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  • 2020 December 13 11:42

    NYK conducts second test of remote navigation of tugboat

    NYK and its group companies MTI Co. Ltd., Keihin Dock Co. Ltd., and Japan Marine Science Inc. (JMS) obtained useful results in the second test of the remote navigation of a tugboat as a part of the Japanese government’s Sea Trial Project on Remote Control Navigation* for the realization of autonomous ships by 2025.

    Outline of Second Test

    Within Tokyo Bay, a manned tugboat** equipped with a remotely controlled system*** was operated remotely from the operation center in the city of Nishinomiya in Hyogo prefecture approximately 400 kilometers away. In the previous test in January this year, the operator in the remote operation center used sensors and cameras equipped to the tugboat to recognize surrounding conditions, created a route plan and action plan (collision avoidance route plan) for the remote control. In this second test this time, the below two tests to respond to malfunctions of equipment or ship-shore communication were conducted.

    a) Test for verification of fallback operation

    As shown in Figure 1, tests to confirm response functions to equipment malfunctions or interruptions of ship-shore communication were conducted. In the tests, a signal sent remotely to the ship to (1) stop as quickly as possible, and (2) automatically navigate at a reduced speed until the next waypoint, to ensure ship safety functions or maintaining limited usage of the ship in the situation of troubles of equipment or ship-shore communication.

    b) Test for optimization of data communication amount

    The purpose of this test was to confirm the optimization function of data communication amount depending on the available communication bandwidth for remote control. To ensure stable remote maneuvering, the amount of communication needs to be automatically adjusted. For that reason, the transferring data amount of radar echo should be controlled according to available communication bandwidth so that it does not affect other data transmissions. For remote control, it is necessary to monitor the position of the ship and nearby obstacles in real time, and communication interruption due to communication overload has to be avoided so that confirmation of this communication optimization function is indispensable.

    Future Development
    NYK and its group companies will continue to improve the system using the accumulated knowledge from the two remote navigation tests and will keep to collaborate with partners to realize remote control of large vessels. In addition, we will disseminate and develop the developed technologies for autonomous ships with crews and crewless autonomous ships that we are working on.




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