This is the Norwegian Hydrographic Service's Main or Approach chart series. This chart series covers the entire coast of the Norwegian mainland and of the islands nearby. The charts in non-polar regions have a scale of 1:50,000, with the exception of some charts for long fjords that have scales of 1:75,000, 1:80,000 or 1:100,000. In their paper form, charts in the Main Chart Series are designed primarily for navigation in inner coastal waters. Their WMS equivalent is not to be used for navigation purposes. The service is updated every month based on new and updated charts.