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1

Oksana Telak, Jerzy Telak, and Tomasz Niemczewski. "Motor Boats in the Technology of HDPE with RIB Type Construction." SAFETY & FIRE TECHNOLOGY 61, no. 1 (June 27, 2023): 166–78. http://dx.doi.org/10.12845/sft.61.1.2023.10.

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Aim: In 2022, on the lakes Zegrzynskie and the Orzysz, there were carried out tests of a motor boat with a hull made in HDPE technology and a construction similar to a hybrid boat (rigid-inflatable boat, RIB). The aim of the tests was to examine the operational capabilities of the SRB53 motor boats and obtain preliminary information on the configuration of the equipment. Introduction: High performance motor boats should constitute standard equipment of lifeguards. There are motor boats on the market using high density polyethylene (HDPE) for the construction of their hulls. Methodology: The survey involved 57 people, experts, representatives of public administration, NATO soldiers, police, and rescue services, as well as enterprises and non-governmental entities operating in the field of water rescue. The working hypothesis was assumed that probably motor boats as a combination of HDPE technology with a hybrid boat design could match the operational rib boats and have an advantage in terms of durability and resistance to hull damage. A diagnostic survey was used on a small sample with research techniques, i.e., observation, interview, and test, as well as research tools in the form of an observation sheet. The research was prepared, carried out and closed in the following order: development of the research procedure, collection of research material, development of results, theoretical analysis of the obtained material and derivation of conclusions. The scope of the boat study included going away and nailing to the quay, the boat’s behaviours when making turns and abrupt turns in both directions at different speeds, and the hull durability test. Results: The test results and opinions were positive, many advantages of the hull of the tested boat were indicated, with one negative parameter – a higher weight compared to traditional rescue boats. The working hypothesis was proved: motor boats in HDPE technology with a hybrid boat design are equal in terms of operation to RIB boats and are more durable and resistant to impacts. Innovative HDPE technology is useful for boat production. Due to the purpose, different configuration and equipment of the boat should be assumed. Keywords: motor boats, water rescue, polyethylene, technology, innovation
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2

Yeroshkina, Svitlana. "COST-EFFECTIVENESS OF SAILCLOTH SELECTION FOR DIFFERENT CLASSES, TYPES AND SPECIES OF SAILING BOATS." EUREKA: Physics and Engineering 5 (September 29, 2017): 22–29. http://dx.doi.org/10.21303/2461-4262.2017.00417.

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Results over of theoretical analysis for the selection of corresponding basic material of sail clothes fabric for a different classes, types and views of sailing boats are given in the article. Sailing boats needs the proper of yachting equipment, that goes both with the manipulation of boats and rigging (in accordance of views, classes and types of sailing boats). The material for sailing is elected by participants of competitions depending of the area of navigation, the strength of wind, the whole distances and boat’s possibilities, coming from technical criteria and parameters of the boats. Full analysis of economic efficiency is conducted and price politics of different material’s types for sails in accordance with its chemical composition is analyzed. The most effective type of factory fabric is certain for sewing of sails for racing boats. For a deep scientific analysis and practical realization of the investigated process an accent is done on the exposure of the most popular sailing sailcloth materials used only on the famous world regattas. These results are very important and needed foremost for the first-class skippers of modern world racing boats, to identify most practical and super persistent to the wind, the sun, salt water materials that use in sewing of racing sails. Necessary analyses and descriptions of scientific article concerning sewing of racing sails also will be useful to the yachtsmen that only begin the way in the world of cruise yachting and sporting yachting races. Importance of faithful direction at the choice of material for sails is done not only for the decision element of victories in races and regattas, but also for an answer on many questions, constrained concerning speed of boat, norm of coverage of sails and, in the end, with maneuverability, boat speed.
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Akhmad, Amir, Asdi, Muhammad Yunus Ali, and Anwar. "The Process of Making a Pinisi Boat in Bantobahari District, Bulukumba Regency, Indonesia." European Journal of Engineering and Technology Research 7, no. 5 (October 19, 2022): 70–75. http://dx.doi.org/10.24018/ejeng.2022.7.5.2837.

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Pinisi boats are made by expert hands called panrita lopi (experts in making boats). The pinisi boat has proven its worth by conquering the vast oceans and exploring various countries in the world. This study aims to identify the process of making pinisi boats in Bontobahari District, Bulukumba Regency. This research was conducted in Bontobahari District, Bulukumba Regency, South Sulawesi Province. Data were obtained through in-depth and structured interviews, using key informants who were determined purposively. Key informants consist of; the owner of a pinisi boat-making business, panrita lopi. The analytical technique used in this research is descriptive analysis. in this case, the researcher will describe the process or stages of making a pinisi boat in Bonto Bahari District, Bulukumba Regency. The results showed that the process of making a pinisi boat includes eight stages, namely, preparation, cutting the keel, working on the boat body which includes installation of boat walls, installation of frames, and making of decks, work on pinisi boat rooms, work on sails and sails for pinisi boats, painting of pinisi boats, installation of engines and rudders for pinisi boats, and launching of pinisi boat.
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4

Lirazan, Machir Glib, Ericson Vince Ray Yulo, Maria Therese Kathleen Martir, Regie Antonette Salvilla, Jessica Oñate-Pacalioga, and Manuel Eduardo de la Paz. "Behavioral responses of Irrawaddy dolphins, Orcaella brevirostris (Owen in Grey, 1866) to fishing boats in a globally important marine mammal area in central Philippines." Palawan Scientist 14, no. 2 (December 26, 2022): 43–53. http://dx.doi.org/10.69721/tps.j.2022.14.2.06.

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The Irrawaddy dolphins, Orcaella brevirostris (Owen in Grey 1866) of Guimaras Strait, Philippines, have been known to utilize a core habitat within a coastal area surrounding the Bago River estuary in Negros Occidental. The dolphins’ close dependence on coastal waters often makes unavoidable direct interaction with human communities. Daily human activities in the coastal areas can pose serious threats to the dolphins, including high risk of entanglement in fishing nets, pollution, and disturbances caused by fishing boats and larger vessels. This study determined the behavior of dolphins toward different kinds of boats present in Bago-Pulupandan coastal waters. Factors identified to affect dolphin behavior towards boats include boat type (motorized or not), size, and distance from dolphins. Dolphin behavior towards boats were categorized as either positive, negative, or neutral. Results showed that the dolphins mostly exhibited neutral behavior towards boats, regardless of state and boat type. The dolphins’ passive behavior around vessels may make them more vulnerable to boat strikes, especially from speeding motorized boats. Recommendations include strict regulation of boat speed and traffic within their core habitat to minimize injuries, net entanglement, and avoid mortality.
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5

KIRVESLAHTI, A., K. MIELONEN, K. IKONEN, W. CUI, M. SUVANTO, and T. A. PAKKANEN. "UNDERWATER SLIDING PROPERTIES: EFFECT OF SLIDER SHAPE AND SURFACE WETTABILITY." Surface Review and Letters 23, no. 05 (August 24, 2016): 1650042. http://dx.doi.org/10.1142/s0218625x16500426.

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A dynamic test method for the measurement of the underwater sliding properties of model boats has been developed. Surface-modified model boats were examined to assess how the surface wettability properties affect sliding. Along with the surface properties, the influence of the boat shape was considered. We studied various coatings in the contact angle range of 3–162[Formula: see text] with two model boat shapes. The hydrophobicity of the surfaces influenced the sliding speed of the model boat depending on the boat shape. The method is applicable to study sliding properties of model boats with different surfaces in variable flow conditions.
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6

Aydin, Muhsin, and Aydin Salci. "Geometrical Characteristics of Fishing Boats Series of ITU." Marine Technology and SNAME News 44, no. 02 (April 1, 2007): 125–37. http://dx.doi.org/10.5957/mt1.2007.44.2.125.

