The U.S. Navy said the guided missile destroyer USS Mustin had conducted “a routine Taiwan Strait transit (on) Dec. 19 in accordance with international law”.
China’s military, in a statement released by its Eastern Theatre Command, said its air and naval forces “tailed and monitored” the vessel throughout.
The digital sonar system and an integrated combat system are two key components Taiwan needs to build its own modern submarines. Chang did not elaborate on the status of the combat system.
The United States is Taiwan's main foreign source of weapons. Most countries shy away from arming the island, wary of angering Beijing and loosing valuable commercial contracts with the world's second-largest economy.
Last month, Taiwan's statistics agency raised its full-year export growth forecast to 3.84% compared with 2019, from a previous forecast of a 0.1% decline.
Taiwan, which China claims as its own territory, has been for years working to revamp its submarine force, some of which date back to World War Two, and is no match for China’s fleet, which includes vessels capable of launching nuclear weapons.