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Keywords = megayacht

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9 pages, 3222 KB  
Article
A Sighting of the Indian Ocean Surgeon Fish Paracanthurus hepatus in Eastern Provence (North-Western Mediterranean Sea)
by Charles-François Boudouresque, Olivier Dudognon, Viviane Monneray, Claire Roger and Muriel Verrier
Water 2025, 17(2), 249; https://doi.org/10.3390/w17020249 - 17 Jan 2025
Cited by 1 | Viewed by 3196
Abstract
Two Indian Ocean surgeon fish Paracanthurus hepatus individuals were observed near Saint-Raphaël (Provence, France, north-western Mediterranean Sea) in the late summer of 2024 in Posidonia oceanica seagrass and reef habitats. This species is very popular among aquarium hobbyists in Europe, and a growing [...] Read more.
Two Indian Ocean surgeon fish Paracanthurus hepatus individuals were observed near Saint-Raphaël (Provence, France, north-western Mediterranean Sea) in the late summer of 2024 in Posidonia oceanica seagrass and reef habitats. This species is very popular among aquarium hobbyists in Europe, and a growing number of mega-yachts, such as those which moor in the Saint-Raphaël marina, have seawater aquariums on board. Accidental or deliberate release from one such aquarium is the most probable origin of these individuals. The first individual was speared and the second one was no longer sighted after a September storm. Their establishment is unlikely; however, in the future, with the warming of Mediterranean waters and the rapid increase in the number of mega-yachts, this could change. Yacht owners and their staff should be informed of the risk posed by aquarium discharges. Full article
(This article belongs to the Section Biodiversity and Functionality of Aquatic Ecosystems)
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31 pages, 12259 KB  
Article
An Investigation about Stability in Waves of Large Pleasure Yachts
by Nicola Petacco, Valerio Ruggiero and Paola Gualeni
J. Mar. Sci. Eng. 2023, 11(11), 2039; https://doi.org/10.3390/jmse11112039 - 24 Oct 2023
Cited by 1 | Viewed by 3103
Abstract
The IMO’s second-generation intact stability criteria (SGISc) have been applied to a set of seven megayacht units ranging from 40 m to 80 m. The application aims to evaluate their stability performance in a seaway. The assessment is based on two vulnerability levels, [...] Read more.
The IMO’s second-generation intact stability criteria (SGISc) have been applied to a set of seven megayacht units ranging from 40 m to 80 m. The application aims to evaluate their stability performance in a seaway. The assessment is based on two vulnerability levels, and the related criteria rely on the physics of the phenomena under investigation (dead ship condition, excessive acceleration, parametric rolling, pure loss of stability, and surf-riding). At the same time, SGISc provide methodological approaches to consider possible operational limitations related to the geographical area the vessel is meant to sail. Results of the comprehensive analysis carried out for the selected megayacht units are presented in term of limiting KG curves. Outcomes pointed out that inconsistencies among vulnerability levels still exist. Further comments about the relation of the investigated vessel typology and relevant operational profile have been reported. In addition, systematic analysis of the effect of the main design parameter on ship rules compliance has been carried out. Full article
(This article belongs to the Section Ocean Engineering)
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15 pages, 2460 KB  
Article
Evaluation by a Quantitative Index about Intact Stability Performance in Waves of a Set of Megayacht Units
by Nicola Petacco and Paola Gualeni
J. Mar. Sci. Eng. 2023, 11(4), 814; https://doi.org/10.3390/jmse11040814 - 11 Apr 2023
Cited by 3 | Viewed by 3848
Abstract
Intact stability represents one of the most important topics when addressing ship safety, and it is ruled by the IMO Intact Stability code, evaluating ship stability in a calm water scenario. However, the interest in ship stability in waves has increased in recent [...] Read more.
Intact stability represents one of the most important topics when addressing ship safety, and it is ruled by the IMO Intact Stability code, evaluating ship stability in a calm water scenario. However, the interest in ship stability in waves has increased in recent years and this has led to the formulation of the second generation intact stability criteria (SGISc), finalized at IMO in 2020. In this research, an approach to quantitatively and comprehensively evaluate the ship stability performance in waves has been pursued. A methodology is developed with reference to the SGISc. The intact stability in waves index (ISWI) has been proposed, with the aim to become a complementary tool for designers and shipbuilders in the assessment of stability performance in waves. The ISWI represents a comprehensive stability index, able to capture the stability in waves performance of a vessel. The stability index has been verified on a set of megayacht units and its sensitivity to the wave characteristics has been tested, changing the environmental conditions. The outcomes point to a good agreement between the ISWI and the influence of environmental condition changes on the stability performance. Full article
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21 pages, 5252 KB  
Article
Analysis of Sea Pollution by Sewage from Vessels
by Žarko Koboević, Darijo Mišković, Romana Capor Hrošik and Nikša Koboević
Sustainability 2022, 14(1), 263; https://doi.org/10.3390/su14010263 - 27 Dec 2021
Cited by 10 | Viewed by 6622
Abstract
In this study, we analysed the sea pollution caused by sewage from vessels. The Dubrovnik aquatorium was chosen as a typical sea area that accommodates a variety of vessels in different locations. We sampled the sea at eight different coastal locations over 14 [...] Read more.
In this study, we analysed the sea pollution caused by sewage from vessels. The Dubrovnik aquatorium was chosen as a typical sea area that accommodates a variety of vessels in different locations. We sampled the sea at eight different coastal locations over 14 months and then analysed the samples to determine the presence of the indicators of fecal pollution. Simultaneous with the sampling of the sea, we recorded the number and type of vessels accommodated at the port. These data were applied in chi-square tests, which were used to determine the existence of the relationship of certain types of vessels with fecal coliform bacteria in the sea for each location. The correlation was determined between smaller vessels such as boats, yachts, megayachts, and smaller cruise ships in national navigation with bacteria at sea at the sampling locations. The results can provide an improved understanding of sea pollution due to sewage from vessels. Full article
(This article belongs to the Special Issue Maritime Transportation: Risks, Health and Environmental Protections)
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18 pages, 1619 KB  
Article
Design of Hybrid-Electric Megayachts: The Impact of Operative Profile and Smart Berthing Infrastructures
by Francesco Mauro, Elia Ghigliossi, Vittorio Bucci and Alberto Marinó
J. Mar. Sci. Eng. 2021, 9(2), 186; https://doi.org/10.3390/jmse9020186 - 11 Feb 2021
Cited by 8 | Viewed by 3713
Abstract
Nowadays, sustainable navigation is becoming a trending topic not only for merchant ships but also for pleasure vessels such as motoryachts. Therefore, the adoption of a hybrid-electric propulsion system and the installation of on-board storage devices could increase the greenness of a megayacht. [...] Read more.
Nowadays, sustainable navigation is becoming a trending topic not only for merchant ships but also for pleasure vessels such as motoryachts. Therefore, the adoption of a hybrid-electric propulsion system and the installation of on-board storage devices could increase the greenness of a megayacht. This paper analyses the performance of three commercial propulsive solutions, using a dynamic operative profile and considering the influences of the smart berthing infrastructures. Results compare the yearly fuel consumptions of the analysed configurations for a reference megayacht. Full article
(This article belongs to the Special Issue Zero Emission Shipping)
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