Patent ID: 8661998

Claim:
A rudder ( 1 ) for maneuvering a vessel ( 20 ), the rudder ( 1 ) comprising: a main rudder blade ( 12 ) having an upstream end ( 5 ) and a downstream end ( 6 ), the rudder ( 1 ) being rotatably mountable to the vessel around a rotation axis ( 38 ), the rudder ( 1 ) further comprising two generally upright extending auxiliary rudder blades ( 13 , 23 ) connected to the main rudder blade ( 12 ) by at least two transverse plates ( 2 , 3 ), wherein at least one of the transverse plates ( 2 , 3 ) is oriented generally obliquely upwards towards a downstream end ( 6 ), wherein the two transverse plates ( 2 , 3 ) are connected to a top and bottom end respectively of the auxiliary rudder ( 13 , 23 ) and/or the main rudder blade ( 12 ), wherein a top transverse plate ( 2 ), positioned above a bottom transverse plate ( 3 ), extends more obliquely upwards towards the downstream end ( 6 ) than the bottom transverse plate ( 3 ).