A method for the probabilistic assessment of the on-board comfort on a passenger vessel route

Carchen, Alessandro; Gaggero, Tomaso; Besio, Giovanni; Mazzino, Alessandro; Villa, Diego

doi:10.1016/j.oceaneng.2021.108702

Cited by 11 publications

(3 citation statements)

References 35 publications

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“…Transitioning to upgrades in ocean engineering for VISIR-2, the focus could shift towards targeting large ocean-going vessels, contingent upon the availability of related performance curves. Safety constraints on vessel intact stability (IMO, 2018b); considerations of slamming, green water, and lateral acceleration (Vettor and Guedes Soares, 2016); passenger comfort as highlighted by Carchen et al (2021); or vessel performance in the presence of cross seas could be integrated. Second-generation intact stability criteria (Begovic et al, 2023) could be accounted for through a dynamic masking of the graph.…”

Section: Discussionmentioning

confidence: 99%

VISIR-2: ship weather routing in Python

Mannarini,

Salinas,

Carelli

et al. 2024

Geosci. Model Dev.

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Abstract. Ship weather routing, which involves suggesting low-emission routes, holds potential for contributing to the decarbonisation of maritime transport. However, including because of a lack of readily deployable open-source and open-language computational models, its quantitative impact has been explored only to a limited extent. As a response, the graph-search VISIR (discoVerIng Safe and effIcient Routes) model has been refactored in Python, incorporating novel features. For motor vessels, the angle of attack of waves has been considered, while for sailboats the combined effects of wind and sea currents are now accounted for. The velocity composition with currents has been refined, now encompassing leeway as well. Provided that the performance curve is available, no restrictions are imposed on the vessel type. A cartographic projection has been introduced. The graph edges are quickly screened for coast intersection via a K-dimensional tree. A least-CO2 algorithm in the presence of dynamic graph edge weights has been implemented and validated, proving a quasi-linear computational performance. The software suite's modularity has been significantly improved, alongside a thorough validation against various benchmarks. For the visualisation of the dynamic environmental fields along the route, isochrone-bounded sectors have been introduced. The resulting VISIR-2 model has been employed in numerical experiments within the Mediterranean Sea for the entirety of 2022, utilising meteo-oceanographic analysis fields. For a 125 m long ferry, the percentage saving of overall CO2 expenditure follows a bi-exponential distribution. Routes with a carbon dioxide saving of at least 2 % with respect to the least-distance route were found for prevailing beam or head seas. Two-digit savings, up to 49 %, were possible for about 10 d in a year. In the case of an 11 m sailboat, time savings increased with the extent of path elongation, particularly during upwind sailing. The sailboat's routes were made approximately 2.4 % faster due to optimisation, with the potential for an additional 0.8 % in savings by factoring in currents. VISIR-2 serves as an integrative model, uniting expertise from meteorology, oceanography, ocean engineering, and computer science, to evaluate the influence of ship routing on decarbonisation efforts within the shipping industry.

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Section: Discussionmentioning

confidence: 99%

VISIR-2: ship weather routing in Python

Mannarini,

Salinas,

Carelli

et al. 2024

Geosci. Model Dev.

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“…However, this is not sufficient as a design criterion alone [1], and measurement of navigational quality under service conditions [3] must be carried out because comfort is a key parameter in the design and operation of passenger ships. The main factors affecting comfort are the motion and acceleration experienced by ships while sailing rough waves, which are known to have an impact on passenger comfort and hamper navigational tasks for the crew [4]. In addition, previous research has demonstrated that human error is a major cause of ship accidents [1].…”

Section: Introductionmentioning

confidence: 99%

Assessment of passenger comfort on the fast ferry operating in the strait of Malacca

2023

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The ship operator needs passenger feedback on the comfort of inter-island speed ferries as information on improving passenger comfort services. This paper analyzes the comfort of passengers on fast passenger ferries operating in the Malacca Straits directly. The survey focuses on directly assessing the level of passenger comfort and evaluating the leading causes of passenger discontentment. The strategy adopted is the dissemination of a questionnaire to onboard passengers, with a response rate of around 30 out of a minimum of 24 referring to the SLOVIN formula. The comfort score in the questionnaire is divided into five points, namely: uncomfortable or queasy, dizzy and slightly queasy, dizzy, slightly dizzy, and comfortable. The measured data were validated using Analysis of Variance (ANOVA) and the Dunnett Simultaneous Tests for Differences in Means, which gave a P-value of 0.000 and a degree of confidence of 98.97%. The findings of the study indicated that respondents, on average, rated this ship as slightly uncomfortable to comfortable, giving it a comfort rating of 4.10 out of a possible 5. Moreover, three aspects, namely the ship's motion, the accommodation facilities, and the ship's vibration, significantly contribute to discomfort, as indicated by ratings of 3.8, 4.2, and 4.2, respectively, out of 5 (comfortable), indicating the severity of the effect. Furthermore, by knowing that the main source of passenger discomfort is ship motion, it can be input for ship operators in managing the comfort of ship passengers.

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“…Одним из основных вопросов для скоростных пассажирских судов-тримаранов является обоснование их главных размерений из условия размещения необходимого количества пассажиров [1]. При решении этой задачи необходимо учитывать как архитектурно-конструктивные особенности тримаранов [2], [3], так и возможные варианты оптимального расположения пассажирских мест в пассажирском салоне [4]- [6].…”

Section: Introductionunclassified

Substantiation of the main dimensions of the trimaran from the passenger capacity condition in the tasks of research design

Korepanov¹,

Ronnov²

2022

JWT

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The article presents a study of the relationship between passenger capacity and the main dimensions of passenger vessels-trimarans. The state of this issue has not been sufficiently studied today because there is no methodology to determine what the main dimensions of the central hull and outriggers will be and their location relative to each other along the length and width of the vessel, depending on the necessary passenger accommodation on the vessel. The field of research is the design of ships, in particular the design of passenger trimaran vessels, and the object is to determine the main dimensions of the trimaran vessel from the conditions of passenger capacity. The article reflects the architectural and design features of the trimaran vessel, depending on the location of outriggers on it. Based on the data analysis, dependencies were obtained to determine the main dimensions of the trimaran hull based on the location of a given number of passengers on it.

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A method for the probabilistic assessment of the on-board comfort on a passenger vessel route

Cited by 11 publications

References 35 publications

VISIR-2: ship weather routing in Python

VISIR-2: ship weather routing in Python

Assessment of passenger comfort on the fast ferry operating in the strait of Malacca

Substantiation of the main dimensions of the trimaran from the passenger capacity condition in the tasks of research design

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