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Turkish Journal of Maritime and Marine Sciences
Number of Followers: 0

This is an Open Access Journal

Open Access journal
ISSN (Online) 2564-7016
Published by Ordu Üniversitesi

[2 journals]

Application of combined SWOT and AHP (A’WOT): A case study for maritime
autonomous surface ships
- Authors: Hasan UĞURLU
  Abstract: Increasing operational costs, the growth in ship tonnage, loss of lives, and the human factor in maritime accidents have driven the inevitable emergence of Maritime Autonomous Surface Ships (MASSs) in the world's seas. However, the universal establishment of laws and regulations for autonomous ships is still pending. Moreover, challenges arise due to the scarcity of personnel for immediate response to mitigate the impact of ship accidents and uncertainties linked to the absence of commercial autonomous voyages in international waters. Utilizing SWOT analysis as a strategic management approach enables the identification of strengths and weaknesses in a situation, awareness of related opportunities for leveraging those strengths, examination of threats, and formulation of measures against potential risks. This study encompasses a comprehensive evaluation of the positive and negative aspects of autonomous surface vehicles, encompassing their capabilities, advantages, challenges, and disadvantages. It employs SWOT analysis and the Analytic Hierarchy Process (AHP) method to facilitate strategic planning necessary for the widespread adoption of autonomous ships.
  PubDate: Fri, 01 Dec 2023 00:00:00 +030
First record of Sebastes schlegelii Hilgendorf, 1880, along the Turkish
Black Sea coast – new addition to the alien species inventory
- Authors: Murat BİLECENOĞLU; Mehmet Baki YOKEŞ, Mehmet AYDIN
  Abstract: Sebastes schlegelii is a typical bottom dwelling boreal species, whose native distribution range includes Japan, Korean peninsula and China. This northwest Pacific originated species has recently been recorded from the Crimean and Caucasian coast (northern Black Sea), whose introduction was assumed to be either by balast waters or the acclimatization of Crassostrea gigas (Pacific oyster). On 16 August 2023, a single S.schlegelii specimen with 20.6 cm standard length and 282.1 g in weight was captured off the Ordu coast (southeastern Black Sea), which was previously an unreported fish from the Turkish marine waters. Available information reveals this alien species to be fished regularly, although in small quantities, indicating a presumably established population in the region. The species should be treated as a potentially invasive fish, since it may negatively influence to the local biodiversity through interspecific competition. Close monitoring of its population is strongly suggested.
  PubDate: Fri, 01 Dec 2023 00:00:00 +030
Impact of Tenebrio molitor larvae meal substituted for fish meal in diets
for juvenile Nile tilapia (Oreochromis niloticus): Growth performance and
feed efficiency
- Authors: Seval DERNEKBAŞI; İsmihan KARAYÜCEL
  Abstract: The aim of this study was to evaluate the effects of feeding Nile tilapiya juvenile (Oreochromis niloticus) with diets based on fish meal and Tenebrio molitor (TM) larvae meal on growth performance and feed efficiency. For this purpose, three diets were prepared: Control diet (FM); without T. molitor larvae meal, insect diet (TM); 100% of fish meal has been replaced by T. molitor larvae meal and mixture diet (FM/TM); 50% of fish meal has been replaced by T. molitor larvae meal. A total of three groups in three replications were used over the 46-day investigation. In the experiment, 1-month-old Nile tilapia juveniles were used, which were with an average weight of 0.12±0.001 g. At the end of the experiment, the best growth was in the FM group, then the TM group and the lowest growth was in the FM/TM group (P0.05). SGR was quite low in all groups. The overall feeding response was good and the experimental diets were well accepted by the fish. The best FCR was in the FM group. This was followed by the group fed the TM diet. However, statistically, the difference between them was not significant (P
