The navy is to buy two sets of US-made low-frequency active sonar (LFAS) systems to detect submarines operating in the Taiwan Strait, and plans to deploy them within two years, defense sources said yesterday.

• 来自国防部门消息，台湾海军准备购买两组美制低频主动声纳系统，以侦测台湾海峡之潜水艇，并计画两年内开始使用。