138 



Data logging plotter 



Computer ^2 

 (Sensor process 8t plot) 



Graphic console 



I 



M i J ; ; 5 5 



DP control 

 Radio positioning display 



Navigation plotter 



Computer ^ 1 

 (Acquisition navigation) 



Video 

 coax 



=«c=>= 



Surface 

 controller 



Bottom equipment 

 control console 



I 



Teletransmission 

 system 



^=T 



Data 

 transmission 



It 





I 



Dynamic 



positioning 



control 



Ship 

 atitude 

 sensor 



I 



n 



Vj u u u 



DP 

 Trains 



Long 



base 



processor 



^ 



Long 

 base 

 cable 



Short base 

 receiver- — 



& 



Short 



base 



pjnger 



LEAK 

 DETECTION 



POTENTIAL 

 READINGS 



FIGURE 5.1 BLOCK DIAGRAM OF THE INTERSUB PIPELINE SURVEYING SYSTEM'S 



INSTRUMENTATION AND SURFACE PROCESSING 



(Courtesy of Intersub, Marseilles) 