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In the present paper, first 13 hull forms of fishing boats with different block coefficients were generated. Later, 26 hull forms of fishing boats with two different ratios of length to beam were generated by utilizing previous hull forms of fishing boats mentioned. In total, 39 fishing boats were generated. This series is called "Fishing Boats Series of ITU" (Istanbul Technical University). In this Series, the forms of the body stations and beams of the boats are the same for equal block coefficient and different lengths. The ratio of the beam of any station at any waterline to the beam of boat, Bz/B varies with respect to block coefficient, CB. These variations have been represented with the third-degree polynomials. Thus, a hull form of the fishing boat in the desired length and block coefficient can be obtained by using these polynomials. For this purpose, a computer program called "Turetme" was developed. Finally, by using this program, three hull forms of fishing boats were obtained and presented here.
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7

Collet, Julien, and Henri Weimerskirch. "Albatrosses can memorize locations of predictable fishing boats but favour natural foraging." Proceedings of the Royal Society B: Biological Sciences 287, no. 1932 (August 5, 2020): 20200958. http://dx.doi.org/10.1098/rspb.2020.0958.

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Human activities generate food attracting many animals worldwide, causing major conservation issues. The spatio-temporal predictability of anthropogenic resources could reduce search costs for animals and mediate their attractiveness. We investigated this through GPS tracking in breeding black-browed albatrosses attracted to fishing boats. We tested for answers to the following questions. (i) Can future boat locations be anticipated from cues available to birds? (ii) Are birds able to appropriately use these cues to increase encounters? (iii) How frequently do birds use these cues? Boats were spatially persistent: birds searching in the direction where they previously attended boats would encounter twice as many boats compared with following a random direction strategy. A large proportion of birds did not use this cue: across pairs of consecutive trips ( n = 85), 51% of birds switched their foraging direction irrespective of previous boat encounters. Still, 15 birds (27%) were observed to closely approach (approx. 0.1–1 km) where they previously attended a boat while boats were no longer there. This is less than the distance expected by chance (approx. 10–100 km), based on permutation control procedures accounting for individual-specific spatial consistency, suggesting individuals could memorize where they encountered boats across consecutive trips. We conclude albatrosses were able to exploit predictive cues from recent boat encounters but most favoured alternative resources.
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8

Johansson, Lasse, Erik Ytreberg, Jukka-Pekka Jalkanen, Erik Fridell, K. Martin Eriksson, Maria Lagerström, Ilja Maljutenko, Urmas Raudsepp, Vivian Fischer, and Eva Roth. "Model for leisure boat activities and emissions – implementation for the Baltic Sea." Ocean Science 16, no. 5 (October 2, 2020): 1143–63. http://dx.doi.org/10.5194/os-16-1143-2020.

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Abstract. The activities and emissions from leisure boats in the Baltic Sea have been modeled in a comprehensive approach for the first time, using a new simulation model leisure Boat Emissions and Activities siMulator (BEAM). The model utilizes survey data to characterize the national leisure boat fleets. Leisure boats have been categorized based on their size, use and engine specifications, and for these subcategories emission factors for NOx, PM2.5, CO, non-methane volatile organic compounds (NMVOCs), and releases of copper (Cu) and zinc (Zn) from antifouling paints have been estimated according to literature values. The modeling approach also considers the temporal and spatial distribution of leisure boat activities, which are applied to each simulated leisure boat separately. According to our results the CO and NMVOC emissions from leisure boats, as well as Cu and Zn released from antifouling paints, are significant when compared against the emissions originating from registered commercial shipping in the Baltic Sea. CO emissions equal 70 % of the registered shipping emissions and NMVOC emissions equal 160 % when compared against the modeled results in the Baltic Sea in 2014. Modeled NOx and PM2.5 from the leisure boats are less significant compared to the registered shipping emissions. The emissions from leisure boats are concentrated in the summer months of June, July and August and are released in the vicinity of inhabited coastal areas. Given the large emission estimates for leisure boats, this commonly overlooked source of emissions should be further investigated in greater detail.
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9

Lund, Thomas. "Variasjon i praksis? Sammenføyingsteknikk – og materiale i nordnorske jernalderbåter." Primitive Tider, no. 21 (December 16, 2019): 45–62. http://dx.doi.org/10.5617/pt.7535.

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Variation in practice? Joining-techniques in North Norwegian iron age boatsThe iron age burial custom where individuals are placed in seafaring vessels has traditionally been associated with large ships or smaller clinker build boats, such as the famous Oseberg ship found in Norway or the Nydam boat from Denmark. The overall impression of boats from this period have thus been that most of the vessels were constructed and joined with iron rivets consisting of a square nail and a dish shaped washer called a rove. A closer study of archaeological remains from boat burials in Northern Norway has revealed that this might not have been the case. By investigating the number and location of the rivets within the burial, several boats appear not to have been purely “clinker built”, but also fastened by a so called “sewing technique”, traditionally associated with older or Sami boatbuilding traditions. In addition, one of the newly found boat burials from Hillesøy in Troms county contained a boat completely lacking iron rivets. The main result of detailed comparison of all Iron Age boat burials from Northern Norway is exemplified by a selection of boats demonstrating varied use of joining-techniques. Furthermore, this article explores the contextual setting of these boats, arguing that the chosen boatbuilding techniques affected the functional aspects of the vessels and is thus related to their maritime activities.
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10

Ahmad Ilham Ramadhani. "Feasibility of Electric Fishing Boats based on Evaluation of Hydrostatic Forces and Resistance." Journal of Advanced Research in Fluid Mechanics and Thermal Sciences 116, no. 2 (May 4, 2024): 75–87. http://dx.doi.org/10.37934/arfmts.116.2.7587.

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Conventional gasoline engine fishing boats have several disadvantages, such as high exhaust emissions, high fuel consumption, and low service life. The disadvantages of the gasoline engine can be resolved by using the electrical engine. Electrical fishing boats is an improvement on conventional boat to reduce the fuel consumption and emissions. In realizing an electric fishing boat, a feasibility analysis of the design, shape and weight that can be accommodated is required. The feasibility of an electric fishing boat has been successfully carried out by simulating the boat on Maxsurf Software. The aim of this research is to analyze feasibility of conventional boats by designing electric fishing boats. Improving feasibility is carried out by calculating hydrostatic forces and resistance. Electric fishing boats design using the simulation model in Maxsurf Modeller and simulation of resistance in Maxsurf Resistance at speeds of 1, 3 and 5 knots, with Wyman method. The modeling results show that the electric fishing boat design has a pointed front configuration with a V-shaped bottom. Main dimensions LoA 3.49 m, width 0.8 m; height 0.5 m; and a draft of 0.2 m, the boat produces a hydrostatic force which includes a displacement of 301.5 kg, a midship draft and submerged area of 0.2 m, a wet area of 3.08 m2, and a waterline of 0.5 – 1.5 m. Testing 1, 3, and 5 knots, the boat experienced resistance of 26.11 N, 234.96 N, and 652.73 N respectively. The power required for the boat to operate was 13,43 W, 362.66 W, and 1678,97 W. The feasibility of designing an electric fishing boat is the main key to developing an electric fishing boat.
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11

Van Parijs, Sofie M., and Peter J. Corkeron. "Boat traffic affects the acoustic behaviour of Pacific humpback dolphins, Sousa chinensis." Journal of the Marine Biological Association of the United Kingdom 81, no. 3 (June 2001): 533–38. http://dx.doi.org/10.1017/s0025315401004180.

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In this study, the indirect (i.e. boats not involved in dolphin viewing activities) impacts of boat traffic on the acoustic behaviour of Pacific humpback dolphins, Sousa chinensis, were assessed in Moreton Bay, Australia. Humpback dolphin acoustic behaviour is affected by transiting boat traffic. Boats' passage did not affect the rates at which dolphins produced click trains and burst pulse vocalizations. However, dolphins significantly increased their rate of whistling immediately after a boat moved through the area. This increase occurred only when boats were less than 1·5 km from the groups. Groups including mother–calf pairs showed an increase in whistles in response to boats' passage. Groups with no calves produced significantly fewer whistles. This evidence suggests that the noise from transiting vessels affects dolphins' group cohesion. Mother–calf pairs appear to be most disturbed by transiting vessels, and exhibit an increased need to re-establish vocal contact.
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12

David, Jonathan A. "Theoretical approach to estimating the induction of hearing impairment in bottlenose dolphins by radiated leisure boat noise." Journal of the Marine Biological Association of the United Kingdom 92, no. 8 (August 30, 2011): 1887–92. http://dx.doi.org/10.1017/s002531541100110x.

