Seyir planlamasý, yakýt tüketimi, zaman ve emniyet faktörleri açýsýndan önem arz etmektedir. Uygun rotanýn belirlenmesi, birçok kriterin ayný anda gözden geçirilmesini gerektirdiði için gemi yönetiminde uzmanlýk gerektiren konulardan biridir. Bu çalýþmanýn amacý, bulanýk analitik hiyerarþi süreci (BAHS) ile geniþletilmiþ Dijsktra algoritmasý geliþtirmek ve deniz çevresinde en öncelikli rotalama problemini araþtýrmaktýr. Literatürde Dijsktra algoritmasý ile ilgili birçok çalýþma bulunmaktadýr fakat bu çalýþmalar çoklu karar vericiler, karar matrislerinin tutarlýlýk kontrolü ve fayda ya da masraf þeklinde olabilecek çoklu kriterlerden yoksundur. Bu modelde, öznel yargýlamalar ve kiþisel tecrübeler karar verme sürecine doðrudan dahil olmaktadýr. Amaçlanan BAHS ile geniþletilmiþ Dijsktra algoritmasý (bundan sonra BAHS-Dijsktra), belirsiz kýstaslarý ele alma yeteneklerini, bulanýklýðýn varlýðýnda geliþtirmektedir. Bu çalýþma, insanlý yada insansýz gemilere yeni bir rota optimizasyon algoritmasý sunarak yakýt tüketimi, zaman ve emniyet faydasý saðlanmasý amaçlanmýþtýr.

To maximize safety at sea, modelling of risk factors and use of risk based design tools is significant. Effective risk modelling techniques and decision-making tools need to be developed and applied to increase safety and meet customer demands.
In this study, the operational risks of an existing ambulance boat were examined and the existing boat was redesigned as a risk-based approach. Failure Mode and Effects Analysis (FMEA) was used and risk priority numbers (RPNs) were calculated in the risk assessment and redesign. The results obtained from the study will contribute to improving the safety of ambulance boats and preventing or mitigating of potential risks.

In this study, 2-D wave making characteristics of a submerged hydrofoil has been investigated in a numerical fashion. Experimental data available for different depths of submergence and flow velocities have been compared to the results obtained by a commercial RANS CFD code and an in-house SPH code. The capabilities of the numerical approaches in terms of capturing the free surface deformation have been assessed. At high Froude numbers, the induced wave profiles have been observed to exhibit an unsteady nature by both numerical methods.
The pressure contours obtained from the numerical analysis have also been compared with each other. It has been seen that the agreement between the results of the well-established RANS method and recently progressing SPH technique is encouraging for further development.

Energy is the ability to do work of the systems. Exergy is defined as the availability of energy or the maximum work to be done. In this study, energy, exergy and waste heat analyses of a turbo charged marine diesel generator is conducted for the loads of 25%, 50%, 75% and 100%. As a result of energy and exergy analysis, the first and second law efficiencies of a engine at 25%, 50%, 75% and 100% load conditions are calculated as 34.29%, 39.69%, 42.01%, 42.49% and 38.36%, 44.38%, 46.8% and 47.04%, respectively. The maximum shaft power values are 744.1 kW and 1058.2 kW for 50% and 75% loads, respectively. Considering the exergy values which means the available energy, the highest potentials are found as 55.7 kW at maximum load in the exhaust gases and 160.9 kW at maximum load in the cooling water. The exergy values that can be recovered from the surrounding and lubricating oil are big enough not to be neglected.

The increasing importance of marketing services has led services industries to pursue ways of providing better services and improve customer satisfaction in a competitive marketplace. Knowing what can be promoted and what customers consider in choosing the service provider are important factors in a strategic marketing plan. Recognizing core competences with customer expectations and perceptions is undoubtedly the best tool for success. While services marketing has been studied for many services industries, logistics, particularly customs services, is rarely addressed. Exploiting services quality and perception scales, this qualitative study applied content analysis to semi-structured interviews to explore the marketing criteria of customs service providers from a dyadic perspective within business-to-business (B2B) services. Marketing criteria for customs services were categorized as company, personnel and service-oriented. Three genuine dimensions were created in accordance with their relevance to the service provider company, employees working in the service provider company and the service itself. The results reveal that customs services marketing criteria taken into consideration by customers for service provider choice can be different when compared to other services within B2B environment. This study contributes to services marketing regarding customs services by comparing the factors of logistics services quality and perception literature.

The trade with its contribution to Turkish maritime industry, named as coaster transportation, operated by near coastal voyages by means of low-tonnaged ships (1000-12000 DWT), has been both the backbone of Turkish maritime industry and the first step in owning bigger sized ships which is an upper level in the industry. Third party ship management is a service which has been used more often recently by all types and scales of companies to take competitive advantage in steadily changing and improving maritime industry. This study has been held by correlational research method which is a survey research model, for the purpose of identifying if there is a statistically significant difference between the ships fully managed by third party ship management companies and fully in-house managed ships by using BIMCO’s Key Performance Indicator Standards V3.0. One way Anova (one way variation test) is used in analysing and evaluating the SPI values to to find out if there is a statistically significant difference among companies. At the end of the study, it is found that there is a statistically significant difference between the performances of two different ways managed ships.

Human resources, which is one of the fundamental elements in the organization, is among the most effective and important sources that bring the organizations to their goals. Therefore, good management of human resources is a prerequisite for the success of organizations. Therefore, understanding and managing the attitudes and behaviors of employees towards their organizations and businesses is considered an important phenomenon. The aim of this study is to examine the organizational attitudes and behaviors that managers are closely related to examine the effects of job satisfaction and organizational citizenship behaviors on individual work performance in the sample of the seafarerers working in the ferry and sea buses and to find out whether there are any significant differences in the organizational attitudes and behaviors according to the departments of the seafarerers. As a result of the analysis of the data obtained from 726 seafarers, it was determined that job satisfaction and organizational citizenship behavior, which had significant relations between them, had a positive effect on individual job performance and that the organizational citizenship behavior had a partial mediator variable effect in the relationship between job satisfaction and job performance. On the other hand, there were statistically significant differences in terms of organizational citizenship behaviors and job performance between deck, engine and auxiliary servicemen seafarers.