The Sensors used for this weather station were provided by Ohmex Limited and include a separate weather station and Tidalite tide gauge, both located at Dock Head, Eastern Docks Southampton.

Data from both instruments is received at the VTS building by direct serial data link. The logging software is PC based and also provided by Ohmex, to a specification designed by the Hydrographic section of ABP Southampton.

Emworx Limited on Hayling Island, have given advice on system design, built the web site and supplied hosting facilities.

Chimet Support Group is responsible for the design and development of the overall system, its project management, and the development of the software used for data control and presentation.

The web site is updated every 5 minutes from the data collection site at Dock Head. Every 5 minutes the sensors data is transferred from the Hydrographer of ABP Southampton to the CSG control computer at the RNLI Station, Hayling Island. The latest sensor data is then processed to create all the reports, graphics and archives. These outputs are then transferred to the website.

The link to tidal predictions (in the Latest Report page) is from the United Kingdom Hydrographic Office. Position coordinates (latitude and longitude) are referred to WGS84 chart datum.

Tidal heights are reduced to Chart Datum, which is approximately the level of Least Astronomical Tide.

The following table shows briefly how the reported data is derived.