Supporting Information for Safe Ship Handling based on the Concept of Potential Area of Water

Seta, Hiroaki; Inoue, Kinzo; Usui, Hideo

doi:10.9749/jin.111.63

Cited by 3 publications

(3 citation statements)

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“…Ship maneuver in a narrow and congested port is one of the most challenging operations, and especially, berthing/unberthing maneuver requires high operational skills (Seta et al, 2004;Hasegawa and Kitera, 1993). When ships are operated in ports, they are navigated at slower speeds than in the open sea.…”

Section: Introductionmentioning

confidence: 99%

“…When ships are operated in ports, they are navigated at slower speeds than in the open sea. Therefore, the rudder force is less effective, and the effects of wind and other external disturbances are more pronounced (Seta et al, 2004;Hasegawa and Kitera, 1993). Thus, berthing/unberthing are considered the most stressful phases of ship operation for inexperienced and highly experienced captains (Seta et al, 2004;Hasegawa and Kitera, 1993).…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, the rudder force is less effective, and the effects of wind and other external disturbances are more pronounced (Seta et al, 2004;Hasegawa and Kitera, 1993). Thus, berthing/unberthing are considered the most stressful phases of ship operation for inexperienced and highly experienced captains (Seta et al, 2004;Hasegawa and Kitera, 1993). Additionally, the burden will be even heavier if the captain is unfamiliar with the port.…”

Section: Introductionmentioning

confidence: 99%

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Ship trajectory planning method for reproducing human operation at ports

Suyama,

Miyauchi,

Maki

2023

Preprint

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Among ship maneuvers, berthing/unberthing maneuvers are one of the most challenging and stressful phases for captains. Concerning burden reduction on ship operators and preventing accidents, several researches have been conducted on trajectory planning to automate berthing/unberthing. However, few studies have aimed at assisting captains in berthing/unberthing. The trajectory to be presented to the captain should be a maneuver that reproduces human captain's control characteristics. The previously proposed methods cannot explicitly reflect the motion and navigation, which human captains pay particular attention to reduce the mental burden in the trajectory planning. Herein, mild constraints to the trajectory planning method are introduced. The constraints impose certain states (position, bow heading angle, ship speed, and yaw angular velocity), to be taken approximately at any given time. The introduction of this new constraint allows imposing careful trajectory planning (e.g., insitu turns at zero speed or a pause for safety before going astern), as if performed by a human during berthing/unberthing. The algorithm proposed herein was used to optimize the berthing/unberthing trajectories for a large car ferry. The results show that this method can generate the quantitatively equivalent trajectory recorded in the actual berthing/unberthing maneuver performed by a human captain.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%