Training Ship Research Articles

Analyzing the Current Status and Challenges of Coastal and Inshore Fisheries: A Review of the Impacts and the Legislative Improvements

Jung, B.-K. and Lee, N.-U., 2021. Analyzing the current status and challenges of coastal and inshore fisheries: A review of the impacts and the legislative improvements. In: Lee, J.L.; Suh, K.-S.; Lee, B.; Shin, S., and Lee, J. (eds.), Crisis and Integrated Management for Coastal and Marine Safety. Journal of Coastal Research, Special Issue No. 114, pp. 604–608. Coconut Creek (Florida), ISSN 0749-0208. This study analyzed and reviewed the current status and challenges of coastal and inshore fisheries, which have the greatest impact on the continuous use of fishery resources and the protection and management of the marine ecosystem, and recommended measures to address such challenges. In particular, among the coastal and inshore stationary fishing boats and fisheries in the southern waters of South Korea, the current conditions and problems of gill net and fish trap fishery were analyzed by comparing them with the current fishing regulation system. Using a training ship, the waters where a large amount of fishing work involving coastal and inshore fishing vessels is being done were classified into A, B, and C and the waste fishing gears deposited in such waters were investigated in terms of their trawling means. In addition, the marine debris that was collected was directly identified.Through such practical field surveys and comparative analyses of the relevant information aimed at preventing disputes over fishing in coastal and inshore waters (which have been diverse and continuously occurring) as well as over the creation of waste fishing gears caused by deliberate or environmental factors, and their consequent adverse effects on the fishery resources ecosystem, this study presents a legislative improvement plan that could achieve the sustainable use of fishery resources and thus, promote the growth and development of fisheries in South Korea.

Data-based Study on Chronological Change of Engine Operation Aboard Training Ship KAIGIMARU

Data-based Study on Chronological Change of Engine Operation Aboard Training Ship KAIGIMARU

2.4 MW급 4행정 주기관의 부하에 따른 배기가스 특성 분석 (어로실습선 새바다호를 중심으로)

The engines used as the main engine of a ship vary depending on the fuel, size and output. Most of the ships are currently using internal combustion engines. This study examined the exhaust gas and air pollutants emitted by SAEBADA, the fishing training ship of Gyeongsang National University. It has a 2,427 kW main engine of Nigatta Engineering that uses marine gas oil (MGO) as fuel oil. It was measured in real time for each load. According to this measurement results, the engine of the ship is operated at an optimal load to reduce the emission concentration of air pollutants in the exhaust gas. For two days from May 13th to May 14th, 2020, a real ship emission gas measurement test was conducted on SAEBADA, the fishing training ship of Gyeongsang National University while operating the ship in four modes that were mainly composed of changes in output. The gas phase materials, particulate materials, exhaust temperature, etc., were measured. As a result of the test, the nitrogen oxide (NOx) emission of SAEBADA was Tier II level. It was found that when marine gas oil (MGO) emitted relatively less air pollutants than heavy fuel oil (HFO). In addition, it was found that the nitrogen oxide (NOx) emission in the high-load region was relatively less than in the low-load region regardless of the oil type and the aging of the engine. This may be due to the combustion state. Therefore, we intend to operate SAEBADA in an efficient and eco-friendly with the results of these real ship experiments.

Exergy Analysis of a Plate Type Freshwater Generator Used in Marine Vessels

The freshwater generation from seawater in marine vessels is outlined. Freshwater is a requirement for human consumption as well as for the operation of onboard machinery. As per the World Health Organization (WHO) guidelines, dissolved solids in the drinking water should be less than 500 mg/litre. Technical water (used for the operation of onboard machinery) will contain less than 2.5 mg/litre of boiler feed water. The submerged plate-type evaporator is mainly used on merchant's vessels in order to produce freshwater. An exergy analysis for utilizing waste heat as a source for a single effect desalination process to meet the freshwater needs is proposed with due consideration to practical aspects. A plate-type freshwater generator installed at the Training Ship of Tolani Maritime Institute, Pune, India, is analyzed. Thermal properties are calculated using a "C" program. The practical approach to exergy analysis of the freshwater generating process is to calculate the total exergy loss, which is then compared with the partial exergy losses in the system in order to establish the impact of the specific process on the overall system efficiency. This exergy study calculates the proportion and the distribution of unavailable work in the evaporator, condenser, and brine section of a plate-type freshwater generator. The exergy efficiency in freshwater generators with plate-type freshwater generators is 64%. Since the exergy losses in the freshwater generator are disclosed, the task of effectively directing efforts in performance and energy conservations is simplified.

