Filters

Settings

Now showing1 - 2 of 2
  • Some of the metrics are blocked by your 
    consent settings
    Item type:Publication, Access status: without files ,
    A novel approach to calculate fuel consumption of offshore wind operation and maintenance vessels using AIS data
    (Springer, 2026-02)
    Ravi, Kaushik
    ;
    Weigell, Jürgen
    ;
    Jahn, Carlos
    Offshore wind is considered environmentally friendly; however, the logistics side involves a large number of vessels for operation and maintenance, contributing to greenhouse gas emissions which should not be overlooked. This paper presents a methodology for estimating fuel consumption and emissions of offshore wind service vessels operating in offshore wind farms by using Automatic Identification System (AIS) data. The approach accounts for ship resistance components, propulsion power requirements, and emission factors for multiple fuel types. Validation against real operational data of an offshore supply vessel shows close correlation, with fuel consumption estimates deviating by approximately 12.5% from recorded measurements. The findings underscore the potential of an AIS-based analysis to optimize fuel consumption and reduce emissions of offshore wind supply vessels.
    Publicationtype: Conference Paper
      43
  • Some of the metrics are blocked by your 
    consent settings
    Item type:Publication, Access status: without files ,
    An AIS-based analysis of the transfer of maritime pilots
    (Springer, 2026-02)
    Juwig, Paul
    ;
    Kastner, Marvin
    ;
    Jahn, Carlos
    This study presents a systematic analysis of maritime pilot transfer operations using Automatic Identification System (AIS) data. Pilots are essential nautical service providers who enable safe navigation of ships during port calls. Their transfers are facilitated by pilot boats whose activities influence the efficiency of port calls. The methodological framework developed in this study segments ship trajectories of pilot boats into nine operational categories, with particular emphasis on embarkation and disembarkation. These events are detected using a ship domain–based identification method, enabling the recognition of transfer operations directly from AIS data. Data from three Scandinavian regions are analyzed over a ten-day period. These include ports within the Oslofjord, the port of Helsinki and the port of Copenhagen. Results show that pilot boats spend the majority of their time berthed, while embarkation and disembarkation constitute relatively small shares of total activity. Average transfer durations are approximately two to three minutes, with limited variation across ship size classes, though larger ships tend to require more time. Speed analyses further reveal distinct maneuvering phases, with higher speeds observed when a pilot is on board. The findings provide empirical reference values for pilot transfer operations and demonstrate the potential of AIS-based methods to enhance port call optimization.
    Publicationtype: Conference Paper
      35