Bridle block for a deflector

A method of passively guiding a deflector into a known angle of attack relative to water when the deflector is being towed through the water, wherein the deflector is attached to a bridle block with fore bridle lines and aft bridle lines, wherein the bridle block comprises a bridle block comprising a stem and a rocker arm pivotably attached to each other on a pivot axis, the stem having an attachment for a towline from a vessel, a forward portion of the rocker arm having an attachment for fore bridle lines of the deflector, and an aft portion of the rocker arm having an attachment for aft bridle lines of the deflector, and the bridle block having a hydraulic cylinder provided with at least one valve, and the hydraulic cylinder being attached to the stem and the rocker arm to hold the stem and the rocker arm in a chosen relative position, wherein the at least one valve is operated directly or indirectly by an electric control signal from a control unit, and the at least one valve takes an open position when a control signal is missing, so that an open fluid connection is formed between the piston side of a piston and a reservoir for hydraulic oil or an open fluid connection is formed between the piston-rod side of the piston and the reservoir, and wherein direct or indirect electric control signals from the control unit to the at least one valve cease.