Taiwan on Thursday demonstrated its sea defences against a potential Chinese attack as tensions rise with Beijing, part of a multitiered strategy to deter an invasion from the mainland. The island's navy highlighted its Kuang Hua VI fast attack missile boats and Tuo Chiang-class corvettes in waters near Taiwan's largest port of Kaohsiung, a major hub for international trade considered key to resupplying Chinese forces should they establish a beachhead on the island. The Kuang Hua VI boats, with a crew of 19, carry indigenously developed Hsiung Feng II anti-ship missiles and displayed their ability to take to the sea in an emergency to intercept enemy ships about to cross the 44-kilometer (24-nautical mile) limit of Taiwan's contiguous zone, within which governments are permitted to take defensive action. China routinely sends ships and planes to challenge Taiwan's willingness and ability to counter intruders, prompting Taiwan to scramble jets, activate missile systems and dispatch .