Legacy critical infrastructures

Definition
Legacy critical infrastructures are differentiated by: 

* human management of inter-infrastructure interfaces
 * human supervision and control during operation
 * downward trends in utilization

Overview
Examples of legacy critical infrastructures include power plants and distribution facilities managed primarily with forecasts, hospitals with paper records and expertise limited to on-site staff, best estimate logistics for shipping, paper-based financial markets, and air traffic control based on radio contact and manual coordination with radar.

Source

 * Working Towards Rules for Governing Cyber Conflict Rendering the Geneva and Hague Conventions in Cyberspace Issue, at 17.