Motor Boat Research Articles

Determinants of Catch And Catch Per Unit Effort Of Motorboat And Outboard Motorboat Fishers In Bulukumba Regency

Motor and outboard boats are the main means by which fishersmen exploit the fisheries resources in these waters. The success of the catch and the efficiency of the fishermen's efforts are strongly influenced by various factors related to the characteristics of the boat, the fishing gear and the condition of the aquatic environment. This study aims to analyse the determinants of catch and catch per unit effort of motorboat and outboard motorboat fishers in bulukumba regency. Data collection techniques used were observation, interview and documentation. The number of samples was 81 modern fishermen (juragan fishermen) of motorboats out of 407 population using the Slovin formula method and 81 outboard motorboat fishermen out of 81 population using the area proportional random sampling method. Data analysis techniques used are statistical tests, classical assumptions tests using SPSS 25 and CPUE analysis. The study found that the length of fishing (X1), volume of diesel (X2), age of fishermen (X4), and fishing experience (X6) had a positive impact on the production of motorboat fishermen's catch (Y1) when examined independently. On the other hand, the number of labour (X3) and formal education of fishermen (X5) were negatively correlated with catch production. The duration of sea time (X7) and the power of the outboard engine (X8) have a positive impact, whereas the volume of petrol (X9), age of fishermen (X10), formal education of fishermen (X11), sea experience (X12), and number of fishing gear used (X13) have a negative impact on the catch rate of outboard motorboat fishermen (Y2). Based on the CPUE (Catch per Unit Effort) value, there has been a fluctuation of motorboat and outboard motorboat fishermen from 2017 to 2021. The average value per year, from 2017 to 2021, was 389.9914kg/trip for motorboat fishermen and 46.66028kg/trip for outboard motorboats. It is recommended to increase the number of fishing gear, particularly trawl gear, and transportation facilities in fishing. Fishers should be incentivised to utilise fishing equipment that is appropriate for the specific kind of fish and local aquatic environments in order to enhance catches and reduce negative impacts on fishing resources.

Development of Solar Powered Boat for Maximum Energy Efficiency

The present paper shown a work in research and development of a small solar boat design, this work has been developed in Anast/ULG-Belgium as reference for Post-graduate degree in Naval Architecture. The development of a methodology of simple calculation, step by step, for solar boat is shown here, taking in account the use of clean energy, minimum weight of the boat and minimum price of fabrication, for this has been considerate: boat weight; sheet specification; material utilized; appropriate propulsion; necessary quantity of solar panels; quantity of batteries; adequate engine; until to the final commercial price. The Nautilus is a solar powered pleasure boat and basically designed for day-and weekend-trips.

Development of service infrastructure for private motor boats in the northern regions

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.

Comparative Analysis of Conventional and Electric Motor Propulsion Systems for “Sandek” Fishing Boats in West Sulawesi from a Sustainable Economical Aspect

Indonesia as a tropical country has abundant potential of solar energy. The Indonesian government is very serious about implementing efforts towards net zero emissions which are continuously encouraged. Using solar energy is one of the solutions to reduce greenhouse gas emissions use of fossil fuels. One of the efforts made is to apply technology to replace the propulsion system of ships powered by fossil fuel engines to electricity from solar energy. This research takes the case of a conventional engine-powered “Sandek” fishing boat converted to a solar-powered electric motor in West Sulawesi. The aim is to compare the level of profit and return on investment before and after conventional motor ships are replaced with electric powered ships. The research method used is a descriptive method with investment parameters including NPV, IRR, and Payback Period. The results hopefully can be used as a reference for investment who will develop the transition from conventional motor boats to electric boats. The conclusions of this research can be used as a model for the sustainable use of electric fishing boats in Indonesia.

Occupational Noise Induced Hearing Loss in Motor Boat Fisherman

Introduction: Noise Induced Hearing Loss is a person's hearing loss either partially or completely which is permanent and can affect one or both ears caused by continuous exposure to noise in the work environment. One of the causes of Noise Induced Hearing Loss (NIHL) is working as a motorboat fisherman.
 Content: NIHL can arise as a result of the interaction between genetic factors and environmental factors with the role of internal and external risk factors. The diagnosis of NIHL can be established through history taking, physical examination such as otoscopy and tuning fork tests, as well as supporting examinations in the form of pure tone audiometry.
 Conclusion: NIHL will produce the impression of sensorineural deafness with a permanent nature so that the only treatment that can be given is supportive and preventive management.
 Keywords: Noisy; noise-induced hearing loss; motorboat fisherman