Analysis of evacuation for fishery training ship HANMIR using SEA-Pro

Analysis of evacuation for fishery training ship HANMIR using SEA-Pro

Shipboard Data Compression Method for Sustainable Real-Time Maritime Communication in Remote Voyage Monitoring of Autonomous Ships

Due to the ever-increasing amount of data collected and the requirements for the rapid and reliable exchange of information across many interconnected communication devices, land-based communications networks are experiencing continuous progress and improvement of existing infrastructures. However, maritime communications are still characterized by slow communication speeds and limited communication capacity, despite a similar trend of increasing demand for information exchange. These limitations are particularly evident in digital data exchange, which is still limited to relatively slow and expensive narrowband satellite transmission. Furthermore, with the increasing digitalization of ships and introducing the sustainable concept of autonomous ship operation, large amounts of collected data need to be transmitted in real-time to enable remote voyage monitoring and control, putting additional pressure on the already strained means of maritime communications. In this paper, an adaptive shipboard data compression method based on differential binary encoding is proposed for real-time maritime data transmission. The proposed approach is verified on the actual data collected on board a training ship equipped with the latest data acquisition system. The obtained results show that the proposed data encoding method efficiently reduces the transmitted data size to an average of 3.4% of the original shipboard data, thus significantly reducing the required data transmission rate. Moreover, the proposed method outperforms several other tested competing methods for shipboard data encoding by up to 69.6% in terms of compression efficiency. Therefore, this study suggests that the proposed data compression approach can be a viable and efficient solution for transmitting large amounts of digital shipboard data in sustainable maritime real-time communications.

The analysing energy efficiency for sailing ships in optimal travel route planning. Case study: World voyage of the training ship "Mircea"

Reducing fuel consumption is a major goal in planning a ship's voyage. In addition to reducing the operational costs of the voyage, this planning objective influences the energy efficiency of the voyage. This study presents a method for identifying the operational energy efficiency in planning a voyage route to sailboats. In this regard, in the first part of the study was developed a method for determining the Energy Efficiency Performance Indicator (EEOI) of a voyage route for sailing ships. In the second part of the study, to validate the developed method, were analyzed two voyage routes, with imposed limitations, to identify the optimal voyage route around the world for the Training ship „Mircea”. The Training ship „Mircea” is a training ship for the students of the "Mircea cel Bătrân" Naval Academy. The analysis was performed for two navigation routes, namely from East to West and from West to East, departing/arriving from the port of Constanța. The results of the analysis indicate that the route from West to East is the optimal route for Mircea's voyage around the world from the perspective of the ship's energy efficiency.

A new identification algorithm for ship model parameters based on sinusoidal function processing innovation

Objectives Due to the few data samples of ship test a, it is difficult to identify ship model parameters quickly and accurately. Methods On the basis of the original least-squaresystem identification algorithm, the innovation is processed by sinusoidal function, and a new method of parameter identification for ship model based on nonlinear sinusoidal function is proposed. Results The Yukun ship, a teaching and training ship of Dalian Maritime University, is taken as an example to carry out the identification experiment, In the case of only 26 sets of test data, the identification effect of the original least square method and improved least square algorithm is compared. The simulation results show that the parameter identification accuracy of the improved algorithm is improved by about 15%, and the effectiveness of the algorithm is verified by using the Yupeng ship. Conclusions This algorithm provides reference of parameter identification of ship model with few data samples.

К вопросу использования цинковых электродов для контроля протекторной защиты судов и кораблей

The article focuses on the importance of organizing the ship operators training, who control the operation of systems protecting the sea vessels from corrosion. There are presented the results of a scientific research - control of the operation of the tread protection system of the steel hull of an auxiliary marine vessel (floating workshop PM-15), which is in a long-term standby mode. The potential difference between the ship's hull and two reference electrodes was measured at a given control point. The control measurements have been carried out using the reference electrodes: silver chloride reference electrode recommended for use by regulatory documents and zinc reference electrodes (not recommended by regulatory documents for sea vessels). There have been made 50 parallel control measurements. The time interval between parallel measurements was 5 seconds. Control measurements were performed within 5 days from 07.02.2020 to 07.14.2020. The accuracy of the control measurements was assessed in accordance with regulatory requirements. It has been stated that both reference electrodes provide high accuracy of control measurements; the results of control carried out with the help of zinc reference electrodes are highly stable. It has been inferred that zinc reference electrodes can be used on Russian ships to control the tread protection of the ship's hull and can be recommended for using by ship crews for training ship operators of ship corrosion protection systems.

