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3 2025

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Determining Port Wind Limiting Conditions for Safe Maneuvering and Berthing

Barić Mate, Toman Ivan, Kostovic Nina, Grbić Luka

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

2025

Vol. 19 No. 1

143--149

This paper examines the influence of lateral wind forces on ferry operations within the port of Gazenica, situated on the Croatian Adriatic coast. Utilizing wind data collected from May 2017 to June 2024, the study identifies southeasterly (SE) winds as the most critical factor affecting ferry maneuverability due to their frequency and intensity. The research assesses wind-induced forces on three specific ferries—"Brac," "Ugljan," and "Juraj Dalmatinac"—comparing these forces against their maximum propulsion capabilities. Findings reveal that extreme SE wind conditions can surpass the thrust capacity of these vessels, elevating the risk of drifting and grounding, as illustrated by the grounding incident of the ferry "Cres". Consequently, the study highlights the necessity for advancements in ship design, propulsion systems, navigational aids, and port infrastructure to mitigate risks associated with high wind speeds. Implementing such measures is vital for ensuring the safety and operational reliability of maritime activities in the port of Gazenica and comparable settings.

Consideration of Ship Reducing Speed as Collision Avoidance Action

Barić Mate, Pavić Vinko, Grbić Luka, Mislov Ivan

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

2025

Vol. 19 No. 2

395--398

Navigation through the TSS represent a certain amount of stress for watch crew. In such areas the traffic is heavier and close quarter situations and collisions are more likely to occur. Despite the COLREG regulations for navigation in TSS there are always situations which are differently interpretated by navigators and due to dense traffic avoiding collision can be challenging. As the COLREG rules state the collision can be most efficiently avoided by altering ship course, however sometimes that can be difficult in TSS during heavy traffic. This paper analyses the collisions and close quarter situations in TSS which could be avoided by reducing ship speed and reproduce similar situations in navigation simulator. Such reproduction on navigation simulator is used to analyses behaviors of navigator in collision situations and what prevents them to use speed reduction in collision avoidance. The results of the research may be used to familiarize the navigators that in certain situations reducing ship speed could be most efficient action to avoid collision.

Analysis of Marine Accidents within the Jurisdiction of the Harbourmaster's Office Zadar: Identifying the High-Risk Areas

Mavra Tomislav, Zekić Astrid, Gundić Ana, Grbić Luka

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

2025

Vol. 19 No. 2

417--423

The paper analyses marine accidents in the area under the jurisdiction of the Harbourmaster's Office Zadar. This research examines the categories of events, types of vessels, and the chronological distribution of accidents. Marine accident analysis has revealed a high incidence rate involving boats, predominantly in summer, and has highlighted several high-risk areas. The paper aims to identify the most common types of marine accidents and the times of year when they are most likely to occur. Furthermore, this paper proposes preventive measures to re-duce the risk of marine accidents and to enhance navigational safety. The recommendations in-clude fostering cooperation between the Vessel Traffic Service and the masters, deploying smart cameras, providing maritime traffic safety education, implementing regular data collection proce-dures, prohibiting autopilot use in coastal waters, installing psychological floating barriers at des-ignated swimming areas, and increasing the frequency of inspections during the summer months. The authors suggest implementing preventive measures in high-risk areas, like Mali Ždrelac and Mala Proversa.