Setting up driver assistance functions for inland vessels based on high precision and integrity checked positioning information

Abstract

Within the project LAESSI (Leit- und AssistenzSysteme zur Erhöhung der Sicherheit auf Inlandwasserstraßen), efficient navigation assistance functionalities for the inland waterway transport will be developed. The application of these novel functionalities aims at a reduction in risk of colli-sions by supporting the skipper in its tasks. The essential basis for all assistance functions is the provision of reliable and comprehensive nautical information. This includes reliable position, altitude, heading and movement information from the own vessel. A main source of this information is GNSS processing. Due to the required accuracy phase based GNSS positioning like real-time kinematic (RTK) is required. Data relevant for the assistance systems are integrated on land and sent via AIS to the vessel. In future enhanced standards for AIS communication (AIS/VDES Standard) will be the basis for significant additional transmission capacity. A concept for integrity monitoring of the GNSS data is also focus of this project. New monitoring techniques which check the RTK corrections before transmitting will be implemented. Components of the ship based integrity concept are the monitoring and detection modules on the vessel, incorporating also complementary sensors, like inertial sensors to validate the signals.