練習船における効率的かつ効果的な講義・実習方法の検証－映像講義の実施方法の検証について－

練習船における効率的かつ効果的な講義・実習方法の検証－映像講義の実施方法の検証について－

Sound reception system by an acoustic meta-lens

ABSTRACT Applying the directionality of an acoustic meta-lens, a sound reception system for ships is designed. A two-dimensional disk shape acoustic meta-lens or an acoustic Luneburg lens made of 253 acrylic pipes of different radii which control the refractive index is used. The lens has the diameter of 180 cm and the thickness of 20 cm. Eight microphones were installed around the edges of the lens because the lens focuses the input signal into the edge of the other side of the lens. The sound reception ability of the lens was tested on the sea using the horn of a university training ship as an emitter and the lens loaded on a small boat as a receiver. Both are moving at 20 ~ 40 km/h at a distance between 300 ~ 700 m. The lens could focus to recognize the direction of the input sound in the frequency range between 300 and 900 Hz. ABBREVIATIONS IMO: International Maritime Organization ALL: Acoustic Luneburg Lens SRS: Sound Reception System

The Cadets’ Self-Confidence in Delivering Marine Communication on Board Simulation

The ability to effectively communicate at work, home, and in life is probably one of the most important sets of skills a person needs. English as a tool of communication as standardized by International Maritime Organization (IMO), needs to be implemented in order to improve learning needs, cognitive and affective abilities, for self-confidence is considered to be a significant factor which influences the learners’ language performance. The purpose of this study is to find out the cadets’ level of self-confidence category in delivering marine communication on board and the causes of the level of the self-confidence. The research uses descriptive qualitative design. The participants of the research is deck and engine cadets semester IV from Politeknik Ilmu Pelayaran Makassar who were scheduled for practicing on the training ship. The variable of this study is the cadets’ self-confidence in delivering marine communication on board simulation. The data are collected through questionnaire, observational checklist and interview related to self-confidence of the cadets in delivering marine communication on board Training Ship Sultan Hasanuddin. The data from questionnaires were analyzed by scoring the positive and negative statement into Likert’s scale (strongly agree, agree, undecided, disagree, strongly disagree) and classified the level of sel-confidence by the score scale to determine The High Self-Confidence, Moderate Self-Confidence, and Low Self-Confidence. The results of the study show that there are three levels of cadets’ self-confidence in delivering marine communication on board simulation, they are categorized as high, moderate and low self-confidence. The cadets high self-confidence is caused by the feeling of excited to do simulation. Moderate self-confidence of cadets is caused by high motivation in English, but could not engage the indicators of people with self-confidence. However, Low self-confidence of cadets are caused by mispronunciation and unfamiliarity situation on board.

Analysis of Photovoltaic as Supporting Electric Power Supply on 02 Sultan Hasanuddin Training Vessel

This study aims to analyze the amount of electric power and the profit achieved under the installation of the Photovoltaic array. Solar panel tested was laid on the surface of the Training Ship 02 Sultan Hasanuddin. The technical analysis, namely the calculation of electrical power and economical use of Solar-Powered Electric to support the diesel-powered electric generator as the main source of electrical power. A comparison of power was made by measuring the electric current and voltage variable as well as the financial calculation between the diesel-powered and solar-powered electric generator. The financial calculation was analyzed by using NPV, IRR and PI methods. The results showed that since the power capacity of the Solar Panels was almost similar to the capacity of the Diesel Generator with the output power assumed to be similar, the Solar Panel that supports the Diesel Generator was more profitable than the use of Diesel Generators without supporting solar cells.

Effect of the cross-flow wake on the hydrodynamic performance of the HSP propeller by the CFD solver

This paper numerically presented the effect of the cross-flow wake on the hydrodynamic performance of the ship propeller. The propeller is a typical high skewed propeller (HSP) of the training ship ‘Seiun-Maru’, whose experimental data have been frequently used by many researchers. The viscous flow is solved by an incompressible Reynolds Averaged Navier–Stokes (RANS) method using Ansys-CFX solver. The shear stress transport (SST) k–ω turbulence model is employed for the simulation of the propeller in a fully turbulent flow. The thrust and torque coefficients at 10 presented advance coefficients (between 0.1 and 1) showed good agreement comparing with experimental data. The numerical results are increased in the wake flows. The unsteady oscillating load of thrust and torque is presented and discussed for one blade and whole blades during one cycle at different cross-flow wakes and at advance coefficient (J = 0.85). Based on the numerical results, when the cross-flow wake is increased by 20% and 50%, the thrust at J = 0.85 are increased about 2.03% and 4.71% respectively and the torque at J = 0.85 is increased about 1.04% and 2.69%, respectively. Moreover, pressure distribution and streamlines are also presented and discussed.

