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Ships-to-ship magnetic mooring systems – the new perspectives

Kołakowski P., Rutkowski G., Łebkowski A.

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

2023

Vol. 17 No. 4

841--851

Each type of ship must have appropriate mooring systems adapted to the fact that after the end of the voyage and shutdown of its propulsion, it is moored and is not exposed to the dangers related to the negative influence of external factors. Moreover, the mooring of two ships of different and/or similar sizes at sea for transshipment or service always requires special techniques and special care to ultimately avoid damage to the vessel throughout the approach or breakage of the lines due to excessive loads. As reported by the UK P&I Club, mooring incidents are among the top seven types of insurance claims. Most of the vessels still use traditional mooring systems, knowns for centuries. Despite changes in regulations to reduce the number of incidents, also new technologies related to the mooring of ships began to develop. This article provides a review of the latest research focuses, applications, and future perspectives regarding mooring systems mainly related to ship-to-ship interaction. Moreover, a new device called Mobile Electromagnetic Mooring System (MEMS) has been introduced and described. Finally, modern mooring systems' challenges and future perspectives have been discussed.

Simulation in reduced scale hydraulic models of the mooring system of ships docked under the effect of the passage of other vessels (passing ship)

Esferra R., Bernardino J.C.M, Bezerra R., Pion L.M.

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

2021

Vol. 15 No. 4

845--852

Vessels moored at port terminals may be subject to excessive strain on mooring lines, induced by other ships passing in their vicinity. This phenomenon is called hydrodynamic interaction, and well known in the international literature as Passing Ship. It occurs due to the displacement of the mass of water between the two vessels, which, consequently, induces hydrodynamic stresses on the two ships. Within this context, scale models are a powerful tool for hydrodynamics studies, being able of reproduce the complex water flow phenomena that take place around passing and moored ship. This paper presents a scale model technique to study the Passing Ship phenomenon and its application on a case study developed for the Santos Port. The study was based on the analysis of the results of simulations performed on a 1:170 scale model to compare the effect of various navigations conditions on the mooring lines of a docked ship.