Satellite based Maritime Safety
The project SaMariS is a joint research project arisen from project ideas selected as awardees of innovation competition 2011 in Mecklenburg-Vorpommern for funding . The improvement of safety in the context of ship’s navigation is the overarching objective of all 3 subprojects:
Research Port Rostock (Source: HERO)
Though the project is composed by 3 subprojects the planned developments are strongly networked. Position, navigation, and time data (PNT) represents an essential data source for the development of efficient maneuver strategies as well as improved models of ship’s dynamic. Improved models of ship’s dynamic behavior as well as accurate PNT data are basics to increase the capability of tools developing, realizing and monitoring maneuver strategies. Therefore at project end a common validation of the developed subsystems is planned. For this purpose required interfaces, which ensure data exchange processes between the subsystems, are specified during definition phase of the project.
DLR’s subproject AIS/PNT data integrity
Safety by resilient nautical data
Investigations of the Liverpool John Moores University realized in 2007 have shown that a disappointing high number of static and dynamic ship data distributed by the Automatic Identification System (AIS) is incomplete or erroneous. This resulted into the recommendation that AIS shall not be used as primary mean for traffic situation surveying and assessment. Unacceptable inaccuracies at apparently plausible position, navigation and time (PNT) data are an indeterminable error part of AIS data up to now. Therefore a work package deals with the development of methods for the monitoring of plausibility and consistency of AIS data in real time. For this purpose the maritime Ground Based Augmentation System (MGBAS) in the Research Port Rostock will be upgraded with an AIS monitoring system (receiver, additional data processing modules) to enable the experimental evaluation of the developed algorithm under real time conditions.
At present it is impossible to derive from AIS data conclusions about accuracy and reliability of ship dynamic data. One reason lies in the fact, that AIS information regarding the currently used ship-side PNT system is insufficient to get information either about the current applied GNSS (Globabal Navigation Satellite System) signals (system, frequency bands) or used techniques. Neither the indication of accuracy for PNT data such as Speed over Ground (SOG) in the AIS message formats is foreseen. Therefore the conceptual advancement of AIS message formats is a planned project activity in the context of global AIS evolution process.
The provision of PNT relevant Maritime Safety Information (MSI) is an approach currently under discussion. It would enable that maritime users can be informed about the current integrity of available services and applicable techniques. To permit the provision of these information the MGBAS will be enriched with additional monitors evaluating the usability and capability of services and techniques. An upgrade of GNSS receiving equipment of MGBAS is foreseen to ensure that all available GNSS signals can be assessed.
At project end the feasibility will be demonstrated that integrity indicators can be determined for AIS/PNT data provided by ships operating in the overseas port Rostock. This information is a prerequisite for the decision regarding the current usability of AIS/PNT data for manoeuvre planning and realisation.
Ministerium für Bildung, Wissenschaft und Kultur Mecklenburg-Vorpommern