Implications of the use of GNSS and WGS84 for marine navigation

For the last two years a large collaborative project has been taking place at the University of Nottingham to investigate novel strategies for the imp lementation of GNSS within all phases of marine navigation in UK waters. Th e project, which was recently completed, was funded by the Engineering and Physical Sciences Research Council. The project also received financial sup port from a prestigious team of collaborators that included the UK Ministry of Defence Hydrographic Office, Trinity House Lighthouse Service, Northern Lighthouse Board, Commissioners for Irish Lights and the Port of London Au thority. The first phase of this project was reported in the Journal in May 1999 (Ashkenazi et al., 1999); this paper presents an update of the progre ss of the project over the last year.