Shipping Forecast
There is a strict set of rules (a protocol) on how the forecast is written, and it has a limit of 370 words. It is always said in the same way and is around 9 minutes long. The language of the forecast is hard to understand unless the listener understands how the rules work. For example:  People listening to the forecast who know the protocol can understand it as "In the English Channel, there are strong winds, followed by a stronger wind in less than twelve hours time with some light rain, but good visibility". The numbers refer to the Beaufort Scale of wind strength. Imminent means within 6 hours, soon between 6 and 12, and later meaning after 12 hours. There are lots of other jargon used in the Shipping Forecast.