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Coastal waters are being subjected to underwater noise generated by increasing numbers of leisure and tour boats. Such noise has the potential to impair the hearing of neighbouring bottlenose dolphins, particularly as the noise from several distributed boats could summate at the point of reception. This potential has been assessed by comparing small boat noise, recorded over a range of 8–532 m, with noise that is known to induce hearing impairment in the form of a temporary threshold shift (TTS) or permanent threshold shift (PTS). Extrapolation of broadband boat noise levels yielded a minimum source sound pressure level of 156 dB re 1μPa at 1 m. An equal-energy model for TTS-onset predicted that boat noise could induce a TTS after 1 hour's exposure at 1.3 m and after 8 hours' exposure at 2.3 m. These distances increased with additional adjacent boats. Leisure boats are unlikely to induce a PTS, even at close range.
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Abdrabou, Ahmed, Eissa Zidan, Akiko Nishisaka, Hiromasa Kurokochi, and Sakuji Yoshimura. "King Khufu’s Second Boat: Scientific Identification of Wood Species for Deckhouse, Canopy, and Forecastle." Forests 13, no. 12 (December 10, 2022): 2118. http://dx.doi.org/10.3390/f13122118.

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Very little published information is available on the scientific identification of wood species used in the construction of boats in ancient Egypt. This paper deals with the scientific identification of wood species used in the construction of the deckhouse, canopy, and forecastle of King Khufu’s second wooden boat (4th Dynasty—Old Kingdom) in detail. This paper also discusses the principal technological characteristics of the identified woods, considering specifically their utilization for construction of the deckhouse, canopy, and forecastle. Almost all the woods used in the boat’s deckhouse, canopy, and forecastle were made of two imported species of wood (Cedrus libani A.Rich. and Juniperus sp.), with two native species (Ziziphus spina-christi (L.) Willd. and Vachellia sp.) also identified. The analysis most surprisingly revealed the presence of Ziziphus spina-christi (L.) Willd. in 25% of the analyzed forecastle samples, which was discovered for the first time for making cross beams in the construction of boats in ancient Egypt. Another intriguing aspect of the boat’s construction is the presence of Juniperus sp., which surprisingly showed that almost 85% of the analyzed samples were Juniperus sp., used in the deckhouse’s boards, frames, and cross beams. The data let us examine the specific employment of the wood species used in the parts of the boat, which evidenced that the identified woods were suitably used for the construction of the different parts of the deckhouse, canopy, and forecastle of the boat.
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Koroza, Aleksandra, and Peter G. H. Evans. "Bottlenose Dolphin Responses to Boat Traffic Affected by Boat Characteristics and Degree of Compliance to Code of Conduct." Sustainability 14, no. 9 (April 25, 2022): 5185. http://dx.doi.org/10.3390/su14095185.

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Levels of boat traffic in coastal seas have been steadily increasing in many parts of the world, introducing pressures on marine wildlife through disturbance. The appropriate management of human activities is important not only to preserve wildlife, but also for the local communities that depend on ecotourism for employment and their economy. This study presents further insight into bottlenose dolphin (Tursiops truncatus) responses to boats in New Quay Bay (West Wales) within the Cardigan Bay Special Area of Conservation. This region is heavily dependent on wildlife tourism, and marine traffic is regulated through a long-standing Code of Conduct. Based on a long-term dataset spanning the months of April to October and the years 2010–2018, the study found that compliance to a code of human behaviour increased dolphin positive responses towards boats. Dolphin responses to individual named boats and to different boat types were examined in greater detail. Speed boats, small motorboats, and kayaks were found to break the code most often, resulting in higher rates of negative response by dolphins. Visitor passenger boats formed the majority of boat traffic in the area, and showed greater compliance than other general recreational crafts. Suggestions are made for the better protection of the coastal dolphin population, as well as the role that citizen science can play to help achieve this goal through working directly with wildlife trip boats and the recruitment of local observers.
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Koroza, Aleksandra, and Peter G. H. Evans. "Bottlenose Dolphin Responses to Boat Traffic Affected by Boat Characteristics and Degree of Compliance to Code of Conduct." Sustainability 14, no. 9 (April 25, 2022): 5185. http://dx.doi.org/10.3390/su14095185.

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Levels of boat traffic in coastal seas have been steadily increasing in many parts of the world, introducing pressures on marine wildlife through disturbance. The appropriate management of human activities is important not only to preserve wildlife, but also for the local communities that depend on ecotourism for employment and their economy. This study presents further insight into bottlenose dolphin (Tursiops truncatus) responses to boats in New Quay Bay (West Wales) within the Cardigan Bay Special Area of Conservation. This region is heavily dependent on wildlife tourism, and marine traffic is regulated through a long-standing Code of Conduct. Based on a long-term dataset spanning the months of April to October and the years 2010–2018, the study found that compliance to a code of human behaviour increased dolphin positive responses towards boats. Dolphin responses to individual named boats and to different boat types were examined in greater detail. Speed boats, small motorboats, and kayaks were found to break the code most often, resulting in higher rates of negative response by dolphins. Visitor passenger boats formed the majority of boat traffic in the area, and showed greater compliance than other general recreational crafts. Suggestions are made for the better protection of the coastal dolphin population, as well as the role that citizen science can play to help achieve this goal through working directly with wildlife trip boats and the recruitment of local observers.
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Golam Rabbani, Md, Md Akhtaruzzaman Khan, M. Serajul Islam, and Rozina Yeasmin Lucky. "Technical Efficiency of the Setbag Net Fishery in Bangladesh: An Application of a Stochastic Production Frontier Model." Agriculturists 15, no. 2 (January 26, 2018): 59–65. http://dx.doi.org/10.3329/agric.v15i2.35465.

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A study was conducted to examine the technical efficiency for Setbag net fishing boats operated in the year 2014. A total of 100 samples of Setbag net fishing boats were selected, of which 40 were from Cox’s Bazar, 40 were from Chittagong and 20 were from Bagerhat. Stochastic frontier (with technical inefficiency effect) model was specified and estimated. Results have shown that the estimated mean technical efficiency of Setbag net fishing boats is 84 percent. The efficiency of Setbag net fishing boat was positively associated with total cost, while the number of nets were negatively related to fishing day and crew size. Head maji’s age had significant effect on inefficiency at 5% level. Although, the effect on boats’ efficiency was positive, (though insignificant) for head maji’s experience, head maji’s education, engine horse power and boat age. The use of modern fishing boat and improved fishing technology should be promoted, through proper training and motivation program for fisher. At the same time old and unfit fishing boat and gears should be gradually removed and replaced by new and modern fishing boat.The Agriculturists 2017; 15(2) 59-65
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Dejhall, Roko, and Dunja Legović. "Disposal of Worn Out Fiberglass Recreational Boats." Journal of Maritime & Transportation Science 2, Special edition 2 (April 2018): 143–53. http://dx.doi.org/10.18048/2018-00.143.

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Mass production of fiberglass boats begun in the mid-50s of the 20th century. Over decades, a large number of such boats accumulated throughout the world. Since the lifespan of these boats is 30 to 50 years, at the moment many fiberglass boats simply arived to the end of their life and need to be appropriately disposed in a safe and environmentally friendly way. It is expected that the disposal of boats will become a more pronounced problem, in which the basic issue is the relatively high cost. The main problem is the fiberglass laminate which constitutes the major part of the boat. As of today, there are no economically viable methods. Many countries do not have special programs for the disposal of worn out fiberglass boats, which would undoubtedly provide the answers to many questions. The paper gives an overview of the disposal conditions of worn out recreational fiberglass boats over the world as well in the Republic of Croatia.
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Papale, Elena, Marta Azzolin, and Cristina Giacoma. "Vessel traffic affects bottlenose dolphin (Tursiops truncatus) behaviour in waters surrounding Lampedusa Island, south Italy." Journal of the Marine Biological Association of the United Kingdom 92, no. 8 (July 22, 2011): 1877–85. http://dx.doi.org/10.1017/s002531541100083x.

