This channel must be used to notify the Center whenever one's ship or other floating object enters or leaves Den Helder-region waters moors or unmoors, drops or raises anchor in this region , or passes the Moorman bridge. This organization has its own embankment-maintenance department, but also contracts out much of the maintenance and repair work to contracting firms. The Water Authority took over the sea embankment-maintenance tasks from the State Department of Public Works several years ago. In addition to performing military police duties, the Royal Netherlands Military Constabulary is also responsible for guarding the Netherlands' frontiers. People entering the country are checked on arrival at the above-mentioned ports and airports along the coast.
Inspection takes place both onshore and aboard vessels.
The passports and visas of persons entering the country are checked, and steps taken to ensure all other entry requirements are met. Furthermore, the Royal Netherlands Military Constabulary combats cross-border criminal activities such as illegal immigration, infringements of environmental law, and drugs and arms trafficking. It the execution of its role as border guards, the Royal Netherlands Military Constabulary keeps in close touch with shipping companies, shipowners, shipping agencies, and offshore companies. The State Harbour Police in Den Helder patrols the shipping waters in the Den Helder region. These waters include the inland waterways, the harbours, and specific parts of the North Sea and the Waddenzee.