A medical navigation system for electromagnetic position and/or location determination of a sensor coil, which is located in a navigation space, includes a number of navigation modules, each having at least one field coil and a position coil. In each module, the sensor coil and the position coil have a fixed and known spatial relationship with each other. Each navigation module spans a navigation volume, with the respective navigation volumes in combination forming the navigation space. The individual navigation modules are arranged such that the position coil of a first of the navigation modules is located within the navigation volume of at least one other of the navigation modules. The first of the navigation modules and the other of the navigation modules are connected by a communication link.
