FOAM produces real-time analyses and forecasts of the temperature, salinity and currents of the deep ocean for up to five days ahead. FOAM is built around a physically based ocean model driven by surface fluxes from the Met Office weather forecast system and assimilates measurements of ocean temperature that are available in near real-time. A global version of FOAM with one-degree horizontal resolution and 20 levels in the vertical has been run every day in the operational suite at the Met Office since October 1997.