Sustainability and Resilience of Indigenous Siberian Communities under the Impact of Transportation Infrastructure Transformation

Transport provision in remote territories is one of the most important factors in maintaining the sustainability of socio-economic and ecological systems. Indigenous peoples of Siberia have always been mobile using diverse traditional ways across the taiga. During the Soviet period, the transition to settled life, along with technological development and the emergence of new modes of transport, such as off-road cars, snowmobiles, and motor boats, significantly affected the level of population mobility, including remote areas where people are engaged in traditional nature management. With the collapse of the Soviet Union, there were significant changes and reductions in the subsidies of transportation systems for remote terrains that made them isolated. Transport connectivity has been realized through rare plane flights (once a month or less) or by cars on dirt roads (actually off-road) that take several days of travel. Siberian territories rich with natural resources, low population density, and weak infrastructure might be attractive for mining companies. Being difficult to access not only for the local population, but also for industrial companies, the territories imply the allocation of a significant share of road construction and transport costs in the cost items of miners and processors. The problems of sustainability and resilience of the indigenous peoples of Siberia require special attention when restructuring transport communications, but they have practically not been studied before. Methods of in-depth and group interviews with local residents were used. Based on comparative geographic and statistical analysis and generalization of data, network and problem approaches applied for various sources and field materials (including in-depth and group interviews), the factors of sustainability and resilience, which the indigenous communities of three remote Siberian territories pin their hopes on in the context of the transformation of transportation infrastructure, have been identified. If geographic remoteness remains an unchanged fact, the expansion of desired transport accessibility (mainly due to investments by industrial companies) is associated by locals with the possibility of additional income related to provision of services, the emergence of new types of employment of the population that have not been observed before, and the implementation of new transport modes to support traditional activities.

Experimental studies of a midwater trawl 18/95 m in the Vishtynets Lake

The article presents the first experimental data on the operation of a mid-depth trawl 18/95 m for catching vendace (Coregonus albula) in Lake Vishtynets, Kaliningrad Region. Lake Vishtynets is a testing ground for the study of industrial fishing gear. The trawl was towed taking into account the capacities of two interconnected (in a catamaran) motor boats: «Wellboat» (motor with a capacity of 25 l / s or 18,3 kW). When designing a mid-depth trawl 18/95 m, data from experiments with a floating anchor and software «Computer-aided design system for industrial fishing gear (CAD-OR)» were used. The technical characteristics of the 18/95 m trawl project were obtained. These experiments were carried out on the basis of previous studies in the Fishering Service hydrochannel.

Influence of sanctuary disturbance, weather, and landscape characteristics on waterfowl harvest opportunity in western Tennessee

AbstractThe North American Waterfowl Management Plan (NAWMP) recognizes waterfowl hunters and non‐consumptive users as important stakeholders to sustain waterfowl populations through economic and political support for habitat conservation initiatives. Opportunities to shoot at and harvest ducks are key determinants of achievement‐oriented hunt satisfaction and quality. Therefore, identifying factors influencing harvest opportunity would help hunters and wildlife managers identify optimal days afield and promote hunter recruitment, retention, and reactivation (R3) efforts in support of NAWMP. Waterfowl extensively use spatial sanctuaries during hunting seasons, especially diurnally, which could limit their perceived availability to hunters. Thus, a possible management action to support R3 is allowing limited public access on sanctuaries, which could offer diverse recreational opportunities for non‐consumptive users and potentially increase harvest opportunities for hunters in traditional hunting areas if the limited disturbance caused waterfowl to leave sanctuaries. Therefore, we evaluated to what extent experimental sanctuary disturbance, landscape characteristics, and weather influenced local harvest opportunities. We conducted disturbance treatments including travel by a covered truck (i.e., truck with enclosed cab), a pedestrian on foot, and an uncovered vehicle (e.g., motor boat or all‐terrain vehicle [ATV]). To measure harvest opportunity, we used autonomous recording units (ARU) to enumerate daily shotgun volleys at a landscape‐scale across western Tennessee, USA, during 2019–2021 waterfowl hunting seasons. We identified 339,391 distinct shotgun volleys ( = 73 shotgun volleys/day/ARU). Shotgun volleys decreased 50% within 2 weeks of opening day and did not notably increase for the remainder of the hunting season. Contrary to our predictions, sanctuary disturbance decreased harvest opportunity. Specifically, the pedestrian disturbance and covered vehicle disturbance decreased daily shotgun volleys by 32% and 31%, respectively. Additionally, harvest opportunity decreased 20% with every 5‐km increase in distance from a sanctuary. Harvest opportunity increased 2% for every 1°C decrease from mean low temperatures and 9% with every 10‐hPa increase in barometric pressure from the previous day. Conversely, harvest opportunity was unaffected by changes in cloud cover, daily precipitation, waterfowl abundance, or surface water inundation. Our results suggest disturbing sanctuaries decreases harvest opportunity and, in turn, may reduce hunt quality and satisfaction. If increasing harvest opportunity is a primary management objective, we recommend limiting sanctuary disturbance to maximize local harvest opportunities. Furthermore, greater harvest opportunity nearer sanctuaries indicates that additional disturbance‐free areas may increase local harvest opportunities and hunter satisfaction.

