A navigation system comprising a portable satellite navigation and positioning device.

摘要

There is described an integrated navigation system, comprising a portable navigation device (10) and an on-board unit (20) adapted to acquire data regarding the movement of a vehicle from a plurality of on-board sensors, in which the portable navigation device (10) and the on-board unit (20) comprise associated communication means (C', C") for transmitting data between them.;The portable navigation device (10) includes a detection module (D) for detecting the presence of an on-board unit (20) within a predetermined operational communication range, which module is adapted to automatically establish a communication link (L) with the abovementioned on-board unit (20) in the event of a detected presence, and is adapted to assume a first autonomous operational configuration, in which the navigation data are calculated on the basis of the current position of the device (10) determined via its own satellite positioning module (SP), and a second assisted operational configuration, in which the navigation data are calculated on the basis of vehicle movement data acquired at the on-board unit (20) by the on-board sensors.