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Since 2003, as part of the LIFE project ‘Del.Ta.’ (NAT/IT/000163) a bottlenose dolphin community has been studied in order to assess the impact of increasing boat traffic in the Pelagie Archipelago (Sicily, Italy). During the summer of 2006 and 2008, land-based surveys were carried out at Lampedusa, one of the Archipelago's Islands, at set hours from 6 locations (7 in 2008) in standard weather conditions. Continuous horizon scanning and focal group sampling methods were used to study dolphin presence and behaviour. Dolphin–boat interactions were recorded for each sighting. A total of approximately 559 hours were spent monitoring and 83 sightings were recorded. With regard to the different types of vessels, interaction with sailing boats was always neutral, whereas fast boats caused the interruption of all activities and avoidance behaviour. Positive interaction occasionally occurred with bottom trawling fishing boats. Interactions recorded when fishing and powered engine boats approached within 200 m predominantly resulted in a negative reaction from the dolphins (approximately 70%) and dolphin behaviour was affected in terms of occurrence and patterns. Behavioural analysis showed that the animals reduced the frequency of behaviours related to feeding, social and relaxing activities. The dolphins also increased information-gathering behaviour such as spyhopping. The use of Markovian chain models revealed evidence of disruptions in sub-sequences made up of behaviours often associated with feeding. After boat departures, the animals rarely restarted their previous activity and persistence of this effect could have long-term consequences as a result of non-habituation. Sighting duration also decreased in the presence of vessels. The possible negative long-term effect of the presence of boats may be indicated by the lower mean sighting duration in 2008, when the highest presence of powered engine boats was recorded. In view of the scenario outlined above, local authorities need to enforce the requirement of maintaining a distance of over 200 m away from the animals for all types of boat and also promote regular land-based surveys of vessel impacts for tourist boats and dolphin watching cruises.
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Jung, Bong-Kyu, Cheor-Hong Park, and Won-Sam Choi. "Accuracy of GNSS Position Stored in Fishing Boat Location Transmitters in Comparison with That of DGPS Position." Journal of Marine Science and Engineering 11, no. 7 (June 23, 2023): 1277. http://dx.doi.org/10.3390/jmse11071277.

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Fishing boat laws in Korea require fishing boats to be equipped with a location transmitter. Approximately 91% of registered fishing boats have V-pass terminals, whereas those with a gross tonnage of 10 t or more have either V-pass or automatic identification system (AIS) terminals (or use both). Most navigators, including the fishing boat location transmitter, rely on the satellite signals provided by the global navigation satellite system (GNSS) without considering the accuracy of the navigation instruments that indicate ship location. Many scholars are conducting research to analyze the accuracy of GNSS locations through continuous experiments; however, few of them focus on fishing boat location transmitters. Particularly, the location accuracy of V-pass equipment is unknown. Notably, the V-pass and AIS terminals used in fishing boats are mainly designed to locate fishing boats in need of assistance following a marine accident rather than to provide information on approaching ships and preventing collisions. Therefore, this study aimed to compare GNSS location storage data extracted from the location transmitter (V-pass and AIS terminal) of the accident fishing boat with the DGPS location information from the Electronic Chart Display and Information System to check the position error and use it for accident analysis and investigation.
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Stadler, Anna Theresia, Martin Schönauer, Roozbeh Aslani, Werner Baumgartner, and Tillmann Philippi. "The Impact of a Flexible Stern on Canoe Boat Maneuverability and Speed." Biomimetics 5, no. 1 (February 17, 2020): 7. http://dx.doi.org/10.3390/biomimetics5010007.

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Paddle boats like canoes and kayaks draw a sinusoidal path when a linear movement is intended. The reason for this behavior is that each paddle stroke induces a lateral movement of the boat. In this study, we sought to reduce the so-called yawing motion. We therefore replaced the stiff stern by a flexible stern, which is based on the Fin Ray Effect®. We built down-scaled boat models and tested them in a water channel. The similarities between experimental and original setup were evaluated by means of a dimensional analysis. (Thermoplastic) elastomers with various flexibility were used for the stern construction. In the experiments conducted in the water channel, we determined the forces acting on the boat with different stern models. The results reveal that the flexible stern induced a torque counteracting the boat’s deflection, while the stiff stern caused a torque enhancing it. A paddle boat with a flexible stern could hence be a promising new method to reduce the boat’s yawing movement.
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Abrianto, Octaviadi. "Perahu Pangalengan." PANALUNGTIK 2, no. 1 (November 27, 2019): 32–42. http://dx.doi.org/10.24164/pnk.v2i1.20.

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People of Warnasari village found an iron boat on the bottom of Situ Cileunca Lake, the boat is made from iron sheets with flat keel. The iron sheets was bound together using iron rivets and the boat have hooks that look like use to attact to other boats. Flat keel boat usually use on calm water such as river or lakes, boat using rivet usually build before 1930’s as after that year boats were build using welding technic. It’s assumed that boat from Situ Cileunca was used for ferrying goods or peoples, the exact function can’t determine precisely due to lack of data.
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Yu., OZHEREDOV. "PALEO-SELKUPS' BURIAL IN BOATS." Teoriya i praktika arkheologicheskikh issledovaniy 35, no. 4 (2023): 83–112. http://dx.doi.org/10.14258/tpai(2023)35(4).-05.

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The article presents the results of field and desk research of burials in boats left by the Narym (southern) Paleo-Selkup people (16th-17th centuries). It examines the burial structures, the form of the discovered boats, and details of burial and commemorative rituals. The study is based on the findings identified and studied by the author from mounds 13 and 13A of the Kustovsky burial ground, left by representatives of the locally-dialectal Shiyesgula group. Published data from paleoethnography and ethnography on similar rituals among other groups of Narym Paleo-Selkup people are used as comparative material. Burials were performed under small mounds in shallow pits, which were previously burned before the boats were placed in them as containers for the deceased in their entirety, without dismemberment. The boat bottoms were supported by beam supports, and the pits were covered with wooden planks. Carved boats of two types were used for burial: a pointed prow and a blunt-sterned dugout. The form of the prow corresponds to the ethnographically documented shamanic boat called“rontyk,” which is also a boat for guiding the dead to the aft erlife. The deceased were laid on their backs, with their heads in the stern and their feet downstream.”
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Yuliadi, Yuliadi, Mohammad Taufan Asri Zaen, Marzuki Adami, and Abdul Gofur. "Implementasi Arduino Atmega pada Pompa Air Automatik Perahu Nelayan Gili Marinkik Lombok Timur." BEES: Bulletin of Electrical and Electronics Engineering 3, no. 1 (February 22, 2023): 1–7. http://dx.doi.org/10.47065/bees.v3i1.2443.

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Maringkik is a small island located in the south of the island of Lombok which is included in the territorial area of East Lombok Regency, West Nusa Tenggara. Gili Meringkik fishermen are active in catching fish using boats whose raw materials are made of wood which is prone to leakage. In the condition of a leak, the fishermen pump water into their boats or experience manual leakage continuously. Based on these problems, an automatic device is needed as a water pump in fishing boats to increase the amount of production. The device is a water pump on a boat using an Arduino microcontroller-based Ultrasonic Sensor. The research was conducted to build a water pump that enters the fishing boat automatically. The working system of this tool is if any water enters the bottom floor of the ship with the ultrasonic sensor water level when it detects the water level is, and the water pump will be active to immediately suck the water out of the ship so that the ship does not sink. This tool can help fishermen with removing the water that enters the boat. In addition, so that fishermen can easily control the boat from afar, this tool is able to discharge water on fishing boats automatically when the water level has exceeded the height limit, which interferes with sailing.
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Tooley, A. M. J. "An Unusual Type of Model Boat." Journal of Egyptian Archaeology 72, no. 1 (August 1986): 189–92. http://dx.doi.org/10.1177/030751338607200118.

