Augmented reality system, comprising, - a global navigation satellite system module adapted to output position data, - an orientation measurement module adapted to output orientation data, - an augmented reality module, - at least one AR-client (104a, 104b) comprising a camera (1040a, 1040b) and a display (1041a, 1041b), wherein the augmented reality module is adapted to: - determine a position and orientation of the camera (1040a, 1040b) of the at least one AR-client (104a, 140b) based on the position data and orientation data, - calculate screen positions of at least one AR object (201a, 201b) based on the position and orientation of the camera (1040a, 1040b) of the at least one AR-client (104a, 104b) to create at least one AR-overlay, - transmit the at least one AR-overlay to at least one AR-client (104a, 104b), and the AR-client (104a, 104b) is adapted to: - merge the at least one AR-overlay with a picture received from the camera (1040a 1040b) of the at least one AR-client (104a, 104b) to provide an AR-image, and to - display the AR-image on the display (1041a, 1041b), wherein the augmented reality module further comprises a camera, characterized in that: the augmented reality module is further adapted to adjust, based on the position data and orientation data, a heading of the camera (1040a, 1040b) of the at least one AR-client (104a, 104b) by: - identifying earth fixed features captured by the camera of the augmented reality module, - tracking movement of the earth fixed features, - adjusting the heading of the camera (1040a, 1040b) of the at least one AR-client (104a, 104b) by compensating for the movement of the earth fixed features. - a global navigation satellite system module adapted to output position data, - an orientation measurement module adapted to output orientation data, - an augmented reality module, - at least one AR-client (104a, 104b) comprising a camera (1040a, 1040b) and a display (1041a, 1041b), the augmented reality module is adapted to: - determine a position and orientation of the camera (1040a, 1040b) of the at least one AR-client (104a, 140b) based on the position data and orientation data, - calculate screen positions of at least one AR object (201a, 201b) based on the position and orientation of the camera (1040a, 1040b) of the at least one AR-client (104a, 104b) to create at least one AR-overlay, - transmit the at least one AR-overlay to at least one AR-client (104a, 104b), and the AR-client (104a, 104b) is adapted to: - merge the at least one AR-overlay with a picture received from the camera (1040a 1040b) of the at least one AR-client (104a, 104b) to provide an AR-image, and to - display the AR-image on the display (1041a, 1041b), - determine a position and orientation of the camera (1040a, 1040b) of the at least one AR-client (104a, 140b) based on the position data and orientation data, - calculate screen positions of at least one AR object (201a, 201b) based on the position and orientation of the camera (1040a, 1040b) of the at least one AR-client (104a, 104b) to create at least one AR-overlay, - transmit the at least one AR-overlay to at least one AR-client (104a, 104b), and the AR-client (104a, 104b) is adapted to: - merge the at least one AR-overlay with a picture received from the camera (1040a 1040b) of the at least one AR-client (104a, 104b) to provide an AR-image, and to - display the AR-image on the display (1041a, 1041b), - merge the at least one AR-overlay with a picture received from the camera (1040a 1040b) of the at least one AR-client (104a, 104b) to provide an AR-image, and to - display the AR-image on the display (1041a, 1041b), wherein the augmented reality module further comprises a camera, characterized in that: the augmented reality module is further adapted to adjust, based on the position data and orientation data, a heading of the camera (1040a, 1040b) of the at least one AR-client (104a, 104b) by: - identifying earth fixed features captured by the camera of the augmented reality module, - tracking movement of the earth fixed features, - adjusting the heading of the camera (1040a, 1040b) of the at least one AR-client (104a, 104b) by compensating for the movement of the earth fixed features. - identifying earth fixed features captured by the camera of the augmented reality module, - tracking movement of the earth fixed features, - adjusting the heading of the camera (1040a, 1040b) of the at least one AR-client (104a, 104b) by compensating for the movement of the earth fixed features.