Analysis of the Potential of Fishermen's Communities in Increasing Income In Payangan, Sumberejo Village, Ambulu District, Jember Regency

Seeing the importance of the role of industry in influencing economic growth, Sukirno (2006) revealed that in order for developing countries to escape the cycle of poverty they face, it is necessary to carry out a balanced development program, namely at the same time investment is carried out in various industries that have linkages. In this way the market area can be enlarged, because the employment opportunities and people's income obtained by various industries will create demand for goods produced by several industries that are built. Industrial development will create a market for the developed industry. So in the development of the economy in this modern era, industry has a very important role in the industrial sector. Marine products, especially fish, are potential raw materials as a source of nutrients, especially protein and fat. Processing of marine products can help fishermen to increase added value, compared to selling them in fresh form. Types of processed seafood using simple labor and relatively low capital are dried fish, salted fish, pindang fish, meatballs and fish crackers (Hotman, 2008: 49). Increased production and good results depend on production factors that affect fish production. The sea as the main production factor, in addition to other production factors such as motor boats, fishing gear and so on, greatly influences fish production for fishermen. than when sold in fresh form. Types of processed seafood using simple labor and relatively low capital are dried fish, salted fish, pindang fish, meatballs and fish crackers (Hotman, 2008: 49). Increased production and good results depend on production factors that affect fish production. The sea as the main production factor, in addition to other production factors such as motor boats, fishing gear and so on, greatly influences fish production for fishermen. than when sold in fresh form. Types of processed seafood using simple labor and relatively low capital are dried fish, salted fish, pindang fish, meatballs and fish crackers (Hotman, 2008: 49). Increased production and good results depend on production factors that affect fish production. The sea as the main production factor, in addition to other production factors such as motor boats, fishing gear and so on, greatly influences fish production for fishermen.

The Perspective of Fuel Cell High‐Speed Powerboats

This work compares different propulsion systems to propel a class‐1 power boat: a very large battery plus electric motor; a fuel tank, fuel cell, and small battery plus electric motor; a conventional fuel tank and internal combustion engine. A fuel tank and internal combustion engine propulsion system deliver the largest mechanical energy at the sterndrive per unit mass of the propulsion system at 4.30 MJ kg−1 of propulsion system with hydrocarbon fuels and 4.30 to 4.74 MJ kg−1 with hydrogen fuel. A fuel tank, fuel cell, battery, and electric motor propulsion system deliver the second‐best sterndrive mechanical energy density at 0.75 MJ kg−1 of the propulsion system. This is almost 2.5 times the value of the sterndrive mechanical energy density of a very large battery and electric motor propulsion system which is last at 0.30 MJ kg−1 of the propulsion system. Preferring electric propulsion to conventional mechanical propulsion, further optimization of the fuel tank, fuel cell, and the small battery may be carried out targeting the sought trade‐off between range and performance, short‐term and continuous.