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A new category of model boat is proposed, based on the Merseyside County Museum model Liv. 55.82.17 and a comparison with similar models and reliefs depicting small, working boats. Five distinctive features distinguish this class from other model boats, as realistic representations of small, shallow water craft for fishing and cargo conveyance.
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Aguilar, Glenn D. "The Philippine Indigenous Outrigger Boat: Scaling Up, Performance and Safety." Marine Technology Society Journal 40, no. 3 (September 1, 2006): 69–78. http://dx.doi.org/10.4031/002533206787353277.

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The traditional indigenous double outrigger crafts, called banca boats, of the Philippines vary in size from the very small 4 meter single crew paddle boats to large 50 meter fishing vessels and passenger ferry boats. Regardless of size, the same construction techniques are used by native boat builders with wood as the main building material. Many hull forms, particularly economically important fishing boats, have been scaled up, resulting in problems related to the availability of wood for construction, safety at sea, and performance. Model experiments on craft performance show the hydrodynamic characteristics of the double outrigger form and describe characteristics important for design, construction, and operation of the crafts. The presence of outriggers has a definite effect on the heave, pitch, and roll motion of the craft as compared to the hull without an outrigger. Data analyses of maritime incident reports show a high percentage of capsizing by these motorized banca boats, highlighting the need for some regulation of their design and construction. Other concerns related to fisheries as being the main area of use of these boats are further discussed.
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Utama, Danu, Ahmad Nasirudin, and Muhammad Iqbal. "Design of River Tour Boat’s Hull For Taman Nasional Tanjung Puting, Central Borneo." Kapal: Jurnal Ilmu Pengetahuan dan Teknologi Kelautan 17, no. 1 (February 16, 2020): 28–39. http://dx.doi.org/10.14710/kapal.v17i1.28007.

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Tanjung Puting National Park is a natural wildlife park with a positively increasing trend in the number of visitors. The transportation which is utilized in Sekonyer river is ‘klotok’ boat, a traditional tour boat modified from a fishing boat. The design of a fiberglass-based tour boat is needed to accommodate the limitation of Kalimantan’s logs, which become the main structural components of klotok and to comply with the technical characteristic of the river. The purpose of this study is to obtain the optimum main dimensions of the fiberglass-based tour boat and its hull form design. The method performed to obtain the main dimension of the boat is non-linear optimization with the help of solver in Microsoft Excel software. The process of boat’s hull design is done by line distortion approach where the shape of a reference boat’s hull is conformed to a particular size and hydrodynamical coefficients, which are obtained from the optimization process. The result of optimization process is the main dimension of the boat (Lpp = 12.23 m, B = 2.70 m, H = 1.14 m, T = 0.80 m and Cb = 0.55). By conducting a series of calculations, the obtained value of the total boat’s resistance worths 2,427 N. Therefore, the number of boat’s power needed is less than the power of existing boats. The boat’s hull also complies with technical requirements and regulations, which are freeboard and intact stability.
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Shvetsova, Svetlana. "Development of service infrastructure for private motor boats in the northern regions." E3S Web of Conferences 471 (2024): 01001. http://dx.doi.org/10.1051/e3sconf/202447101001.

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This article examines the current trends in the development of infrastructure for the maintenance and repair of private motor boats in the northern regions (on the example of the Republic of Sakha (Yakutia)). A survey of motor boat owners in three different groups was conducted. The survey data provide data on the most relevant areas of infrastructure development for the maintenance and repair of private motor boats in the region. Results of the study of current trends in the development of infrastructure for maintenance and Repair of private motor boats can be used for the development of programs for the development of water transport infrastructure, by manufacturers of motor boats, as well as in conducting new research in this area.
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Sobsey, M. D., R. Perdue, M. Overton, and J. Fisher. "Factors influencing faecal contamination in coastal marinas." Water Science and Technology 47, no. 3 (February 1, 2003): 199–204. http://dx.doi.org/10.2166/wst.2003.0195.

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Recreational pleasure and fishing boats are potential sources of human faecal contamination because the sanitary wastes from boat occupants may be discharged into the surrounding water. The impacts of such faecal contamination from boats is potentially high in marinas where boats are often kept and occupied for varying periods of time. The nature and extent of such faecal contamination from boats in marinas of different design and use is still inadequately understood. In this study the levels of faecal coliform (FC) bacteria were measured in the waters of a confined and an open water marina over a 6 d period encompassing a holiday weekend. Levels of FC rose with increasing occupancy by boats and boaters during the study period and then declined again. FC levels were higher in waters of a confined or basin marina than in waters of an open or unconfined marina. In both confined and open water marinas, FC levels were highest in water samples collected near boats but they also became elevated on occasion in water samples taken a distance of 305 m from boats. Concentrations of FC in marina waters exceeded the standards and guidelines for shell-fishing and primary contact recreation waters. Therefore, greater consideration of human health risks from enteric microbes in marina waters and shellfish is recommended.
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Kassamali-Fox, Ayshah, Fredrik Christiansen, Laura J. May-Collado, Eric A. Ramos, and Beth A. Kaplin. "Tour boats affect the activity patterns of bottlenose dolphins (Tursiops truncatus) in Bocas del Toro, Panama." PeerJ 8 (March 30, 2020): e8804. http://dx.doi.org/10.7717/peerj.8804.

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Bottlenose dolphins (Tursiops truncatus) of the Bocas del Toro archipelago are targeted by the largest boat-based cetacean watching operation in Panama. Tourism is concentrated in Dolphin Bay, home to a population of resident dolphins. Previous studies have shown that tour boats elicit short-term changes in dolphin behavior and communication; however, the relationship of these responses to the local population’s biology and ecology is unclear. Studying the effects of tour boats on dolphin activity patterns and behavior can provide information about the biological significance of these responses. Here, we investigated the effects of tour boat activity on bottlenose dolphin activity patterns in Bocas del Toro, Panama over 10 weeks in 2014. Markov chain models were used to assess the effect of tour boats on dolphin behavioral transition probabilities in both control and impact scenarios. Effect of tour boat interactions was quantified by comparing transition probabilities of control and impact chains. Data were also used to construct dolphin activity budgets. Markov chain analysis revealed that in the presence of tour boats, dolphins were less likely to stay socializing and were more likely to begin traveling, and less likely to begin foraging while traveling. Additionally, activity budgets for foraging decreased and traveling increased as an effect of tour boat presence. These behavioral responses are likely to have energetic costs for individuals which may ultimately result in population-level impacts. Boat operator compliance with Panamanian whale watching regulations is urgently needed to minimize potential long-term impacts on this small, genetically distinct population and to ensure the future viability of the local tourism industry.
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Li, Kaipeng, Yunge Wang, Yuan Shao, and Xingxiao Wu. "Smart Boat Detection Based on Feature Pyramid Network and Deformable Convolution." Journal of Physics: Conference Series 2083, no. 4 (November 1, 2021): 042018. http://dx.doi.org/10.1088/1742-6596/2083/4/042018.

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Abstract The submarine cable guarantees the electricity and communication of the island residents. The operation of fishing boats poses a major threat to the submarine cable. Due to the complex environment, manual monitoring has defects such as strong subjective factors and easy fatigue. The paper adopts the intelligent monitoring method, using the object detection algorithm based on deep learning and the camera to monitor the boats on the sea. Use feature pyramid network to enhance the detection of smaller and farther boats. Use deformable convolution to solve the problem of few samples. Experimental results show that model can detect boats. The detection ability of the feature pyramid network is stronger, especially for the distant and smaller boat targets. Using deformable convolution can improve the accuracy of models trained on small dataset.
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31

Svitlana, GALKO, and OSIIEVSKA Valentyna. "EXPORT-IMPORT POTENTIAL OF THE MOTOR BOAT MARKET OF UKRAINE." INTERNATIONAL SCIENTIFIC-PRACTICAL JOURNAL "COMMODITIES AND MARKETS" 36, no. 4 (December 10, 2020): 29–42. http://dx.doi.org/10.31617/tr.knute.2020(36)03.

