Table 3.

Details of the technical defence subsystem of the SRMS.

Composition	A collection of technology-based risk mitigation methods, application software, and integrated systems.
objective	From the perspective of technical risk mitigation, giving full play to the effectiveness of technical activities, using information technology to discover, analyse, and deal with potential risks, then improving the effectiveness of water traffic risk mitigation.
function	Based on the inherent characteristics of technology, playing the role of identification, early warning, analysis, and monitoring in technical prevention.
characteristic	Advantage: strong methodology (with technical support), strong adaptability (fast perception speed), strong interactivity (link people and things), high integration (diversified constituent elements), good relevance and responsiveness (completely from actual demand).
	Disadvantage: high external dependence (cannot run alone), high technical threshold (not easy to achieve), faster stacking speed (as demand changes).