The African network for measurements and monitoring of sea level was expanded and upgraded by installing new tide gauges in Cameroon, Congo, Djibouti, Egypt, Ghana, and Mauritania. The installation of Global Navigations Satellite Systems – GNSS receivers at the sea level stations in Takoradi (Ghana), and Inhambane and Pemba (Mozambique) provides the connection between the horizontal and the vertical datum at these locations.

The tidal and GNSS observations together allows one to monitor crustal motions at the tide gauge locations in order to derive absolute or climate related signals in mean sea level from the tide records. Experts from the African countries used the training provided to analyse data from the sea level stations around Africa and prepare tidal predictions.

Information on the network (equipment types and location, reports, trainings etc) is available on the African Sea Level Network website (, while the data from the stations can be accessed near-real time at Thanks to the combined efforts of GLOSS, IOC/tsunami and ODINAFRICA, Africa now has a network of 40 sea level stations.