The Marifoon forecast covers the coastal waters around the Netherlands up to 30 nautical mile offshore and the greater inland waters. This area is divided into the following districts: Vlissingen, Zierikzee, Hoek van Holland, IJmuiden, Texel, Harlingen, Rottum, Delfzijl, IJsselmeer and Markermeer. The Marifoon is issued four times a day and covers a period of 24 hours beginning at 00:00, 06:00, 12:00 and 18:00 UTC. The forecast contains wind warnings in force (≥6 Bft) and a forecast of: general synopsis, average wind direction and force, wind gusts (if ≥ 10 knots above average wind), weather and visibility for the districts mentioned above. For the time indication, "first" or "soon" are used for a change in the weather in the first 4 hours of the time block, "later" is used to indicate a change in the last 4 hours. The data is published in two different formats: txt and xml.