Deflector grip adapter, deflector and system for launching and hauling of such a deflector

A seismic deflector comprising:

• a float with two or more generally vertically downward protruding wing profiles connected by at least upper and lower horizontal plates connected via fore and aft bridle lines to a bridle block and further to a towing line for being towed from a seismic survey vessel,
• wherein said bridle block comprises two triple head arms each with 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,
• wherein said hinge bearing block further comprises an outer end of a grip adapter stem which in its opposite, inner end is provided with a trip adapter axle block with a transverse, through extending and protruding grip adapter axle for being gripped by a crane jaw, and
• wherein said grip adapter axle block via the grip adapter axle has a sheave block stem further connected to a sheave block for a tow line sheave for the outer end of a towing line.

A marine deflector handling system comprising:

• a seismic survey vessel with a deflector towing sheave with a towing line to a seismic deflector bridle block,
• wherein said bridle block comprises, 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, and
• 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.

A method of launching a seismic deflector from a seismic survey vessel, comprising the steps of:

• a crane with a crane jaw with jaws lays hold of the protruding portions of a grip adapter axle which is transverse and protruding on either sides between a bridle block's sheave block and a hinge bearing block,
• connecting a towing line to the sheave block,
• after which said crane lifts said deflector and brings it outside the ship's side of the seismic survey vessel,
• after which said towing line is tensioned to take over the load of said bridle block with said deflector hanging below,
• after which the jaws are opened and said crane jaw is released and removed from said grip adapter axle, and
• after which said towing line lowers said deflector to the sea.