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Enhanced Predictive Diagnostics for Naval Equipment: Integrating MYT Decomposition for Advanced Process Monitoring

Boullosa-Falces David, Sanchez-Varela Zaloa, Lavin Egoitz Urtaran, Sanz David Salvador, Garcia Sergio

TransNav : International Journal on Marine Navigation and Safety of Sea Transportation

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2025

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Vol. 19 No. 2

543--548

EN

The competitiveness in maritime operations demands maintenance strategies that ensure high reliability and availability at minimal cost. While predictive diagnostics have shown promise in detecting deviations from optimal operating conditions, current methodologies often fail to effectively isolate and identify the contributing process variables. This study introduces an enhanced predictive diagnostic approach that integrates MYT (Mason, Young, Tracy) decomposition with traditional statistical monitoring techniques, such as Hotelling's T² control charts. By applying this methodology to the auxiliary systems of a 284-meter LNG tanker, we identified that the key variables driving process anomalies were Superheated Steam in Boiler 1 (Tn/h) and Superheated Steam in Boiler 2 (Tn/h). These findings underscore the ability of the proposed method to detect deviations before critical failures occur, providing ship operators with actionable insights to enable precise maintenance scheduling, reduce operational costs, and prevent unscheduled downtime. The demonstrated integration of MYT decomposition into predictive maintenance protocols highlights its potential to optimize monitoring accuracy and decision-making in complex naval systems.

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Dynamic Positioning Training and Certification Scheme: Overview and Prospects

Sanchez-Varela Zaloa, Boullosa-Falces David, Mandić Nikola

TransNav : International Journal on Marine Navigation and Safety of Sea Transportation

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2025

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Vol. 19 No. 1

29--35

EN

Dynamic positioning operators must follow a training scheme developed by The Nautical Institute to obtain their license. The training scheme comprises two courses (basic and simulator) and two periods of dynamic-positioning training on board, which is recorded in a logbook. The documentation is carefully double-checked when these are completed before issuing the certificate. This paper aims to present the details of this training, currently covered in Section B of the International Convention on the Standards of Training, Certification, and Watchkeeping (STCW), and to predict how the system would work if the scheme is referred to in Section A of the same Convention. The Dynamic Positioning training and certification scheme will be compared to other micro qualifications detailed in Section A of the STCW convention to achieve this prediction. The following items will be evaluated: access to the course, instructor's eligibility, control of materials and equipment, updating of the lesson plan, and certification control. The results show that the Dynamic positioning training scheme is much superior in all the researched categories due to the rapid capacity for updating the materials and for the strict controls placed in lieu by The Nautical Institute to accredit training centres, including equipment and personnel, and especially the certificate-issuing system, keeping frauds to a minimum.

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Analysis of Maritime Pilots’ Education in the Republic of Croatia

Zekić Astrid, Sanchez-Varela Zaloa, Skoko Ivica, Ivče Renato

TransNav : International Journal on Marine Navigation and Safety of Sea Transportation

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2025

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Vol. 19 No. 1

21--28

EN

This paper systematically and comprehensively presents maritime pilots’ education, internships, and training in the Republic of Croatia. The paper will analyse their additional education since maritime pilots play a crucial role in ensuring maritime safety and environmental protection. The pilotage in the Republic of Croatia is subject to the provisions outlined in the Maritime Code and the Ordinance on Sea Pilotage. To effectively carry out their duties, maritime pilots require specialised training and education, as outlined in IMO Resolution A.960(23). Universities and specialised institutions respond to the growing demands of the maritime sector by offering additional education. They use simulators to train pilots in various manoeuvring scenarios under different weather conditions. Although not legally mandated in Croatia, pursuing additional education has proven to be highly beneficial for the maritime industry. The paper’s primary goal is to investigate the implementation and quality of additional education for maritime pilots, emphasising the possibilities for further training. The research involved creating a questionnaire assessing the implementation of further education initiatives for maritime pilots in Croatia. The results have shown that maritime pilots consider additional education necessary, especially for specific types of vessels.