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In response to the challenges posed by the conventional manual flange docking method in the LNG (Liquefied Natural Gas) loading process, such as low positioning accuracy, constraints on production efficiency and safety hazards, this study analyzed the LNG five-axis loading arm’s main functions and structural characteristics.

An automated solution for the joints of the LNG loading arm was designed. The forward kinematic model of the LNG loading arm was established using the Denavit–Hartenberg (D-H) parameter method, and its workspace was analyzed. The Newton–Raphson iteration method was employed to solve the inverse kinematics of the LNG loading arm, facilitating trajectory planning. The relationship between the target position and the joint variables was established to verify the stability of the arm’s motion. Flange center identification was achieved using the Hough transform function. Based on the ROS platform, combined with Gazebo and Rviz, an experimental simulation of automatic docking of the LNG loading arm was conducted.

The docking errors in the XYZ directions were all less than 0.8 mm, meeting the required docking accuracy. Moreover, the motion performance of the loading arm during docking was smooth and free of abrupt changes, validating its capability to accomplish the automatic docking task.

The proposed trajectory planning and automatic docking scheme can be used for the rapid filling of LNG filling arms and LNG tankers to improve the efficiency of LNG transportation. In guiding the docking, the proposed automatic docking scheme is an accurate and efficient way to improve safety.

Since 2010, the eastern Mediterranean has witnessed a transformative narrative with the discovery of natural gas reserves off the coasts of Cyprus and Israel. This pivotal development has drawn attention to the region, where Egypt, Israel, Cyprus, Turkey, and Greece share maritime borders. The emergence of natural gas has reshaped geopolitical dynamics, and Western countries assume to reduce their reliance on Russia for energy supplies. This chapter explores the magnitude of natural gas discoveries and production in Cyprus and Israel, examining the interconnection of their fields and the ambitious endeavor of laying a 1,900-km underwater pipeline to the Greek island of Crete. Additionally, it highlights the pivotal roles played by key regional actors such as Israel, Turkey, and Egypt in shaping security and energy negotiations. However, Turkey has a significant position in the eastern Mediterranean and the Middle East, but tensions have arisen as neighboring countries seek to limit Turkey’s involvement in regional energy discussions, viewing its policies as a potential threat, thereby exacerbating Turkey’s regional interventions, particularly in Cyprus. Each of these countries in the Middle East is struggling to get more of the cake. Above all, Israel has been a gas importer throughout its history and now dreams of becoming a natural gas exporter to Europe.

The Eastern Mediterranean countries exhibit diversity in religion, culture, politics, and economy, amid rapid and dynamic regional developments shaped by global polarization and the international security landscape, rendering future prognostications challenging. This chapter delves into the realms of oil and natural gas production, the influx of multinational corporations, water boundaries, and renewable energy vis-à-vis fossil fuels in the Eastern Mediterranean, elucidating the realities of cooperation and competition within the region. Analysis of cooperation and competition dynamics is imperative for comprehending the tensions among states. Enhanced cooperation between states may lead to mutual benefits, such as increased oil and gas prices favoring their partnership, while any escalation in competition can swiftly be perceived as a threat, exacerbating tensions. The desirability of such cooperation or competition in the international political economy remains subject to ongoing debate.

This study aims to provide a comprehensive review of electric tugboat deployment in maritime transportation, including an in-depth assessment of its advantages and disadvantages. Along with the identification of advantages and disadvantages of electric tugboat deployment, the present research also aims to provide managerial insights into the economic viability of different tugboat alternatives that can guide future investments in the following years.

A detailed literature review was conducted, aiming to gain broad insights into tugboat operations and focusing on different aspects, including tugboat accidents and safety issues, scheduling and berthing of tugboats, life cycle assessment of diesel tugboats and their alternatives, operations of electric and hybrid tugboats, environmental impacts and others. Moreover, a set of interviews was conducted with the leading experts in the electric tugboat industry, including DAMEN Shipyards and the Port of Auckland. Econometric analyses were performed as well to evaluate the financial viability and economic performance of electric tugboats and their alternatives (i.e. conventional tugboats and hybrid tugboats).

The advantages of electric tugboats encompass decreased emissions, reduced operating expenses, improved energy efficiency, lower noise levels and potential for digital transformation through automation and data analytics. However, high initial costs, infrastructure limitations, training requirements and restricted range need to be addressed. The electric tugboat alternative seems to be the best option for scenarios with low interest rate values as increasing interest values negatively impact the salvage value of electric tugboats. It is expected that for long-term planning, the electric and hybrid tugboat alternatives will become preferential since they have lower annual costs than conventional diesel tugboats.

The outcomes of this research provide managerial insights into the practical deployment of electric tugboats and point to future research needs, including battery improvements, cost reduction, infrastructure development, legislative and regulatory changes and alternative energy sources. The advancement of battery technology has the potential to significantly impact the cost dynamics associated with electric tugboats. It is essential to do further research to monitor the advancements in battery technology and analyze their corresponding financial ramifications. It is essential to closely monitor the industry’s shift toward electric tugboats as their prices become more affordable.

The maritime industry is rapidly transforming and facing pressing challenges related to sustainability and digitization. Electric tugboats represent a promising and innovative solution that could address some of these challenges through zero-emission operations, enhanced energy efficiency and integration of digital technologies. Considering the potential of electric tugboats, the present study provides a comprehensive review of the advantages and disadvantages of electric tugboats in maritime transportation, extensive evaluation of the relevant literature, interviews with industry experts and supporting econometric analyses. The outcomes of this research will benefit governmental agencies, policymakers and other relevant maritime transportation stakeholders.

This chapter investigates the collective response to environmental hazards within the Mediterranean basin and the southeastern Mediterranean region, exploring the challenges posed to current energy transportation and economic policies. Despite the ecological significance of the Mediterranean Sea, it faces mounting human pressures and political conflicts, particularly in its eastern area, which threaten its ecological integrity. The chapter examines the extent of consensus and cooperation among Mediterranean states in addressing environmental degradation, considering the diverse interests at play, including economic, commercial, and environmental concerns. With a focus on countries such as Cyprus, Israel, Egypt, and Turkey, the chapter assesses the scope of cooperation in combating environmental degradation and safeguarding human security in the region amidst the backdrop of climate change and ecological challenges.