Motor Boats in the Technology of HDPE with RIB Type Construction

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

Heavy metals in the bottom sediments of the Sasyk estuary

Purpose. The main aim of research is to study the bottom sediments of the Sasyk estuary, in particular, to establish their lithological characteristics and the peculiarities of the distribution of heavy metals in their layers. Method. The research was done with the results of the expedition work carried out in 2018-2019, 31 samples of the bottom sediments of the Sasyk estuary, channels and paleochannels of the Kogylnyk and Sarata rivers, and rocks of the shoreline of the studied reservoir were selected. We carried out sampling along the network of 31 stations from a motor boat using a bottom-grab and orientation by GPS navigation. The content of heavy metals was determined using geochemical spectral emission analysis. Statistical and cartographic processing of the research results was carried out using geographic information systems Mapinfo, QGIS, Global Mapper and Surfer. Also, to establish the possible routes of metal migration, we used the analysis of mesotopolineaments formed according to the NASA SRTM digital terrain model, with the construction of rose diagrams of the main directions of the lineaments. The results. We established that the bottom sediments were represented mainly by grey-black, black, viscous silt, often with an admixture of shell detritus. Less often, they were composed of sand, sometimes muddy with abundant fauna. We also determined the content of heavy metals in the system of bottom sediments, features of their distribution and possible ways of infusing. Thus, in the territory of the Sasyk estuary, heavy metals of the first (Pb), second (Ni, Cu, Cr, Mo) and third (V, Mn, Ba) hazard class are found in high concentrations. The average content of Pb for the bottom sediment system of the estuary is: for sand – 32 mg/kg, for silt – 41 mg/kg. The maximum content for both is 100 mg/kg. The average Ni content is: for sand – 27 mg/kg, for silt – 62 mg/kg. The maximum content for sand is 80 mg/kg, for silt – 100 mg/kg. The average Cu content in the silt of the Sasyk estuary is 81 mg/kg, and 26 mg/kg in the sand. An elevated content of Mn, Ba and Mo was also found in several samples. Оften areas with increased concentrations of metals have a point character. In almost all cases, they are connected to the river systems adjacent to the pond. The distribution of some metals is correlated with the main directions of estuary water circulation. Wastewater is a likely sources of metals entering the estuary geoecosystem. We also assume that the migration of these elements to the pond may occur through tectonic blocks. Scientific novelty. For the first time in recent years, we have carried out expeditionary work on research of the bottom sediments of the Sasyk estuary, along the complete network of the station. We obtained the data on the gross content of heavy metals, and determined their average, maximum and minimum concentrations. For the first time, maps of the spatial distribution of metals were constructed, which made it possible to establish the main regularities of their accumulation in the bottom sediment system of the pond. Practical significance. Pollution of the bottom sediments of the Sasyk estuary with heavy metals is one of the components of today's critical ecological state of the pond, which affects the well-being of the residents of the surrounding areas. The obtained results can be used at the state level to create effective programs for quality management of the resource potential of the estuary.

Analysis of Brand Awareness and Brand Image Strategies on Lake Toba Tourists' Interest through the F1H20 Power Boat Digital Marketing Strategy in Balige, North Tapanuli

The main objective of this study is to analyze the effect of brand awareness and brand image on the interest of Lake Toba tourists through digital marketing strategies. The approach used in this research is associative and quantitative, using path analysis. The population and sample of this study were micro, small, and medium enterprises around the location of the Lake Toba Powerboat F1H20 event in Sibola Hotang Village, Balige District, Samosir Regency, North Sumatra Province, totaling 93 people. The sampling technique used is quota sampling. The sample size in this study consisted of 93 respondents. The results showed that the effect of brand awareness on visitor interest had an original sample size of 0.550, P-Value 0.000 < P-Table 0.05, and T-value 4.374 > T-Table 1.196. The effect of brand image on visitor interest has an original sample size of 0.507, a P-value of 0.036, a P-table of 0.05, and a T-value of 3.666. T-Table 1.196. The effect of brand awareness through digital marketing on visitor interest has an original sample of 0.235 with a P-Value of 0.040 < P-Table 0.05 and a T-value of 2.051 > T-Table 1.196. The influence of brand image through digital marketing on visitor interest has an original sample of 0.435 with a P-Value of 0.040 (P-Table 0.05) and a T-Value of 3.051. T-Table 1.196. Finally, the effect of digital marketing on visitor interest has an original sample size of 0.435, a P-Value of 0.040, a P-table of 0.05, and a T-value of 3.051. T-Table 1.196.

