Shipping Forecast excluding the header line, has a limit of 350 words—except for the 0048 broadcast, where it is increased to 380 to accommodate Trafalgar's inclusion—and has a very strict format. It begins with "And now the Shipping Forecast, issued by the Met Office on behalf of the Maritime and Coastguard Agency at xxxx today." This format is followed quite strictly, although some continuity announcers read out the actual date of issue as opposed to the word "today". This is followed by gale warnings (winds of force 8 or more on the Beaufort scale), if any (e.g., "There are warnings of gales
World Area Forecast Center legacy reasons), and GRIB and BUFR charts - these are Wind and Temperature charts and SIGWX charts (Significant Weather Chart) for SWH (high levels) and SWM (medium levels). There are only two World Area Forecast Centres, each providing a backup for the other. These are the UK Met Office and Washington NOAA, working in duplicate so it would be possible to replace each other in a case of failure. Each of these two services operates its own satellite-based broadcast system to distribute data to airports all over the world. The UK Met Office is called SADIS (SAtellite DIstribution System) and