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Background. The economic crisis caused by the COVID-19 pandemic has revea­led most popular products in the global market among consumers, in particular those for spending leisure time alone. Among them, surprisingly, motor boats were found. In Ukraine, increasing the production of certain types of watercraft may be a chance to save the entire shipbuilding industry. The aim of the article is to analyse the state and the structure of the world and domes­tic markets of motor boats in order to establish possible directions for the development of the export potential of Ukraine. Materials and methods. The methods of logical analysis and generalization of scientific literature, statistical data on the export and import of goods were used; the tools of market analysis of the International Trade Centre (ITC) were applied. Results. The state of the motor boats world market is analysed according to im­port data. The main consumers of these motor boats and trends of theirs changes in 2005–2019 were studied. The data on the motor boats import to Ukraine is provided. The count­ries-exporters of motor boats are considered and their future potential is determined. The data on the motor boats export from Ukraine is given. The level of tariff protection by diffe­rent countries of the world in relation to motor boats from Ukraine is assessed. Conclusion. When planning a strategy for the development of motor boats ex­port, Ukrainian enterprises should take into account that most of the importing countries of motor boats do not impose tariff protection in relation to Ukraine, and where it is pre­sent at a sufficiently high level, there is no significant consumption of motor boats. For the development of a trade partnership in the direction of exporting motor boats, Ukraine should choose the Cayman Islands, the Netherlands, Malta, the United States of America, the British Virgin Islands, France, Gibraltar, Spain, Canada and the Seychelles –the largest consumers of motor boats. Ukraine needs to pay special attention to the Netherlands, Italy and Germany – countries that will hold the leading exporters position of motor boats for a long time. Cooperation with manufacturers of these countries in the global supply chain of motor boats to the world market could be very useful not only for motor boat manufacturers, but also for manufacturers of individual parts and accessoriesfor motor boats.
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32

Amuthakkannan, Rajakannu, K. Vijayalakshmi, Saleh Al Araimi, and Maamar Ali Saud Al Tobi. "A Review to do Fishermen Boat Automation with Artificial Intelligence for Sustainable Fishing Experience Ensuring Safety, Security, Navigation and Sharing Information for Omani Fishermen." Journal of Marine Science and Engineering 11, no. 3 (March 16, 2023): 630. http://dx.doi.org/10.3390/jmse11030630.

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Fishing wealth is one of the richest resources in the Sultanate of Oman. It is considered as one of the most important economic developments that nation depends on in a larger way. The Sultanate of Oman is characterized by the presence of a large fishing fleet as the number of fishing vessels and boats in it. Good research with the application of modern technology in fishermen boats is required to increase the quality of fishing by providing fishermen with a safe and secure fishing experience. Artificial intelligence (AI) in boat automation technology is new and it is a mandatory demand for Oman’s fisheries sector. At the time of fishing, there are a lot of problems fishermen face such as weather changes, border tracking, navigation, illegal fishing, pirate attack, oil spill, technical fault in boats, etc. Therefore, the application of AI and related techniques in boat automation, information sharing, and preparation of documentation resources is very important in this sector. The main requirement for a fisherman is a high-quality fishing boat with proper communication devices to provide all the required information to fishermen and the control room. In this paper, a review has been made on fishermen’s boats with artificial intelligence for a sustainable fishing experience ensuring safety, security, navigation, and sharing information for Omani fishermen.
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33

Garrick, Ombor Pereowei, Jasper Agbakwuru, and Modestus Okwu. "Empirical Method to Predict the Performance of Human Powered Mono Hull Boats." International Journal of Engineering and Technologies 8 (August 2016): 83–93. http://dx.doi.org/10.18052/www.scipress.com/ijet.8.83.

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An empirical method to predict the performance of a human powered mono hull boat is presented in this paper. Results from the experiments were plotted in a graph format suitable for easy use to predict the performance of the boat under various operational conditions. Example cases were used to illustrate how the graphs are used. It was deduced from the graphs that it is possible to use human powered monohull boats to cover a distance as much as 81km in less than 12 hours in sheltered waterways or rivers with minimal number of passing power boats. The results of the study also revealed that it is also possible for human powered boat user to travel a distance longer than 200km when pedalling with input power less than 50watt. The study shows that there is high potential in the use of human powered mono hull boats for useful and sustainable transport purpose, especially in developing countries. The experimental method used in this study, proved that without conducting expensive resistance test in model basins, the performance of a human powered mono hull boat could be adequately predicted.
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Garrick, Ombor Pereowei, Jasper Agbakwuru, and Modestus Okwu. "Empirical Method to Predict the Performance of Human Powered Mono Hull Boats." International Journal of Engineering and Technologies 8 (August 9, 2016): 83–93. http://dx.doi.org/10.56431/p-61bqe1.

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An empirical method to predict the performance of a human powered mono hull boat is presented in this paper. Results from the experiments were plotted in a graph format suitable for easy use to predict the performance of the boat under various operational conditions. Example cases were used to illustrate how the graphs are used. It was deduced from the graphs that it is possible to use human powered monohull boats to cover a distance as much as 81km in less than 12 hours in sheltered waterways or rivers with minimal number of passing power boats. The results of the study also revealed that it is also possible for human powered boat user to travel a distance longer than 200km when pedalling with input power less than 50watt. The study shows that there is high potential in the use of human powered mono hull boats for useful and sustainable transport purpose, especially in developing countries. The experimental method used in this study, proved that without conducting expensive resistance test in model basins, the performance of a human powered mono hull boat could be adequately predicted.
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35

Darmawan, Akbar Bagus, Yeddid Yonatan Eka Darma, and Jangka Rulianto. "Analysis The Effect of Outrigger (Cadik) Variations on Motion Response of Fishing Boat Using CFD Method." IOP Conference Series: Earth and Environmental Science 1081, no. 1 (September 1, 2022): 012010. http://dx.doi.org/10.1088/1755-1315/1081/1/012010.

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Abstract Jukung is a type of traditional fishing boat used as transportation for fishing activities in Muncar, Banyuwangi, which has a wave as high as 2 m with a period of 4.6 s which is classified as 2nd sea state. One of the boats used has a length of 7.2 m, width 0.75 m, and height of 0.8 m. The characteristics of the hull which with an L/B ratio of 9.6 require outriggers to help balance while sailing. The outrigger itself is a cylindrical component that is placed at a certain distance on both sides of the boat. Since ancient times, the construction of outrigger boats has been carried out by local artisans by relying on experience. This is certainly very risky because it is not known for certain whether the construction, in this case, the outrigger can keep the boat stable. For this reason, we researched the boat’s motion using the CFD method to provide a reference for the construction of the outrigger design. Using one of the existing boats with LOA 7.2 m, B 0.671 m, and H 0.8 m, and Vs 4.385 kt as a simulation model, we varied the outrigger-centerline distance by 2.5 m and 2.8 m; diameters of 90 mm, 120 mm, and 150 mm; which tested under conditions of full load and light load with the wave directions of headsea (180°), headquarter (135°), and beamsea (90°), resulting in Response Amplitude Operator (RAO) as follows. The model with an outrigger-CL distance of 2.8 m and diameter of 150 mm has the lowest heaving value of 0.02 m/m at a frequency of 4.1 rad/s from the headsea direction, 0.44 m/m at a frequency of 3.7 rad/s from the headquarter direction, and 0.4 m/m at a frequency of 6.2 rad/s from the beamsea direction. This model also has the lowest value in pitching and rolling responses from all directions with each value of 0.4 rad/m to 0.15 rad/m in pitching and relatively 0 rad/m in rolling responses.
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36

Cecchetti, Arianna, Karen A. Stockin, Jonathan Gordon, and José M. N. Azevedo. "Short-term effects of tourism on the behaviour of common dolphins (Delphinus delphis) in the Azores." Journal of the Marine Biological Association of the United Kingdom 98, no. 5 (May 25, 2017): 1187–96. http://dx.doi.org/10.1017/s0025315417000674.