Маломерные суда: спектр их использования и проблемы

Using small boats is not limited to using them as watercrafts for amateur or recreational fishing, as well as an auxiliary fleet of the large-tonnage vessels. Motor boats as a means of performing the main production functions are widely used by the different industrial enterprises, whose activities are related to the operation in inland waterways and other water areas. The Astrakhan region, among other regions with inland waterways, has a large network 
 of branched canals, some of which are located in shallow waters with dense reeds, impassible for the ships with 
 a large draft transferring personnel, cargo and equipment. High speed developed by the small boats in gliding makes it possible to use them in the border service, fish protection service, in transporting passengers, etc. At the same time, the disadvantages of using small vessels are considered, namely, a much lower level of comfort compared to the large vessels, noise and vibrations from the outboard motor, the impact of emissions on the environment. Staying of the navigator in close proximity to the engine, the prolonged exposure to the negative impact of the environment (high and low temperatures, wind, precipitation) increase the fatigue of the human body. Conclusions are drawn about the need to reduce negative factors, creating more comfortable working conditions for the staff. Due to the lack of freely available information on the positive and negative aspects of using a small fleet, the experience of using motor boats with outboard motors is listed and described.

Vehicle Load Capacity Analysis Above KMP. Swarna Kartika on Balikpapan – Palu Track

Kariangau Ferry Port which is managed and supervised by the Land Transportation Management Agency (BPTD) Region XVII of East Kalimantan and North Kalimantan Provinces serves 3 tracks, namely Kariangau - Penajam, Balikpapan - Palu, and Balikpapan - Mamuju. The Balikpapan – Palu track is 213 miles served by the Swarna Kartika Crossing Motor Boat (KMP. Swarna Kartika) operated by PT. Jembatan Nusantara with travel time ±20 hours. The distance traveled which takes a long time, it is necessary to pay attention to the security and safety conditions of the vehicles on board the ship. Currently, the arrangement and handling of vehicle loads on board the ship is still careless and positioned at a very close distance without rope safety (lashing) so that it is very dangerous for ship operators and vehicles on board. The method used to analyze existing problems is the analysis of the calculation of the load capacity of vehicles per group based on the Production Unit (SUP) in the Regulation of the Minister of Transportation Number 66 of 2019 concerning the Mechanism for Determining and Formulating the Calculation of Crossing Transportation Tariffs. Based on the results of the analysis, it was concluded that the average load factor of loading and unloading vehicles is very high, namely 139.49%. The ideal number of vehicle capacities on board KMP.Swarna Kartika is not yet suitable based on the Production Unit (SUP), where the SUP available vessels is smaller than the capacity of the used SUP. So that from this calculation, it is planned to arrange vehicles per group on the ship to match the SUP capacity available for the ship.

Ecology of Endemic Primate Proboscis Monkeys at Curiak Island Area, South Kalimantan, Indonesia

The proboscis monkey is an endemic primate of Borneo with an endangered conservation status. Proboscis monkey conservation must be carried out immediately, considering its existence as a biological indicator to maintain the balance of the wetland ecosystem. Proboscis monkey habitat which is outside the conservation area is very prone to changing functions, while the distribution of the proboscis monkey population is more outside the conservation area. The research aims to identify the ecology of proboscis monkeys that are outside the conservation area, namely the Curiak Island area in South Kalimantan. Retrieval of proboscis monkey ecological data for 6 months includes population, daily activities, and home range. The population method uses direct surveys by exploring the area using motor boats in the morning and evening. The daily activity method is the Scan Sampling Method and Ad liebetum Sampling. The home range method is recorded by tracking using a drone, the type of data recorded includes the total distance of daily movement which is calculated from the wake up time to sleep time. The results showed that the proboscis monkey population has the potential to develop with a distribution of 30 individuals divided into 3 groups, proboscis monkeys' daily activities include eating (33.5%), moving (11.63%), resting (41.56%), and social ( 13.28%). The average home range of proboscis monkeys is 86.25 m with a range of 49 m - 136 m

Effects of Outdoor Recreation Participation and Interpretation

We conducted a field experiment in Thailand to evaluate effects of appreciative and mechanized forms of recreation and interpretation on environmental concerns of park visitors. Research participants were randomly assigned to one of eight ex-perimental conditions defined by recreation type (appreciative vs. mechanized), recreation activity (birdwatching, nature photography, motorcycling, and motor boating) nested within recreation type, and interpretation (interpretation provid-ed vs. not provided). We measured three dimensions of environmental concern: specific environmental concern (SEC), worldwide environmental concern (WEC), and general environmental behavior (GEB). Appreciative activity participants and participants who received interpretation had significantly higher SEC scores than those who participated in mechanized activities and those who did not receive interpretation. Interpretation experiences elevated WEC and GEB, with the effect being more substantial among participants who participated in mechanized rec-reation activities.

