Evaluation of ship collision risk assessments using environmental stress and collision risk models

Yoo, Yun-Ja; Lee, Jin-Suk

doi:10.1016/j.oceaneng.2019.106527

Cited by 26 publications

(16 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In Figure 3b, the near-collision situation occurred sequentially along with scenario-1 (Figure 4a situation), scenario-6 (Figure 5a situation), and scenario-4 (Figure 6a situation). Figure 3b represents the CoRI results for each scenario as well as a detailed analysis of risk-recognizable scenarios no.1, no.4, and no.6, which have a CoRI value of more than 50% [30,50]. Figure 4 shows the results of the ship tracks and the CoRI results of scenario no.1 (shipi: ship-1, ship-j: ship-2), and ship-j overtakes from the starboard side of the ship.…”

Section: Collision Risk Analysis Resultsmentioning

confidence: 99%

“…This ship domain-based risk assessment determines whether the domains of one's own ship and other ships invade each other at the current location; however, the method is limited because the risk of a collision at the closest point of approach (CPA) location could not be evaluated in advance if the current voyage continued. Therefore, Yoo and Lee, 2019 [30] proposed a collision risk index (CoRI) model based on the concept of the ship domain at the CPA to calculate the subjective collision risk from the perspective of a VTSO for ship collisions in VTS areas depending on the distance to collision, time to collision, and encounter attitude risk between ships. The ship collision risk determined by the CoRI model is similar to that determined by an RO that remotely controls MASS vessels because both assess possible ship collision risk situations in the VTS control center via a VTSO.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Collision Risk Assessment Support System for MASS RO and VTSO Support in Multi-Ship Environment of Vessel Traffic Service Area

Yoo

Lee

2021

JMSE

Self Cite

View full text Add to dashboard Cite

The discussions by the International Maritime Organization for the introduction of a maritime autonomous surface ship (MASS) began in earnest. At the 27th ENAV meeting, the International Association of Marine Aids to Navigation and Lighthouse Authorities proposed the “sharing of a common operating picture for situational awareness of the waterway within vessel traffic service (VTS) environment” when developing a system to support MASS operation. Marine accidents caused by collisions on waterways still account for a high percentage of ship accidents that occur at sea, and many studies have investigated the risk of collision between ships. Collision risk assessment was primarily conducted in ship domain-based safety areas. This study evaluates the collision risk using the ship domain derived by the VTS operator (VTSO) and proposes a real-time collision risk assessment support system to improve the situational awareness of VTSOs and MASS remote operators (MASS ROs) regarding near-collision situations occurring in local waters. To evaluate the validity of the proposed system, a risk analysis was performed on near-collision scenarios at Busan Port. The results show that the distance to the closest point of approach (CPA), time to the CPA, and inter-ship distance converged within 0.5 nautical miles, 10 min, and 3 nautical miles, respectively.

show abstract

Section: Collision Risk Analysis Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Collision Risk Assessment Support System for MASS RO and VTSO Support in Multi-Ship Environment of Vessel Traffic Service Area

Yoo

Lee

2021

JMSE

Self Cite

View full text Add to dashboard Cite

show abstract

“…There have been a number of studies on the risk analysis or assessment of ship collision. Some researchers tend to indicate the risk as a numerical index, such as the Minimum Safety Passing Distance (MSPD) [23,24] and the Collision Risk Index (CRI) [25][26][27][28][29], which is deemed as a numerical form of risk. Whereas, the other way to reflect risk is in two-dimensional graphics, such as Ship Domain (SD) [30][31][32][33], dangerous region (DR) [34][35][36], and action lines (AL) [37,38].…”

Section: Risk Perception Methodsmentioning

confidence: 99%

Review of Ship Behavior Characteristics in Mixed Waterborne Traffic

Tang

Mou

Chen

et al. 2022

JMSE

View full text Add to dashboard Cite

Through the continuous development of intellectualization, considering the lifecycle of ships, the future of a waterborne traffic system is bound to be a mixed scenario where intelligent ships of different autonomy levels co-exist, i.e., mixed waterborne traffic. According to the three modules of ships’ perception, decision-making, and execution, the roles of humans and machines under different autonomy levels are analyzed. This paper analyzes and summarizes the intelligent algorithms related to the three modules proposed in the last five years. Starting from the characteristics of the algorithms, the behavior characteristics of ships with different autonomous levels are analyzed. The results show that in terms of information perception, relying on the information perception techniques and risk analysis methods, the ship situation can be judged, and the collision risk is evaluated. The risk can be expressed in two forms, being graphical and numerical. The graphical images intuitively present the risk level, while the numerical results are easier to apply into the control link of ships. In the future, it could be considered to establish a risk perception system with digital and visual integration, which will be more efficient and accurate in risk identification. With respect to intelligent decision-making, currently, unmanned ships mostly use intelligent algorithms to make decisions and tend to achieve both safe and efficient collision avoidance goals in a high-complexity manner. Finally, regarding execution, the advanced power control devices could improve the ship’s maneuverability, and the motion control algorithms help to achieve the real-time control of the ship’s motion state, so as to further improve the speed and accuracy of ship motion control. With the upgrading of the autonomy level, the ship’s behavior develops in a safer, more efficient, and more environment-friendly manner.

show abstract

“…It reflects the subjective risk pressure that other ships are kept away from the potential collision area of the observer's own ship (Pietrzykowski, 2008). The collision risk model combining the existing ship domain with the CPA is proposed according to the navigator's awareness of the ship encounter situations (Yoo and Lee, 2019). Moreover, the ship domain has been adopted to quantify the potential collision risk, by which the level of collision candidate could be identified.…”

Section: Introductionmentioning

confidence: 99%

Dynamic risk prewarning in ship encounter process considering domain violation

Qin

Guo-liang

et al. 2021

J. Navigation

View full text Add to dashboard Cite

A ship's perception of risk is an important basis for collision avoidance. To improve such perception, several risk measurement parameters on the ship domain are determined, including the approach factor, the time to domain violation (TDV) and the possible collision domain. Then, a risk hierarchy prewarning (RHP) model based on the violation detection of a ship domain is proposed, in which a two-level alarm scheme is adopted accordingly. A low-intensity alarm will be activated by reaching the minimum approach factor and the TDV threshold, and a high-intensity alarm will be activated by the factor of the possible collision domain and the TDV threshold. Subsequently, a novel guard zone in ARPA radar utilising the RHP model has been developed to establish a ship's risk perception system for officers on watch at sea. The model proposed in this paper can not only enhance the veracity of risk assessment around our own ship, but also be used as a decision support system for collision avoidance.

show abstract

Evaluation of ship collision risk assessments using environmental stress and collision risk models

Cited by 26 publications

References 28 publications

Collision Risk Assessment Support System for MASS RO and VTSO Support in Multi-Ship Environment of Vessel Traffic Service Area

Collision Risk Assessment Support System for MASS RO and VTSO Support in Multi-Ship Environment of Vessel Traffic Service Area

Review of Ship Behavior Characteristics in Mixed Waterborne Traffic

Dynamic risk prewarning in ship encounter process considering domain violation

Contact Info

Product

Resources

About