Abstract: Described herein is a system for stabilising a watercraft with a hull. The stabilising system comprises a stabilising fin fixed with respect to a shaft of the fin, a driving system comprising an electric motor with hollow shaft and a reduction gear with hollow shaft for turning the shaft of the fin, and a control system configured for receiving identification data on the roll of the watercraft and for driving the electric motor as a function of the roll. In particular, the casing of the driving system comprises a toroidal portion configured for being inserted in an opening of the hull, wherein the toroidal portion comprises features for fixing the casing to the hull. The reduction gear comprises an output connected to the shaft of the fin and an input.

Abstract: Described herein is a system for stabilising a watercraft with a hull. The stabilising system comprises a stabilising fin fixed with respect to a shaft of the fin, a driving system comprising an electric motor with hollow shaft and a reduction gear with hollow shaft for turning the shaft of the fin, and a control system configured for receiving identification data on the roll of the watercraft and for driving the electric motor as a function of the roll. In particular, the casing of the driving system comprises a toroidal portion configured for being inserted in an opening of the hull, wherein the toroidal portion comprises means for fixing the casing to the hull. The reduction gear comprises an output connected to the shaft of the fin and an input.

Abstract: A method for controlling a stabilizing fin for anti-roll stabilization of watercraft standing at anchor, comprising the steps of: detecting at least one value identifying roll of the watercraft; estimating the expected oscillation of roll of the watercraft as a function of the value detected; determining a path for the movement of the stabilizing fin as a function of the expected roll; and controlling the movement of the stabilizing fin as a function of the path.

Abstract: A method for controlling a stabilizing fin for anti-roll stabilization of watercraft standing at anchor, comprising the steps of: detecting at least one value identifying roll of the watercraft; estimating the expected oscillation of roll of the watercraft as a function of the value detected; determining a path for the movement of the stabilizing fin as a function of the expected roll; and controlling the movement of the stabilizing fin as a function of the path.

Abstract: An automatic system for anti-roll stabilization of watercraft, comprising, a stabilizing fin that can turn about an axis, an actuator assembly, designed to govern rotation of said fin about said axis, and a regulating system, designed to govern said actuator assembly as a function of signals indicating rolling of the watercraft. Said actuator assembly comprises an electric motor connected to said stabilizing fin.