Controlling smuggling entails monitoring traffic between third countries (the EUs external frontier) and the Danish customs area. That also includes drugs controls at the internal frontiers and the control of goods to and from the Danish customs area when an embargo has been imposed for safety, health, veterinary, plant pathological or foreign exchange reasons. These tasks are often performed in close cooperation with other authorities, e.g. the police, veterinary authorities and health authorities. The Customs task comprises the control of approximately 7,000 km of coastline, approximately 400 harbours, several airports with international traffic, and the frontier between Denmark and Germany. Lastly, it includes serving travellers declaring goods. Many of these tasks require a resource-demanding 24-hour service. Controlling smuggling differs in many ways from the majority of other control tasks, which are essentially based on registration matters, declarations, and corporate accounts.