Evaluation of noise level in the training ship, Saehaerim

Evaluation of noise level in the training ship, Saehaerim

Z-test에 의한 실습선 새동백호 조종성능

It is necessary for navigator to understand sufficiently maneuverabilities based on experiences and the data which were gotten from several tests of the ship when he maneuver his vessel. By the way most navigators used to rely on his experiences or feelings only maneuvering ship. But he is faced with an unexpected difficulties when he encounters situations he had not experienced. So navigator must get both experiences and data based on experimental results. In this paper author performs several tests such as turning test, Zig-zag test and spiral test to provide informations of maneuverabilities for navigators. In this paper, the author performed “Z” test in order to study the maneuverability of M/S Sae Dong Baek, training ship of the Chonnam National University. The obtained results are as follows: As the “Z” test the turning index(K)’s results of Sae Dong Baek are 0.246, 0.173 and 0.299, 0.134 respectively when the rudder indicator changes to port 10°, 20° and starboard 10°, 20°. Also as the “Z” test the following index(T)’s results are 15.859, 20.37 and 29.937, 21.6 respectively when the rudder indicator changes to port 10°, 20° and starboard 10°, 20°.

CFD Investigation into Seakeeping Performance of a Training Ship

The numerous ship accidents at sea have usually resulted in tremendous loss and casualties. To prevent such disastrous accidents, a comprehensive investigation into reliable prediction of seakeeping performance of a ship is necessarily required. This paper presents computational fluid dynamics (CFD) analysis on seakeeping performance of a training ship (full scale model) quantified through a Response of Amplitude Operators (RAO) for heave and pitch motions. The effects of wavelengths, wave directions and ship forward velocities have been accordingly taken into account. In general, the results revealed that the shorter wavelengths (l/L ? 1.0) have insignificant effect to the heave and pitch motions performance of the training ship, which means that the ship has good seakeeping behavior. However, the further increase of wavelength was proportional with the increase of RAO for her heave and pitch motions; whilst it may lead to degrade her seakeeping quality. In addition, the vertical motions behavior in the following-seas dealt with higher RAO as compared with case of the head-seas condition. Similarly, the subsequent increase of the ship forward velocity was prone to relatively increase of the RAO for her heave and pitch motions especially at l/L ? 2.0. It was merely concluded that this seakeeping prediction using CFD approach provides useful outcomes in the preliminary design stage for safety assessment of the training ship navigation during sailing.

複数校1隻体制による練習船教育に関する考察（III） 船舶管理体制に関する考察

複数校1隻体制による練習船教育に関する考察（III） 船舶管理体制に関する考察

The design of the ship’s fuel estimation simulator uses a case study of the bung tomo trainer ship

The calculation of ship operating costs is a major element in determining tariffs. The determination of high or low tariff is very important in the shipping business. In other words, determining the proper ship operating costs is the key to the success of the shipping business. There are several components in determining the operational costs of a ship, one of which is the calculation of fuel needed to cover a certain distance. Usually for new routes, the calculation uses the formula specified by the Minister of Transportation No. KM. 58 of 2003. However, this manual calculation requires a lot of time and human error factors will result in inaccurate calculation results. So, we need a more effective and efficient way to calculate the amount of fuel needed to cover a certain distance. In this study, a simulator was developed that uses the concept of a spherical triangle to determine the distance and direction of a ship and then integrates it with the formula of the Minister of Transportation to get the results of the fuel calculation. From the results of 2 trials using the Bung Tomo Training Ship, the calculation results were faster and more accurate. Even more, the simulator users can simply click two points as the beginning and end of the ship’s journey. Thus, the simulator can simplify the process of calculating ship operating costs, especially the determination of new routes in the shipping business.

1st Report on the Basic Performance Verification by the Actual Sea Model Tests for the Higher Holding Performance New Type Anchor Development

Authors are studying and developing the higher holding performance new type anchor to prevent the marine accident due to the dragging anchor. The purpose of this research is to indicate the usefulness and applicability of our higher holding performance new type anchor in actual sea area. For that purpose, the actual sea model tests were carried out in September and November 2019. Shioji-maru, the training ship belonging to the TUMSAT, was used for the actual sea model tests. The actual sea model tests were carried in Tateyama Bay and Off Tokyo Bay Urayasu. The dragging tests were carried out in the actual sea areas and, the basic holding performance of the new type model anchor was verified. In this paper, it is considered the holding resistance, the holding resistance coefficient, and stability. From this consideration, it was revealed that the new type anchor has the possibility and usefulness as the higher performance new type anchor of the next generation. In addition, the issues for practical use were shown.