Formulation of Fuel Oil Consumption Estimation on The Fishing Vessels Through The Gill Net and Bubu Fishing Gears for Evaluating Fuel Subsidies in Bintan Regency - Indonesia

The largest percentage of expenditure in fishing operations using motor boats is Fuel Oil (BBM) which amounts to 40-50% of total operating costs. Inorder to ensure the smoothness and accuracy of the distribution of subsidized fuel for fisheries businesses, the Ministry of Marine Affairs and Fisheries issued Ministerial Regulation KP No.13 of 2015 concerning guidelines for the implementation of the issuance of recommendation letters for the purchase of certain types of fuel oil for capture fisheries businesses. In this study, an evaluation of the formulation was carried out to determine the estimated consumption of fuel subsidies on fishing vessels measuring 10-30 GT with Gill Net and Bubu fishing gear in Bintan Regency. In the calculation process, the estimated fuel consumption for fishing vessels must consider several aspects, namely the type of fishing gear, the distance to the fishing location, the power on the main and auxiliary engines, as well as the fuel coefficient and specific gravity used. Therefore, it is necessary to estimate fuel consumption by calculating the operating mode on each type of fishing gear. This is intended as an effort to provide a more precise estimate of fuel consumption.The method used in determining fuel estimates is with two different scenarios. In scenario I, the calculation of fuel consumption uses the formulation of Permen-KP No. 13 of 2015, with the formula used in the main engine is the power of the main engine, namely the Cfo and the duration of the capture operation per trip, while for the estimated measurement of the consumption of auxiliary machines, it is calculated 20% of the estimated fuel of the main engine. On the other hand, based on scenario II, the formulation of fuel consumption estimates still uses the formulation of Permen-KP No. 13 of 2015, but the evaluation is carried out by adding calculations of the catch operation time according to the type of Gill Net or Bubu fishing gear, the distance to the capture location, and the power of the auxiliary machine used. The results of this study found that there were differences in fuel consumption in the two types of fishing gear in each scenario. In scenario II, a ship using Gill Net fishing gear requires a greater fuel consumption of 44% thana ship with Bubu fishing gear. In addition, scenario II recommends adding 43% fuel for Gill Net ships and adding 39% fuel for Bubu ships. With this scenario II modeling, theproduction contribution obtained during the application of scenario II increased by 15% on the Gill net fishing gear and 17% on the Bubu fishing gear.

38ft급 HDPE 파워보트 구조해석을 통한 선급별 하중 기준에 대한 비교 고찰

According to the government policy of environmental regulations, interest of ship, which made with High-Density Polyethylene (HDPE) as a low-carbon and eco-friendly material, is growing as a substitute for the existing fishery boat hull materials such as FRP, aluminum, steel etc. However, regulations related to the production of HDPE ship are still quite incomplete. Even there are no regulations related to structural analysis. Therefore, in this study, structural analysis is carried out by applying different design loads for each international classification for 38ft class HDPE power boats, and the results are compared and analyzed. According to this study, although there is a correlation between the based pressure value and the analysis result value of each class regulation, it is not necessarily proportional. Also, This analysis result shows a difference not only depending on the size of design load, but also application range of the load, the pressure adjustment factor and section shape. However, the occurrence point and trend of the maximum stress values were quite consistent. It is hoped that the results of this study will be used when establishing HDPE ship structure analysis procedures and standards in the future.

Downstream migration of Burbot Larvae (Lota lota) in the section of the Irtysh River

In this work, a study was made of the downstream migration of burbot larvae. To carry out the control catch, the larvae were trawled during the spring flood using a small motor boat. As a result of the work, it was found that the main factor affecting the number of larvae in the watercourse is the water temperature factor. Statistical analysis showed that more than 40% of the factors influencing the runoff of burbot larvae in the studied section of the river were taken into account. A mathematical model is proposed that reflects the dynamics of the number of larvae depending on the water temperature. It was shown that during the study period, with an increase in the level and temperature of the water, as well as the speed of the current, the number of larvae decreased from 0.7 to 0.005 ind./m3. The body length of the larva in the control catches ranged from 2.98 to 4.71 mm. Control fishing was carried out immediately after the river was opened from ice, the duration of the period during which migration continued was 10 days. Larvae were not recorded in trawl catches when the water temperature reached 6.53 ¼.