ALT Digital twinning A digital twin is a dynamic virtual copy of a physical asset, process, system or environment that looks like and behaves in real time identically to its real-world partner. Actions and events can be modelled with unprecedented accuracy, offering the ability to experiment in a non-live environment of the real world. The five projects are led by scientists at Plymouth Marine Laboratory, National Oceanography Centre, University of Cambridge, University of Hull and University of Plymouth. They will develop digital twins in: Coastal ocean ecosystems for assimilation to marine system models. Ocean glider observations for ocean models which underpin weather forecasts. The operational flights of a research aircraft. Water-related hazard forecasting in Hull and East Riding of Yorkshire. A wave overtopping to produce a warning tool for wave hazards. The projects will last a maximum duration of 15 months.