This paper summaries the development of an advanced visualization-based nautical information system that enables collision risk to be predicted and evaluated to multiple targets on electronic nautical chart systems. Cone-shaped collision danger regions to acquired targets are derived by a vector analysis between encountered ships. Visually inspection of the tip of own ships velocity vector in relation to the displayed cone-shaped danger areas is the key to interpretation: If the tip of the vector terminates inside, the user-defined safety margin with respect to minimum passing distance CPA (closest point of approach) limit is violated. The OOW (Officier of watch) can easily identify a feasible evasive manoeuvre to avoid the dangerous area and execute a manoeuvre according to the COLREGS (collision regulations) and surrounding environment. AIS (automatic identification system) and radar are proposed as primary and secondary source for target data, respectively. It is argued that the proposed nautical information display system provides a clear and simple presentation of essential anti-collision information that is easy understandable to the navigator. It is demonstrated that the display is most efficient in crossing situations, while less effective in head-on and overtaking situations in congested waterways. Further work should focus on the situation after the next waypoint along the planned route in order to enable the navigator to identify possible dangerous targets and imagine any evasive/escape manoeuvre well ahead of alternating the course.
Prediction and evaluation of collision risk to multiple targets on electronic nautical chart systems
Vorhersage und Einschätzung der Kollisionsgefahr mit mehreren Zielobjekten bei elektronischen Seekartensystemen
2006
5 Seiten, 7 Bilder, 5 Quellen
Conference paper
Storage medium
English
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