  PubDate: Fri, 01 Dec 2023 00:00:00 +030
Social and behavioral science trends in maritime studies: Keyword analysis
- Authors: Erdem KAN; Özgür TEZCAN
  Abstract: ABSTRACTIt is known that the maritime industry is intertwined with scientific developments. Considering the number of scientific research and support projects, the relationship between the scientific community and the industry is getting stronger day by day. The research aims to determine the main trend in the articles published between 2011-2022 in the journals published in the field of maritime management and indexed in SSCI. To determine the trend in the field of maritime management, the keywords of 1528 articles published in 3 journals determined according to the limitations were analyzed. As a result of keyword and network analysis, ports, maritime transport, liner shipping, container terminals, and data envelopment analysis-DEA are the most used keywords. The most important result obtained as a result of this study is that the events in the world (war, pandemic, terrorism, piracy, etc.) are in a rapid upward trend in the field of maritime business management and the scientific community has shown a rapid reaction on these issues.Keywords: Maritime research, keyword analysis, social sciences, trends, SSCI
  PubDate: Fri, 01 Dec 2023 00:00:00 +030
Classification of Ship Propeller Types and Energy-Saving Devices Under
Technology Developments
- Authors: Murat BAYRAKTAR; Onur YÜKSEL, Burak GÖKSU
  Abstract: Sevk sistemi ve bileşenlerinin, yeni inşaların veya güçlendirmenin gerçekleştirildiği uygulamalarda deniz taşıtlarının mümkün olduğunca verimli çalışması için kapsamlı bir şekilde analiz edilmesi ve optimize edilmesi gerekir. Çoğu deniz taşıtının ana itme kaynağı olan gemi makinelerinden pervaneye güç aktarımı bileşenindeki dişli kutuları, yataklar ve diğer aktarma ekipmanları çeşitli kayıplara neden olmaktadır. Pervaneye iletilen güç miktarını artırmak için pervane seçimi, gemi tipine, çalışma şekline ve geminin çalışacağı ortama göre hassas bir şekilde yapılmalıdır. Pervane verimliliği, yakıt tüketimi, sağlamlık, güvenilirlik, emisyonlar, titreşim, kavitasyon, karmaşıklık ve maliyetler hem geleneksel pervanelerde hem de en son teknoloji pervane sistemlerinde incelenmektedir. Bu çalışma, küresel aşamada deniz araçlarından elde edilen verimin en kritik olduğu bu dönemde, hangi pervane tipinin hangi gemi tipinde daha verimli olacağını belirlemektedir. Bu sayede bu alanda çalışacak uzmanlar, akademisyenler ve sektör paydaşları için temel bir kaynak oluşturacaktır.
  PubDate: Fri, 01 Dec 2023 00:00:00 +030
Impacts of the Form Design and Operational Factors on the Energy
Consumption of a Solar-Powered Boat: A System Dynamics Approach
- Authors: Burak GÖKSU; Onur YÜKSEL
  Abstract: This research paper aims to design a solar-powered boat and to analyze the effects of environmental and form-related factors on power consumption and battery duration by utilizing a system dynamics approach-based simulation. The boat form is designed as the planing hull and its hull resistance analysis was ensured in Maxsurf package program. PV panels having 548 W power output, and two battery packs with 4660 Wh capacity were placed on the hull body to employ an electrical motor having a 10 kW nominal power output. Two MPPTs were implemented in the system to increase solar system efficiency. The relationships between all system components were modeled in Vensim software to observe battery endurance changes under different conditions. Results demonstrated that the ideal vessel speed is calculated to be around 7 knots with roughly 8 hours of battery duration for the designed boat. 40% state of charge is a critical level for sailing, because 1.63 hours of cruising duration can be provided at 40% level while the speed is kept at 5 m/s (9.72 knots). Indeed, boat’s rising trim angle shorten the battery discharge time, thus navigation by no trim angle is the most effective usage for the vessel.
  PubDate: Fri, 01 Dec 2023 00:00:00 +030

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