This invention provides methods, systems and apparatus for processing a message of a large number of agents. A subsea riser valve assembly 20 may be actuated from the drilling rig DR by axial movement of the upper riser 35 relative to the lower riser 28, for sealing an interior portion of the lower riser 28 and well bore WB below the subsea riser valve assembly 20. The image sensor interface receives the image data from the CMOS image sensor, and the wireless device interface being configured to receive user inputs from the wireless device port.