Fishing ship stability during purse seining: industrial anchovy fishing in Peru

Schuler Frantzen J.; Celis Carbajal M.A.; Manco Rivera M.R. · Marine Systems and Ocean Technology (2025) · DOI: 10.1007/s40868-025-00167-y

Resumen

Purse seine fishing is an activity that, in its final phase, brings the loaded vessel to extreme conditions of transverse stability. Under such circumstances, operations are limited, and it is not easy to adhere to the operational limits of navigation. A procedure is presented to measure the density of the shoal, which is crucial for adjusting the heeling load. The forces and moments that occur during purse seine fishing in calm waters are defined by considering three fishing configurations and their corresponding fishing equipment. The aim is to provide some practical mathematical formulas that allow for limiting the fishing capacity of vessels, thereby ensuring their minimum stability and safety through the capacity of the fishing instruments. To achieve this goal, data from five real and typical vessels in the Peruvian fishing industry are utilized to evaluate typical transverse stability curves under operational conditions, as well as to establish formulations for the maximum loads of the fishing equipment. Stability criteria based on purse seine fishing operations are proposed to facilitate the assessment of vessel limits during fishing. © The Author(s), under exclusive licence to Sociedade Brasileira de Engenharia Naval 2025.