A tidal gauge has been installed in the Wash to complete a national network designed to improve flood forecasting.
The instrument sits 4km off the shore of Lincolnshire on a 2m-wide platform some 11m above sea level.
It is the 44th and final gauge to be put in place as part of a scheme to record information about sea levels.
Meteorological equipment will measure wind speed and direction; air pressure and temperature; and water quality and salinity.
As well as collecting data for the Environment Agency, the instrument’s tide level data will be used by the harbour authority to help boats navigate through the Wash, and by the Ministry of Defence as a static marker of the end of its testing range.
Environment Agency flood and coastal risk management team leader Claire Rose said: “This new gauge has a practical benefit for local communities as the information it gathers on sea levels will help us predict tidal surges and therefore improve our flood warning service.
“It’s a nationally important project, too, as it fills in the last gap in the UK’s monitoring network to give us the best picture of tidal conditions across the country.”