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Short-term measures of behavioural responses of cetaceans to tourism operations have been used in many studies to interpret and understand potential long-term impacts of biological importance. The short-beaked common dolphin (Delphinus delphis) is the species most frequently observed in the Azores and constitutes an important component of the marine mammal tourism industry in this region. This study investigated the potential effects of tour boats on the behaviour of common dolphins off São Miguel, Azores, with particular focus on the changes in activity budget and the time required to resume activities after a tour boat interaction. Behavioural data were collected from land using a group focal-follow methodology. Markov chains were applied to analyse control and interaction sequences and to assess behavioural transition probabilities in both scenarios. In the presence of tour boats, dolphins significantly reduced the time spent foraging and increased the time engaged in other high energy activities. Dolphins also took significantly longer to resume feeding after an interaction occurred. The average bout length varied significantly between control and interaction scenarios, with foraging bouts being shorter during tour boats interactions. The results presented have management implications since feeding is a biologically critical activity. Disruption of foraging behaviour could lead to a decrease in energy intake for this population. With cetacean tourism likely to increase in the future, a precautionary approach to issuing new licences is advisable and any expansion would warrant an appropriate monitoring programme.
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Kılıç, Alper, and Emrah Akdamar. "Market Segmentation of Leisure Boats Exhibited in the Boat Show by Using Multivariate Statistical Techniques." Pomorstvo 34, no. 2 (December 21, 2020): 291–301. http://dx.doi.org/10.31217/p.34.2.10.

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The aim of this study is to segment recreational boats according to their basic parameters in order to develop marketing strategies and to investigate the benefit/cost factors in consumer preferences across segments. For this purpose, 69 recreational boats under 10 meters exhibited at the Istanbul Boat Show were clustered using basic parameters. In the study, in which hierarchical clustering and multidimensional scaling analysis were used, the boats were divided into four clusters and these results were intended to create an input in the marketing strategies of the boats. These clusters are labelled from the lowest segment to the highest segment, A, B, C and D in ascending order. Based on the calculated averages of these segments for five variables, their intended use is introduced. This segmentation provides guiding findings in different areas such as marketing, advertising and production strategies from the arrangement of the boats within the fair. In addition, alternative actions have been determined for both the customer and the seller by revealing the costs to be incurred in the event that customers prefer different segments.
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Hemez, Colin, Joy Chiu, Emma C. Ryan, Jia Sun, Robert Dubrow, and Michael Pascucilla. "Environmental and health impacts of electric service vessels in the recreational boating industry." Water Practice and Technology 15, no. 3 (July 13, 2020): 781–96. http://dx.doi.org/10.2166/wpt.2020.063.

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Abstract Recreational boating is increasing in popularity worldwide, prompting challenges concerning pollution management, aquatic ecosystem preservation, and waterway access. Electric boating technology may provide a sustainable alternative to gasoline-powered boats, helping to address these challenges. In this study, the environmental and health impacts associated with using electric service vessels in the recreational boating industry were assessed. The focus was on pump-out boats, which enable the sanitary management of human waste generated onboard recreational vessels, as a tractable model of the whole recreational boating service sector. To query stakeholder attitudes about changing to electric technology, surveys were distributed to a nationwide network of pump-out boat service providers. A wide range of attitudes exists among this group towards the adoption of electric technology, and financial concerns dominate the anticipated barriers to electric technology adoption. A life-cycle assessment of electric and gasoline-powered pump-out boats revealed that electric boats have lower lifetime greenhouse gas emissions than do gasoline-powered equivalents, especially when electric boats are charged using renewable resources. Our study demonstrates that already-existing electric technology is a sustainable alternative to gasoline combustion in the boating service sector, and identifies the key challenges remaining for the widespread adoption of electric service boats.
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39

Gaudet, Carolyn A., and Christopher M. Somers. "American White Pelicans and Recreational Boaters on Lakes of the North American Great Plains: Habitat Use Overlap." Open Ornithology Journal 7, no. 1 (March 7, 2014): 1–10. http://dx.doi.org/10.2174/1874453201407010001.

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Shoreline development and boating on lakes of the northern Great Plains of North America have increased due to recent economic prosperity. Few studies have examined the general characteristics of habitats used by foraging waterbirds and boats to determine levels of overlap. To address this issue, we conducted point count surveys of American White Pelicans (Pelecanus erythrorhynchos) and boats on two important recreational lakes in southern Saskatchewan, Canada. The majority of pelicans and boats detected used near-shore areas of the lakes, identifying the importance of shallow water habitats and providing evidence of significant overlap. The location of pelicans relative to the shore did not change in the presence of boats, and there was no significant relationship between boat numbers and pelican numbers. These analyses suggest that pelicans did not make major changes to their habitat use on the lakes as a result of boating activity. When pelicans and boats were present simultaneously at point count locations, pelicans appeared to avoid boats on one lake, but showed no detectable avoidance behavior on the other lake. The importance of interactions between recreational boating and foraging pelicans is currently unclear. Set-back distances to protect foraging pelicans from boating activity do not appear necessary based on our analyses.
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Premur, Vitomir, Aleksandra Anić Vučinić, Ivana Melnjak, and Lucija Radetić. "Challenges and possibilities for environmentally sound recycling of ships and composite boats in European union." Holistic approach to environment 9, no. 2 (June 24, 2019): 35–43. http://dx.doi.org/10.33765/thate.9.2.3.

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In this paper are presented challenges that countries of European Union face when recycling ships and composite boats. European ship owners control over 40 % of the world’s merchant ship fleet, with Greece as the top ship-owning country globally. Nowadays, ship recycling is being regulated and positive progression was made towards it since steel industry belongs in world’s top five and stable market and makes recycling of scrap metals from ships attractive. On the other hand, yachts, sailing boats and small boats are mainly made from composite materials because of their favourable properties, making them great investment, but end-of-life management is more complicated and not quite regulated by the law yet. Unlike commercially oriented ships, which are constantly in move and disposed when the maintenance costs of the vessel start to exceed possible revenue, old boats for recreational and tourism-oriented purposes most rarely move. Hundreds of thousands lie in marinas and are abandoned due to the maintenance costs thus discouraging the owners from keeping it. Hence, a growing number of marinas worldwide will have the problem of boat disposal in a sustainable way in the future. In this paper is given short summary on waste ships and boats management issues. The emphasis is on waste management of small composite boats
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41

Pahlevi, Mohammad Fachrurezky, Vita Rumanti Kurniawati, and Yopi Novita. "Suitability of engine power for small-sized fishing boats at the Palabuhanratu Fishing Port." BIO Web of Conferences 112 (2024): 03003. http://dx.doi.org/10.1051/bioconf/202411203003.

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Since fuel is a significant item in fishing operation, its high price becomes a burden for fishers and boat owners so they have to improve the economic efficiency of fishing operation. This study reviews the suitability of the dimensions of fishing boats with the power of the engine to determine a strategy in addressing an issue in fuel consumption. The suitability was assessed by comparing the existing engine power with the theoretical power required by the boats and the amount of fuel carried onboard during their fishing trips with the theoretical amount of fuel needed. The results showed that most small-sized boats at Palabuhanratu had engines with power more than the requirement, except for wooden boats that used 40 PK outboard motor engines. Fishers tend to carry fuel 62.1% more than the theoretical requirement because of the use of larger engines and the needs to bring spare fuel.
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Underwood, Mark J. "Patrol Boats: A World Market Overview." Marine Technology and SNAME News 33, no. 02 (April 1, 1996): 101–7. http://dx.doi.org/10.5957/mt1.1996.33.2.101.

