Japanese ship operator Mitsui O.S.K. Lines (MOL) has reported that together with its two group companies and consortium partners have successfully concluded the world’s first sea trial of unmanned container ship operation from port to port (departure port: Tsuruga Port in Fukui Prefecture, arrival port: Sakai Port in Tottori Prefecture) on 24th and 25th January, as part of the unmanned ship project MEGURI2040 led by The Nippon Foundation.
The consortium conducted the sea trial with two different types of ships: a coastal containership and a coastal car ferry, aimed at using the results to develop versatile technologies by identifying similarities and differences between the two ship types.
It also conducted mooring tests using a drone in a move toward automated mooring operation.
Since MEGURI2040’s inception in 2020, the consortium has conducted various elemental experiments to realise autonomous ship operation. In October 2021, MOL Marine & Engineering conducted a safety verification test using its own 3D simulator before this sea trial.
For autonomous navigation, the ships followed a previously formulated route using the MES-S-developed autonomous ship operation control system, in consideration of the following elements.
- Accurately grasp ship location information
- Various external elements such as wind and tides/currents
- Ship handling performance specific to each ship (manoeuvrability, conditions of acceleration and deceleration)/configuration of ship handing equipment
- Navigation rules applied to ships
Information on other ships and obstacles/debris on the set route was gathered by the Furuno Electric-developed autonomous surrounding information integration system (measures and displays positions, speed, types of nearby ships, and position of obstacles/debris by integrating information gained by cognition through radar, AIS, and camera images). Based on the integrated information, the ship navigated the safe route formulated by the autonomous collision avoidance routing system.
Autonomous berthing and unberthing requires especially delicate handling, so the ship berthed and unberthed using information from the Furuno Electric-developed berthing/unberthing support sensor (equipment that calculates and visually displays accurate relative distances and relative angles between the pier and hull from information gathered by LiDAR/camera/satellite compass).
“Automated mooring” is an element of the consortium’s project. Normally, a crewmember on the ship passes the heaving line (to moor the ship in port) by throwing it to a worker on the pier. In this sea trial, the A.L.I.-developed automatic flight drone carried the line to the pier. As technology advances in the future, this is expected to become an alternative approach to mooring operations, which is a heavy burden on seafarers.
In order to develop highly versatile technologies, the consortium plans a sea trial of autonomous navigation using the coastal car ferry Sunflower Shiretoko which has different characteristics from the coastal containership.