Abstract: A marine deflector handling system includes a seismic survey vessel with a deflector towing sheave with a towing line to a seismic deflector bridle block. The bridle block includes, as counted from its outer end to its inner end: two triple head arms with each its triple head in their outer ends for fore and aft sets of bridle lines to a deflector, wherein said triple head arms in their inner ends are coupled together in a hinge bearing block which further holds an outer end of a grip adapter stem, wherein said grip adapter stem in its opposite, inner end is provided with a grip adapter axle block with a transverse through extending and protruding grip adapter axle arranged for being gripped by a crane jaw, wherein said grip adapter axle further holds an outer end of a sheave block stem with an inner end provided with a sheave block for said towing line.

Abstract: A marine geophysical deflector for towing seismic arrays includes a float main body with one or more deflector wings extending downwards into the sea, and one or more slender top float elements arranged generally in a longitudinal direction on top of the main body. The number of the top float elements may be two or more. There may be arranged two or more distance floats below the float main body and an upper horizontal plate at the top of the one or more deflector wings.

Abstract: A marine deflector handling system includes a seismic survey vessel with a deflector towing sheave with a towing line to a seismic deflector bridle block. The bridle block includes, as counted from its outer end to its inner end: two triple head arms with each its triple head in their outer ends for fore and aft sets of bridle lines to a deflector, wherein said triple head arms in their inner ends are coupled together in a hinge bearing block which further holds an outer end of a grip adapter stem, wherein said grip adapter stem in its opposite, inner end is provided with a grip adapter axle block with a transverse through extending and protruding grip adapter axle arranged for being gripped by a crane jaw, wherein said grip adapter axle further holds an outer end of a sheave block stem with an inner end provided with a sheave block for said towing line.

Abstract: A marine geophysical deflector for towing seismic arrays includes a float main body with one or more deflector wings extending downwards into the sea, and one or more slender top float elements arranged generally in a longitudinal direction on top of the main body. The number of the top float elements may be two or more. There may be arranged two or more distance floats below the float main body and an upper horizontal plate at the top of the one or more deflector wings.

Abstract: A bridle block system for a paravane for seismic equipment includes a main bridle block with a connecting point for a towing line from a seismic vessel, and with attachment points for first and second triples of bridle lines to first and second lugs at either ends of the paravane. The main block includes a pivot point for a pivot arm, which has an arm with an attachment point near its end for the first triple bridle lines, and an oppositely directed arm with an attachment point near its outer end for second triple bridle lines. An auxiliary moment arias at the second arm's side is connected to a seventh bridle line, further connected to an actuator arranged near the first bridle lines' forward lugs' of the paravane. The seventh bridle exerts a force imbalance between the fore and aft bridle lines to change the paravane's angle of attack.

Abstract: A bridle line control winch for a deflector for marine towing, with fore and aft double or triple bridle lines to attachment points in upper, possible middle, and lower parts of the deflector, preferably in horizontal plate frames, wherein at least said fore or aft bridle lines are arranged to be adjusted inwardly and outwardly so as for adjusting an attack angle of said deflector relative to a course line. The bridle line control winch is provided with a pivotally arranged control winch frame arranged between said bridle lines' attachment points to the deflector, and the bridle lines themselves. The control winch frame is provided with a winch sheave with an asymmetrically arranged pulley arranged on said winch sheave for holding an eyelet or end of said bridle line. The winch sheave is arranged to be driven by an actuator in a desired direction of rotation.