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    Item type:Publication, Access status: with files ,
    Dynamic navigation and port call optimisation in real time
    (Institute of Physics (IOP), 2026-04)
    Holte, E.
    ;
    Fjørtoft, K. E.
    ;
    Hagaseth, M.
    ;
    Rialland, A.
    ;
    Braga, J.
    European maritime transport policy emphasises the criticality of a well-functioning waterborne transport system as a key element towards realising sustainable economic growth in Europe. An important part in this equation is a required transition to low- or zero-carbon fuels. However, if one is to succeed on such a pathway, eventually leading to net zero emissions by 2050, more energy-efficient ship and port operations are crucial. The need for such operational changes becomes particularly evident when looking at today’s operations, where the prevailing practice is commonly referred to as “the hurry up and wait syndrome”. Here, ships often sail between ports as fast as possible to secure terminal and berth availability, frequently ending up waiting for days, sometimes weeks, on anchorage outside ports. As of congested waters, not only does this have a negative impact on navigational safety, but energy-wise it is also a highly sub-optimal way of operating a ship. One main reason for this is that most ports still operate on a first-come first-served basis. Hence, cutting emissions from making changes in modus operandi should clearly be attainable. This potential for improvement is backed up by numbers, and according to the World Bank, around 15 percent of ships’ greenhouse gas emissions on average are associated with port operations. In addition, as merchant ships spend on average 5% on their operational time waiting at anchorage, there is also an untapped potential to reduce emissions at sea from converting this waiting time into slower sailing time, estimated at up to 25 percent. As a direct response to this challenge, this paper presents a viable way forward by introducing the EU-funded DYNAPORT project method on how to facilitate “just-in-time” arrivals, and thereby as a contribution towards realising more energy efficient ship operations and port call optimisation. Key aspects are seamless digital coordination between ships and ports, optimisation tools that ensure safe voyage optimisation planning with energy optimal sailing given weather conditions and ship performance data, and an arrival time to the berth that has been agreed on by all shore actors, including the port, terminal and the ship representative. This includes new port call processes that are supported by standardized communication and early exchange of reliable data between ship and shore, enabling seamless coordination between all actors.
    Publicationtype: Journal Article
      21  3
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    Item type:Publication, Access status: with files ,
    The effects of pre-arrival vessel prioritisation strategies for port call coordination
    (Technische Universität Dresden, Professur für Technische Logistik, 2025-10-21)
    Oberhauser Tavares Braga, João Pedro
    ;
    Kastner, Marvin
    ;
    Derin, Yasemin
    ;
    Jahn, Carlos
    This simulation study investigates the impacts of pre-arrival vessel prioritization strategies on port call coordination using a simulation model that integrates discrete-event and agent-based techniques. Motivated by the environmental and operational inefficiencies of the traditional first-come-first-served (FCFS) port policies, the simulation assesses how early and structured communication of arrival intentions, as first-announced-first-served (FAFS), can enhance berth allocation, improve resource utilization in the port, and reduce ship emissions. The model replicates a real port environment using empirical data and Python-based libraries evaluating multiple prioritization strategies under varying timing rules for port call announcements. Results demonstrate that structured pre-arrival announcements improve turnaround times and berth occupancy, particularly under strategies setting upper timing limits. However, results vary by terminal type and installed capacity. The findings underscore the need for improved digital infrastructure and cooperative governance to enable Just-in-Time (JIT) arrivals, highlighting the potential for simulation to support decision-making in port operations modernization.
    Publicationtype: Conference Paper
      55  28
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    Item type:Publication, Access status: with files ,
    MASS operations in port calls
    (IOP Publishing, 2025-10-01)
    Oberhauser Tavares Braga, João Pedro
    ;
    Fjørtoft, Kay
    To achieve success in the maritime industry's shift towards autonomous vessels - seeking the goals of enhanced efficiency, environmental sustainability, and improved safety - it is crucial to develop, test, and validate new procedures and technologies for autonomous ship operations, which includes management of Maritime Autonomous Surface Ships (MASS) at port. So far, the focus of autonomy in maritime has been mainly on the navigational issues, and not as much on the integration between port technology and procedures, and remote operations centre (ROC) operation. MASS will not necessarily have its bridge, cargo handling equipment, and maintenance being manned by onboard agents, but can rather be fully operated and organised by a ROC. To overcome these challenges, there are different areas of concern that must be considered such as navigation and docking, cargo handling, and maintenance, etc.
    Publicationtype: Conference Paper
      33  25
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    Item type:Publication, Access status: with files ,
    The art of orchestrating nautical services in a port call: a literature classification
    (IOP Publishing, 2024)
    Derin, Yasemin
    ;
    Oberhauser Tavares Braga, João Pedro
    ;
    Kastner, Marvin
    ;
    Jahn, Carlos
    Global carbon dioxide emissions are forecast to increase by around 15% by 2050 compared to 2020. In order to move towards a sustainable transition to net zero emissions by 2050, more energy-efficient operations are a prerequisite. In response, terminals are looking for ways to optimise port processes to reduce energy consumption while also keeping waiting time and costs low. This paper focuses on optimisation approaches for the individual actors in the nautical service that can support these objectives. A comprehensive review, classification and discussion of the relevant literature on current methods and procedures for the stakeholders of the nautical service is conducted. In this regard, current challenges and limitations are identified. The results of the classification scheme show that tugboats in particular are examined in more detail. The objective is often to reduce costs and increase safety in the port area. For this purpose, mathematical approaches, or various types of algorithms are usually applied. Future research activities could be based on more detailed analyses of the approaches used in the identified papers.
    Publicationtype: Conference Paper
      90  34