24. The sensors are secured to the inside of the PVC arms by two 

 brass screws that pass through the arms and thread into the 

 acrylic housings. 



25. The center plate is next placed into the top of the fuselage 

 and the center sensors positioned within it. 



26.' The plexiglass end-cap is then attached to the top of the 

 fuselage. 



D. Field Preparation and Installation 



27. Copper scour pads are placed into the ends of the arms and 

 the arm end-caps screwed on. 



28- The cable is retreived and mated to the instrument on the 

 underside of the can and a plexiglass plate attached to the bottom 

 of the fuselage. 



29. With the cradle already on the seafloor, the instrument is 

 brought underwater and positioned onto it. The plate breaching 

 the gap about the center of the cradle must be removed to allow 

 passage of the cable, then replaced after installation. 



30. Free cable may then be stored in the service box; the top of 

 which is removed by unthreading a titanium nut on each top corner 

 of the box. 



