has asked major South Korean shipbuilders to provide information on their capacity to build naval vessels, including destroyers and fleet replenishment ships, industry sources said Wednesday.The US Department of Defense and the Navy recently sent requests for information to HD Hyundai Heavy Industries Co. and Hanwha Ocean Co., and the two companies submitted details on their destroyer design capabilities and shipbuilding capacity last month, according to the sources familiar with the matter.For a separate RFI on medium-sized naval tankers, the two shipbuilders and Samsung Heavy Industries Co. also submitted responses, they noted."We responded to the US RFIs by providing a comprehensive overview of the shipyards' capabilities, including their shipbuilding track record, design workforce and expertise, and annual shipbuilding capacity," an industry official said, asking for anonymity.Under the US Federal Acquisition Regulation, an RFI is a procedure used by the government to gather pricing, delivery terms and other market information for planning purposes.The latest move came after US President Donald Trump asked President Lee Jae Myung during last month's Group of Seven summit whether South Korean shipbuilders would be able to quickly build 10 US Navy vessels. Lee replied that South Korean shipbuilders were capable of doing so and would make their best efforts.The RFIs have raised expectations that Seoul and Washington will accelerate their shipbuilding partnership under the "Make American Shipbuilding Great Again" initiative, unveiled during the Lee-Trump summit in November last year.Under the agreement, South Korea committed $150 billion of its $350 billion US investment package to support shipbuilding projects in naval and commercial shipbuilding as well as related supply chains.Since then, South Korean shipbuilders have stepped up efforts to enter the tightly regulated US naval shipbuilding market, where foreign participation is limited under the Jones Act and other regulations.Hanwha Ocean has been seeking to secure the necessary licenses to build US Navy destroyers following its acquisition of the Philadelphia Shipyard in Pennsylvania.HD Hyundai has established a partnership with Huntington Ingalls Industries, while Samsung Heavy Industries has formed a partnership with General Dynamics NASSCO. (Yonhap)