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This is a brief discussion of "patrol boats" from a marketing analysis viewpoint. The methodology of analyzing a foreign navy's current fleet and projected acquisitions is described. The factors affecting the purchase of ships or systems are given. There is a detailed discussion of "definition," including the parameters that are used in defining classes of ships. Examples of representative ships that fall into a given definition are shown. The importance of properly defining a ship, especially in the patrol boat class, is discussed. The world market in patrol boats is then presented. The data are broken down with numbers and value of existing ships plotted by vessel type and region. Finally, future projections for the patrol boat market are given
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43

Duda, Dariusz, and Wojciech Litwin. "The catamarans George and Energa Solar." Polish Maritime Research 14, no. 3 (July 1, 2007): 3–6. http://dx.doi.org/10.2478/v10012-007-0011-3.

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The catamarans George and Energa Solar Since a few years students of the Faculty of Ocean Engineering and Ship Technology, Gdansk University of Technology, have designed and built untypical floating units. Until last year their efforts were focused mainly on leg-driven boats. The boats of interesting design have taken part in yearly competitions: the International Waterbike Regatta. Their advanced design made it possible to compete with the best boats from Croatia, Holland, Germany, Turkey and Italy. Recently the students have designed and built a solar-energy-driven boat. It is the catamaran Energa Solar which took part in a prestigious regatta: the Frisian Nuon Solar Challenge carried out in Holland in summer 2006.
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44

Mohan, Thamizhmani, and Zereghaber Araya. "Design and Fabrication of Fiber Reinforced Boat in Eritrea." International Journal of Contemporary Research and Review 9, no. 08 (August 30, 2018): 20207–43. http://dx.doi.org/10.15520/ijcrr/2018/9/08/587.

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Transportation through water body is the cheapest and the most important way of transportation system in human life. Eritrea has a wide range of coastal area along Red Sea and it is obvious that those people who live in the coastal area were used to fishing. Wood is one of the easiest and ancient materials that have been utilized for the construction of boats and it also remains as a favorite one for many professionals, but the boats which were constructed of woods were much heavier in their light weight, therefore they couldn't carry more loads. Scarcity and high price of the timber along with the high annual repair and maintenance cost will reduce the income of the boatmen and also increased consumption of timber will results in faster deforestation. In this situation, various alternative materials like ferrocement, aluminium, fibre reinforced glass and fibre reinforced concrete has been used as an alternative material for construction of boats. So, our first work in the fabrication of the boat is to choose the alternative material for fabricating a vessel. Plywood has lots of advantages like they are stiffer than boards of equal thickness of regular lumber. Due to the stiffness of the plywood panels, weight can be saved by replacing the regular lumbar by plywood, which is an important problem faced in both power and sail boats. Fiber glass along with resins has many advantages like thermal insulation, electrical insulation, reinforcement, heat and corrosion resistant and easily recyclable for future purposes. This technique of fabrication will give good results by reducing the problems with leakage and bio fouling of hull surface due to marine growth such as barnacles and in turn which increases the life span of the hull surface of the boats. So this work will be useful for those communities who are working with the boats for their transportation and fishing activities and it also improves the standard of the fisherman and their activities. By design and constructing a boat with plywood and FRG, the quality and standard of the boat will be improved along with a certain degree of safety. As a student of marine engineering department, this research work increase the knowledge about design software’s like solid works and delft ship, design parameters of a vessel and all the fabrication procedures of the boat by using fiber reinforced glass in combination with plywood.
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45

Arif Budiyanto, Muhammad, Mohammad Zyan Beckham, Gerry Liston Putra, and Achmad Riadi. "Study on Design of Hybrid Diesel-Electric Motor Propulsion System for Eco-Tourism Boat." Journal of Physics: Conference Series 2739, no. 1 (April 1, 2024): 012053. http://dx.doi.org/10.1088/1742-6596/2739/1/012053.

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Abstract Indonesia as a maritime country has extraordinary marine tourism potential. On the other hand, the development of eco-tourism boats is still limited. The objective of this study is to investigate the design of diesel-electric hybrid propulsion system for a tourist boat with capacity of 10 passengers. The design of eco-tourism boats considers a trimaran hull using hybrid diesel-electric motor propulsion with an overall length of 12 meters and a block coefficient of 0.4. The performance of the proposed eco-tourism boat was investigated by a simulation model to obtain the required power and stability criteria. The simulation result shows the proposed eco-tourism boat can achieve the desired service speed of 13 knots with the required power is 390 kW.
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46

Robins, Carolyn M., You-Gan Wang, and David Die. "The impact of global positioning systems and plotters on fishing power in the northern prawn fishery, Australia." Canadian Journal of Fisheries and Aquatic Sciences 55, no. 7 (July 1, 1998): 1645–51. http://dx.doi.org/10.1139/f98-037.

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The impact of global positioning systems (GPS) and plotter systems on the relative fishing power of the northern prawn fishery fleet on tiger prawns (Penaeus esculentus Haswell, 1879, and P. semisulcatus de Haan, 1850) was investigated from commercial catch data. A generalized linear model was used to account for differences in fishing power between boats and changes in prawn abundance. It was found that boats that used a GPS alone had 4% greater fishing power than boats without a GPS. The addition of a plotter raised the power by 7% over boats without the equipment. For each year between the first to third that a fisher has been working with plotters, there is an additional 2 or 3% increase. It appears that when all boats have a GPS and plotter for at least 3 years, the fishing power of the fleet will increase by 12%. Management controls have reduced the efficiency of each boat and lowered the number of days available to fish, but this may not have been sufficient to counteract the increases. Further limits will be needed to maintain the desired levels of mortality.
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47

Wijerathne, A. D. H. T., M. T. T. Ranjan, and U. I. K. Galappaththi. "Guidelines for Manufacturing Waterproof Partition Boards Using the Fibre Reinforced Plastics (FRP) Waste from the Boatbuilding Sector." International Journal of Research and Scientific Innovation 09, no. 09 (2022): 128–34. http://dx.doi.org/10.51244/ijrsi.2022.9911.

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The manufacturing and disposal stages of Fibre Reinforced Plastic (FRP) boats become very significant since they generate environmentally hazardous waste. Although most boat manufacturers have upgraded their facilities to minimize waste, the amount of waste generated is directly proportional to the size of the FRP boats. One option for dealing with the waste generated by the FRP boatbuilding industry is to use FRP recyclate for the production of waterproof partition boards. Under the current research, eleven specific manufacturing guidelines for developing waterproof partition boards using recycled FRP waste were developed. Waterproof partition boards were made from crushed flakes from discarded FRP boats and manufacturing stage waste. The crushed FRP flakes of the disposed of boats and manufacturing stage waste were used as raw materials to produce partition boards, and a mechanical shredding process was employed to produce recyclates. The approximate thicknesses and the aspect ratios of the recyclates used to manufacture partition boards were 0.5–2 mm and 0.04–0.3, respectively.
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48

Huang, Wei, Chang Bing Liu, and Hong Xia Xiong. "Effects of Waves by Boats on Mangrove in Dongzhai Harbor of Hainan." Advanced Materials Research 518-523 (May 2012): 5217–20. http://dx.doi.org/10.4028/www.scientific.net/amr.518-523.5217.

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The effect of boat-generated waves on mangrove forests could be reflected by width change of tidal inlets by using satellite image in this study. Our results showed that the distributions of mangrove zone on the side of tidal inlets were degenerated by boat-generated waves from 2009 to 2011 in Dongzhai Harbor Mangrove Natural Reserve. The main reason of this change was strong erosion of tidal flat caused by the waves generated by high speed and frequencies boats for tourists. To protect the mangrove forests of the tidal inlets, the drive speed and pass frequencies of the boats in waterway should be restricted and decreased.
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49

LEITHAUSER, HAILEY. "BOATS." Yale Review 106, no. 4 (2018): 106–7. http://dx.doi.org/10.1353/tyr.2018.0000.

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50

LEITHAUSER, HAILEY. "BOATS." Yale Review 106, no. 4 (October 2018): 106–7. http://dx.doi.org/10.1111/yrev.13417.

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