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- W4238603911 abstract "Abstract. The trajectories prediction of the floating objects above the sea surface represents an important task in the search and rescue (SAR) operations. In this paper we show how may be possible estimate the most probable search area by means of a stocastic model, schematizing appropriately the shape of the object and evaluating the forces acting on it. The LEEWAY model, a Montecarlo-based ensemble trajectory model, has been used; here not only the statistical law to calculate the leeway is employed but also an almost deterministic law inspired by the boundary layer theory. The model is nested with the sub-regional hydrodynamic model TSCRM (Thyrrenian Sicily Channel Regional Model) developed in the framework of PON-TESSA (National Operative Programs-TEchnology for the Situational Sea Awareness) project. The principal objective of the work is to validate the new approach of leeway calculation relying on a real event of Person in Water (PIW), occurred on July 2013 in the Thyrrenian Sea. The results show that assimilating a human body to a cylinder and estimating either the transition from laminar to turbulent boundary layer and the drag coefficients, may be possible to solve a forces balance equation which permits to estimate with good approximation the search area. This new point of view leads to the possibility to check the same approach also on other different categories of targets, so as to overcome in the future the limitations associated with calculation of leeway by means of the standard statistical law." @default.
- W4238603911 created "2022-05-12" @default.
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- W4238603911 date "2016-04-11" @default.
- W4238603911 modified "2023-09-24" @default.
- W4238603911 title "Evaluation of the Search and Rescue Leeway model into the Tyrrhenian sea: a new point of view" @default.
- W4238603911 doi "https://doi.org/10.5194/nhess-2016-109" @default.
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