Visual Signalling

Our work covers investigations and analysis into how marine aids-to-navigation are observed and used visually. This includes aspects of understanding how the human eye perceives light, designing and testing lantern technologies and looking to see how machines could use visual cues into the future.

Resilient PNT

We conduct research and development on maritime Radionavigation systems, identifying vulnerabilities and limitations, developing and supporting mitigating systems where possible. Such research includes technical reviews and studies into the implications of failure or false information, through to the development of alternative positioning systems and the overall concept of operations.


Recognising the move towards the provision of digital services, we conduct research and development into the opportunities, architecture, standardisation and implementation of how mariners can receive AtoN information via digital services. Our research in this area includes aspects such as the overall communications requirements, possible data bearers, cyber and physical security as well as the development and trial of potential GLA data services.


Maritime aids-to-navigation support safe shipping and protection of the environment around the world. The work conducted by GRAD forms part of a rich tapestry of research and development that takes place across the globe. GRAD supports the development of GLA strategic direction and documents, while supporting the overall use and standardisation of GRAD devised and supported systems.

AtoN Support Systems

GRAD provides expertise to the three GLA on day-to-day technical and system support matters, helping to ensure GLA AtoNs provide the level of service expected by the mariner and meet their IALA availability targets.