Physical protection measures, such as burial in shallow waters and electronic monitoring of anomalies, along with legal regulations, all contribute to cable security. By treating undersea cables as critical infrastructure, Southeast Asian stakeholders can better manage geopolitical, environmental, and more conventional risks threatening cable resilience. The Asia Program in Washington studies disruptive security, governance, and technological risks that threaten. As the Indo-Pacific region further expands its global economic power, subsea fiber-optic cables will play an essential role in regional growth and stability, while also acting as a frontline in broader strategic competition. It was compiled for the Maritime Awareness Project.